Lenovo M93Z Hmm User Manual All In One (Think Centre) Type 10AF

M93Z Hmm Hardware Maintenance Manual (HMM) - ThinkCentre M93z M93z All-in-One (ThinkCentre) - Type 10AF m93z_hmm ThinkCentre M93z, 10AF

1970-01-01

User Manual: Lenovo M93Z Hmm M93z All-in-One (ThinkCentre) - Type 10AF ThinkCentre M93z, 10AF

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ThinkCentre M93z
Hardware Maintenance Manual

Machine Types: 10AC, 10AD, 10AE and 10AF

Note: Before using this information and the product it supports, be sure to read and understand Chapter 2
“Safety information” on page 3 and Appendix A “Notices” on page 133.

Second Edition (June 2014)
© Copyright Lenovo 2013, 2014.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant a General Services Administration
“GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-35F-05925.

Contents
Chapter 1. About this manual . . . . . . 1
Important Safety Information . . . . . . . . . .

Chapter 2. Safety information . . . . . . 3
General safety . . . . . . . . . . . .
Electrical safety . . . . . . . . . . .
Safety inspection guide . . . . . . . .
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . .
Grounding requirements . . . . . . . .
Tip-over hazard prevention notice . . . .
Safety notices (multi-lingual translations) .

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5
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Chapter 3. General information . . . .

Specifications . . . . . . . . . . . . . . .
Lenovo programs . . . . . . . . . . . . .
Accessing Lenovo programs on the Windows
7 operating system . . . . . . . . . . .
Accessing Lenovo programs on the Windows
8 or Windows 8.1 operating system . . . .
Lenovo Support Web site . . . . . . . . . .

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30

31
31

Chapter 4. General checkout . . . . .

Problem determination tips . . . . . . . . . .

Chapter 5. Troubleshooting and
diagnostics . . . . . . . . . . . . . .
Basic troubleshooting . . . . . . . . .
Accessing Control Panel on the Windows 8
operating system. . . . . . . . . . .
Troubleshooting procedure . . . . . . .
Troubleshooting . . . . . . . . . . .
Audio problems . . . . . . . . .
CD problems . . . . . . . . . .
DVD problems . . . . . . . . . .
Intermittent problems . . . . . . .
Hard disk drive problems . . . . . .
Keyboard, mouse, or pointing device
problems . . . . . . . . . . . .
Monitor problems. . . . . . . . .
Networking problems . . . . . . .
Option problems . . . . . . . . .
Performance and lockup problems . .
Printer problems . . . . . . . . .
Serial port problems. . . . . . . .
Software problems . . . . . . . .
USB problems . . . . . . . . . .
Diagnostics . . . . . . . . . . . . .

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Lenovo Solution Center . . . . . . . . .
UEFI diagnostic program . . . . . . . . .

53
54

Chapter 6. Using the Setup Utility
program . . . . . . . . . . . . . . . .

Starting the Setup Utility program . . . . . . .
Viewing and changing settings . . . . . . . .
Using passwords. . . . . . . . . . . . . .
Password considerations . . . . . . . . .
Power-On Password . . . . . . . . . .
Administrator Password . . . . . . . . .
Hard Disk Password. . . . . . . . . . .
Setting, changing, and deleting a password .
Erasing lost or forgotten passwords (clearing
CMOS) . . . . . . . . . . . . . . . .
Enabling or disabling a device . . . . . . . .
Selecting a startup device . . . . . . . . . .
Selecting a temporary startup device . . . .
Selecting or changing the startup device
sequence . . . . . . . . . . . . . . .
Enabling ErP LPS compliance mode . . . . . .
ICE performance mode . . . . . . . . . . .
ICE thermal alert . . . . . . . . . . . . . .
Changing the BIOS settings before installing a new
operating system. . . . . . . . . . . . . .
Exiting the Setup Utility program . . . . . . .

55
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56
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56

Chapter 7. Symptom-to-FRU index . .

Hard disk drive boot error . .
Power Supply Problems . . .
Beep symptoms . . . . . .
POST error codes . . . . .
Miscellaneous error conditions
Undetermined problems . . .

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58
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61
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63
65

Chapter 8. Locations . . . . . . . . .

Locating connectors, controls, and indicators
the front of your computer . . . . . . . .
Using your computer in monitor mode .
Accessing the On Screen Display (OSD) .
Locating connectors on the rear of your
computer . . . . . . . . . . . . . . .
Locating major FRUs and CRUs . . . . . .
Looking up FRU information . . . . . . .
Locating parts on the system board . . . .
Adjusting the frame stand . . . . . . . .
Adjusting the monitor stand . . . . . . .
Machine type and model label . . . . . .

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on
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Chapter 9. Replacing FRUs . . . . . .

Handling static-sensitive devices . . . . . . .
Installing or replacing hardware . . . . . . . .
Installing external options . . . . . . . .
Installing the monitor stand . . . . . . . .
Removing the computer cover. . . . . . .
Removing and reinstalling the frame foot . .
Removing and reinstalling the rear I/O
assembly . . . . . . . . . . . . . . .
Installing or replacing a memory module . . .
Replacing the hard disk drive . . . . . . .
Replacing the optical drive . . . . . . . .
Replacing the converter board. . . . . . .
Replacing the heat sink . . . . . . . . .
Replacing the microprocessor . . . . . . .
Replacing the internal speakers . . . . . .
Replacing the thermal sensor . . . . . . .
Replacing the cover presence switch (also
called intrusion switch). . . . . . . . . .
Replacing the integrated camera . . . . . .
Replacing the WiFi card . . . . . . . . .
Replacing the ambient light sensor . . . . .
Replacing the card reader . . . . . . . .
Replacing the mSATA solid-state drive or mini
PCI Express x1 card. . . . . . . . . . .
Replacing the ExpressCard . . . . . . . .
Replacing the heat sink and fan assembly for
GPU . . . . . . . . . . . . . . . . .
Replacing the rear PS/2 connectors and serial
port assembly . . . . . . . . . . . . .
Replacing the battery . . . . . . . . . .
Replacing the power supply assembly . . .

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84
85

ThinkCentre M93zHardware Maintenance Manual

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88
90
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103
104
106
107
108
110
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115

Replacing the microprocessor fan . . . . .
Replacing the LCD panel . . . . . . . . .
Replacing the system board . . . . . . .
Replacing the touch panel control boards . .
Replacing the power switch and control button
board . . . . . . . . . . . . . . . .
Replacing the WiFi antennas . . . . . . .
Completing the parts replacement . . . . .

Chapter 10. Additional Service
Information . . . . . . . . . . . . .
Security features . . . . . . . . . . . . .
Hardware controlled Passwords . . . . .
Operating system password . . . . . .
Vital product data. . . . . . . . . . .
BIOS levels . . . . . . . . . . . . . . .
Flash update procedures . . . . . . . . .
Updating (flashing) the BIOS from a disc . . .
Updating (flashing) the BIOS from your operating
system . . . . . . . . . . . . . . . . .
Recovering from a POST/BIOS update failure .
Power management . . . . . . . . . . .
Advanced configuration and power interface
(ACPI) BIOS . . . . . . . . . . . . .
Automatic Power-on features . . . . . .

123
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129
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132

Appendix A. Notices . . . . . . . . .
Television output notice . . . . . . . . . . .
European conformance CE mark . . . . . . .
Trademarks . . . . . . . . . . . . . . . .

Index. . . . . . . . . . . . . . . . .

116
118
119
122

133
134
134
134

135

Chapter 1. About this manual
This manual provides service and reference information for ThinkCentre® computers listed on the front cover.
This manual is intended only for trained service personnel who are familiar with Lenovo® computer products.
Before servicing a Lenovo computer product, be sure to read “Important Safety Information” on page 1.
Chapter 7 “Symptom-to-FRU index” on page 61 and Chapter 10 “Additional Service Information” on page
129 are not specific to any machine type. These chapters are applicable to all ThinkCentre computers.
For major FRU locations and Customer Replaceable Unit (CRU) identification, see Chapter 8 “Locations”
on page 67.
For FRU replacement instructions, see Chapter 9 “Replacing FRUs” on page 81.
For FRU part numbers, go to:
http:/www.lenovo.com/serviceparts-lookup

Important Safety Information
Be sure to read all caution and danger statements in this book before performing any of the instructions.
Veuillez lire toutes les consignes de type DANGER et ATTENTION du présent document avant d'exécuter
les instructions.
Lesen Sie unbedingt alle Hinweise vom Typ "ACHTUNG" oder "VORSICHT" in dieser Dokumentation, bevor
Sie irgendwelche Vorgänge durchführen
Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una
qualsiasi delle istruzioni
Certifique-se de ler todas as instruções de cuidado e perigo neste manual antes de executar qualquer
uma das instruções
Es importante que lea todas las declaraciones de precaución y de peligro de este manual antes de seguir
las instrucciones.

ThinkCentre M93zHardware Maintenance Manual

Chapter 2. Safety information
This chapter contains the safety information that you need to be familiar with before servicing a computer.

General safety
Follow these rules to ensure general safety:
• Observe good housekeeping in the area of the machines during and after maintenance.
• When lifting any heavy object:
1. Ensure you can stand safely without slipping.
2. Distribute the weight of the object equally between your feet.
3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.
4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the
muscles in your back.
Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are
too heavy for you.
• Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.
• Before you start the machine, ensure that other service representatives and the customer's personnel are
not in a hazardous position.
• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing
the machine.
• Keep your tool case away from walk areas so that other people will not trip over it.
• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves
are fastened or rolled up above your elbows. If your hair is long, fasten it.
• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, approximately
8 centimeters (3 inches) from the end.
• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
Remember: Metal objects are good electrical conductors.
• Wear safety glasses when you are: hammering, drilling, soldering, cutting wire, attaching springs, using
solvents, or working in any other conditions that might be hazardous to your eyes.
• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device
that is worn or defective.
• Reinstall all covers correctly before returning the machine to the customer.

Electrical safety

CAUTION:
Electrical current from power, telephone, and communication cables can be hazardous. To avoid
personal injury or equipment damage, disconnect the attached power cords, telecommunication
systems, networks, and modems before you open the computer covers, unless instructed otherwise
in the installation and configuration procedures.
Observe the following rules when working on electrical equipment.
© Copyright Lenovo 2013, 2014

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft
material that does not insulate you when working with live electrical currents. Many customers have, near
their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.
Do not use this type of mat to protect yourself from electrical shock.
• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
– Removing or installing Field Replaceable Units (FRUs)
• Before you start to work on the machine, unplug the power cord. If you cannot unplug it, ask the customer
to power-off the wall box that supplies power to the machine and to lock the wall box in the off position.
• If you need to work on a machine that has exposed electrical circuits, observe the following precautions:
– Ensure that another person, familiar with the power-off controls, is near you.
Remember: Another person must be there to switch off the power, if necessary.
– Use only one hand when working with powered-on electrical equipment; keep the other hand in your
pocket or behind your back.
Remember: There must be a complete circuit to cause electrical shock. By observing the above rule,
you may prevent a current from passing through your body.
– When using a tester, set the controls correctly and use the approved probe leads and accessories for
that tester.
– Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as
metal floor strips and machine frames.
Observe the special safety precautions when you work with very high voltages; these instructions are in
the safety sections of maintenance information. Use extreme care when measuring high voltages.
• Regularly inspect and maintain your electrical hand tools for safe operational condition.
• Do not use worn or broken tools and testers.
• Never assume that power has been disconnected from a circuit. First, check that it has been powered-off.
• Always look carefully for possible hazards in your work area. Examples of these hazards are moist floors,
nongrounded power extension cables, power surges, and missing safety grounds.
• Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. The surface is
conductive; such touching can cause personal injury and machine damage.
• Do not service the following parts with the power on when they are removed from their normal operating
places in a machine:
– Power supply units
– Pumps
– Blowers and fans
– Motor generators
and similar units. (This practice ensures correct grounding of the units.)
• If an electrical accident occurs:
– Use caution; do not become a victim yourself.
– Switch off power.
– Send another person to get medical aid.

ThinkCentre M93zHardware Maintenance Manual

Safety inspection guide
The intent of this inspection guide is to assist you in identifying potentially unsafe conditions on these
products. Each machine, as it was designed and built, had required safety items installed to protect users
and service personnel from injury. This guide addresses only those items. However, good judgment should
be used to identify potential safety hazards due to attachment of features or options not covered by this
inspection guide.
If any unsafe conditions are present, you must determine how serious the apparent hazard could be and
whether you can continue without first correcting the problem.
Consider these conditions and the safety hazards they present:
• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal
electrical shock).
• Explosive hazards, such as a damaged CRT face or bulging capacitor
• Mechanical hazards, such as loose or missing hardware
The guide consists of a series of steps presented in a checklist. Begin the checks with the power off, and
the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, broken, or sharp edges).
2. Power-off the computer. Disconnect the power cord.
3. Check the power cord for:
a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground
continuity for 0.1 ohm or less between the external ground pin and frame ground.
b. The power cord should be the appropriate type as specified in the parts listings.
c. Insulation must not be frayed or worn.
4. Remove the cover.
5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.
6. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or
other liquids, or signs of fire or smoke damage.
7. Check for worn, frayed, or pinched cables.
8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered with.

Handling electrostatic discharge-sensitive devices
Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects.
Protect against ESD damage by equalizing the charge so that the machine, the part, the work mat, and the
person handling the part are all at the same charge.
Notes:
1. Use product-specific ESD procedures when they exceed the requirements noted here.
2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.
When handling ESD-sensitive parts:
• Keep the parts in protective packages until they are inserted into the product.
• Avoid contact with other people while handling the part.
Chapter 2. Safety information

• Wear a grounded wrist strap against your skin to eliminate static on your body.
• Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even
when you are wearing a wrist strap.
• Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially
useful when handling ESD-sensitive devices.
• Select a grounding system, such as those listed below, to provide protection that meets the specific
service requirement.
Note: The use of a grounding system is desirable but not required to protect against ESD damage.
– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.
– Use an ESD common ground or reference point when working on a double-insulated or
battery-operated system. You can use coax or connector-outside shells on these systems.
– Use the round ground-prong of the ac plug on ac-operated computers.

Grounding requirements
Electrical grounding of the computer is required for operator safety and correct system function. Proper
grounding of the electrical outlet can be verified by a certified electrician.

Tip-over hazard prevention notice
• Place the computer on a sturdy and low base, or anchor the furniture and position the computer as
far back on the furniture as possible.
• Keep remote controls, toys, and other items that might attract children off the computer.
• Keep the computer, cables, and cords out of the reach of children.
• Supervise children in rooms where these safety tips have not been followed.

Safety notices (multi-lingual translations)
The caution and danger safety notices in this section are provided in the following languages:
• English
• Arabic
• Brazilian/Portuguese
• Chinese (simplified)
• Chinese (traditional)
• French
• German
• Hebrew
• Italian
• Korean
• Spanish

ThinkCentre M93zHardware Maintenance Manual

DANGER
Electrical current from power, telephone and communication cables is hazardous.
To avoid a shock hazard:
• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
• Connect all power cords to a properly wired and grounded electrical outlet.
• Connect to properly wired outlets any equipment that will be attached to this product.
• When possible, use one hand only to connect or disconnect signal cables.
• Never turn on any equipment when there is evidence of fire, water, or structural damage.
• Disconnect the attached power cords, telecommunications systems, networks, and modems
before you open the device covers, unless instructed otherwise in the installation and configuration
procedures.
• Connect and disconnect cables as described in the following tables when installing, moving, or
opening covers on this product or attached devices.
To Connect

To Disconnect

1. Turn everything OFF.

2. First, attach all cables to devices.

2. First, remove power cords from outlet.

3. Attach signal cables to connectors.

3. Remove signal cables from connectors.

4. Attach power cords to outlet.

4. Remove all cables from devices.

5. Turn device ON.

CAUTION:
When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery
recommended by the manufacturer. If your system has a module containing a lithium battery, replace
it only with the same module type made by the same manufacturer. The battery contains lithium and
can explode if not properly used, handled, or disposed of. Do not:
• Throw or immerse into water
• Heat to more than 100°C (212°F)
• Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.

CAUTION:
When laser products (such as CD-ROMs, DVD-ROM drives, fiber optic devices, or transmitters) are
installed, note the following:
• Do not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• Use of controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.

Chapter 2. Safety information

DANGER
Some laser products contain an embedded Class 3A or Class 3B laser diode. Note the following:
Laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.

≥18 kg (37 lbs)

≥32 kg (70.5 lbs)

≥55 kg (121.2 lbs)

CAUTION:
Use safe practices when lifting.

CAUTION:
The power control button on the device and the power switch on the power supply do not turn off
the electrical current supplied to the device. The device also might have more than one power
cord. To remove all electrical current from the device, ensure that all power cords are disconnected
from the power source.

2
1

ThinkCentre M93zHardware Maintenance Manual

Chapter 2. Safety information

≥18 kg (37 lbs)

≥32 kg (70.5 lbs)

≥55 kg (121.2 lbs)

2
1

PERIGO
A corrente elétrica proveniente de cabos de alimentação, de telefone e de comunicações é perigosa.
10

ThinkCentre M93zHardware Maintenance Manual

Para evitar risco de choque elétrico:
• Não conecte nem desconecte nenhum cabo ou execute instalação, manutenção ou reconfiguração
deste produto durante uma tempestade com raios.
• Conecte todos os cabos de alimentação a tomadas elétricas corretamente instaladas e aterradas.
• Todo equipamento que for conectado a este produto deve ser conectado a tomadas corretamente
instaladas.
• Quando possível, utilize apenas uma das mãos para conectar ou desconectar cabos de sinal.
• Nunca ligue nenhum equipamento quando houver evidência de fogo, água ou danos estruturais.
• Antes de abrir tampas de dispositivos, desconecte cabos de alimentação, sistemas de telecomunicação,
redes e modems conectados, a menos que especificado de maneira diferente nos procedimentos de
instalação e configuração.
• Conecte e desconecte os cabos conforme descrito na tabela apresentada a seguir ao instalar, mover ou
abrir tampas deste produto ou de dispositivos conectados.
Para Conectar:

Para Desconectar:

1. DESLIGUE Tudo.

2. Primeiramente, conecte todos os cabos aos
dispositivos.

2. Primeiramente, remova os cabos de alimentação das
tomadas.

3. Conecte os cabos de sinal aos conectores.

3. Remova os cabos de sinal dos conectores.

4. Conecte os cabos de alimentação às tomadas.

4. Remova todos os cabos dos dispositivos.

5. LIGUE os dispositivos.

CUIDADO:
Ao substituir a bateria de lítio, utilize apenas uma bateria com Número de Peça 45C1566 ou um tipo
de bateria equivalente recomendado pelo Se o seu sistema possui um módulo com uma bateria de
lítio, substitua-o apenas por um módulo do mesmo tipo e do mesmo fabricante. A bateria contém lítio
e pode explodir se não for utilizada, manuseada ou descartada de maneira correta.
Não:
• Jogue ou coloque na água
• Aqueça a mais de 100°C (212°F)
• Conserte nem desmonte
Descarte a bateria conforme requerido pelas leis ou regulamentos locais.

PRECAUCIÓN:
Quando produtos a laser (como unidades de CD-ROMs, unidades de DVD-ROM, dispositivos de fibra ótica
ou transmissores) estiverem instalados, observe o seguinte:
• Não remova as tampas. A remoção das tampas de um produto a laser pode resultar em exposição
prejudicial à radiação de laser. Não existem peças que podem ser consertadas no interior do dispositivo.

Chapter 2. Safety information

• A utilização de controles ou ajustes ou a execução de procedimentos diferentes dos especificados aqui
pode resultar em exposição prejudicial à radiação.
PERIGO
Alguns produtos a laser contêm diodo de laser integrado da Classe 3A ou da Classe 3B. Observe o seguinte:
Radiação a laser quando aberto. Não olhe diretamente para o feixe a olho nu ou com instrumentos ópticos e
evite exposição direta ao feixe.

≥18 kg (37 lbs)

≥32 kg (70.5 lbs)

≥55 kg (121.2 lbs)

CUIDADO:
Utilize procedimentos de segurança para levantar equipamentos.

CUIDADO:
O botão de controle de alimentação do dispositivo e o botão para ligar/desligar da fonte de alimentação
não desligam a corrente elétrica fornecida ao dispositivo. O dispositivo também pode ter mais de um cabo
de alimentação. Para remover toda a corrente elétrica do dispositivo, assegure que todos os cabos de
alimentação estejam desconectados da fonte de alimentação.

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ThinkCentre M93zHardware Maintenance Manual

Chapter 2. Safety information

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ThinkCentre M93zHardware Maintenance Manual

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Chapter 2. Safety information

DANGER
Le courant électrique provenant de l'alimentation, du téléphone et des câbles de transmission peut présenter
un danger.
Pour éviter tout risque de choc électrique :
• Ne manipulez aucun câble et n'effectuez aucune opération d'installation, d'entretien ou de reconfiguration
de ce produit au cours d'un orage.
• Branchez tous les cordons d'alimentation sur un socle de prise de courant correctement câblé et mis à la
terre.
• Branchez sur des socles de prise de courant correctement câblés tout équipement connecté à ce produit.
• Lorsque cela est possible, n'utilisez qu'une seule main pour connecter ou déconnecter les câbles
d'interface.
• Ne mettez jamais un équipement sous tension en cas d'incendie ou d'inondation, ou en présence de
dommages matériels.
• Avant de retirer les carters de l'unité, mettez celle-ci hors tension et déconnectez ses cordons
d'alimentation, ainsi que les câbles qui la relient aux réseaux, aux systèmes de télécommunication et aux
modems (sauf instruction contraire mentionnée dans les procédures d'installation et de configuration).
• Lorsque vous installez, que vous déplacez, ou que vous manipulez le présent produit ou des périphériques
qui lui sont raccordés, reportez-vous aux instructions ci-dessous pour connecter et déconnecter les
différents cordons.
Connexion

Déconnexion

1. Mettez les unités HORS TENSION.

2. Commencez par brancher tous les cordons sur les
unités.

2. Débranchez les cordons d'alimentation des prises.

3. Branchez les câbles d'interface sur des connecteurs.

4. Débranchez tous les câbles des unités.

3. Débranchez les câbles d'interface des connecteurs.

4. Branchez les cordons d'alimentation sur des prises.
5. Mettez les unités SOUS TENSION.

ATTENTION:
Remplacer la pile au lithium usagée par une pile de référence identique exclusivement, (référence
45C1566), ou suivre les instructions du fabricant qui en définit les équivalences. Si votre système est
doté d'un module contenant une pile au lithium, vous devez le remplacer uniquement par un module
identique, produit par le même fabricant. La pile contient du lithium et peut exploser en cas de
mauvaise utilisation, de mauvaise manipulation ou de mise au rebut inappropriée.
Ne pas :
• la jeter à l'eau,
• l'exposer à des températures supérieures à 100°C,
• chercher à la réparer ou à la démonter.
Ne pas mettre la pile à la poubelle. Pour la mise au rebut, se reporter à la réglementation en vigueur.

ThinkCentre M93zHardware Maintenance Manual

ATTENTION:
Si des produits à laser (tels que des unités de CD-ROM, de DVD-ROM, des unités à fibres optiques, ou
des émetteurs) sont installés, prenez connaissance des informations suivantes :
• Ne retirez pas le carter. En ouvrant l'unité de CD-ROM ou de DVD-ROM, vous vous exposez au
rayonnement dangereux du laser. Aucune pièce de l'unité n'est réparable.
• Pour éviter tout risque d'exposition au rayon laser, respectez les consignes de réglage et
d'utilisation des commandes, ainsi que les procédures décrites dans le présent manuel.

DANGER
Certains produits à laser contiennent une diode à laser intégrée de classe 3A ou 3B. Prenez
connaissance des informations suivantes:
Rayonnement laser lorsque le carter est ouvert. Evitez toute expositiondirecte au rayon laser. Evitez
de regarder fixement le faisceau ou del'observer à l'aide d'instruments optiques.

≥18 kg (37 lbs)

≥32 kg (70.5 lbs)

≥55 kg (121.2 lbs)

ATTENTION:
Soulevez la machine avec précaution.

ATTENTION:
L'interrupteur de contrôle d'alimentation de l'unité et l'interrupteur dubloc d'alimentation ne coupent
pas le courant électrique alimentantl'unité. En outre, le système peut être équipé de plusieurs
cordonsd'alimentation. Pour mettre l'unité hors tension, vous devez déconnectertous les cordons
de la source d'alimentation.

Chapter 2. Safety information

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VORSICHT
An Netz-, Telefon- und Datenleitungen können gefährliche Spannungen anliegen.
Aus Sicherheitsgründen:
• Bei Gewitter an diesem Gerät keine Kabel anschließen oder lösen. Ferner keine Installations-,
Wartungs- oder Rekonfigurationsarbeiten durchführen.
• Gerät nur an eine Schutzkontaktsteckdose mit ordnungsgemäß geerdetem Schutzkontakt
anschließen.
• Alle angeschlossenen Geräte ebenfalls an Schutzkontaktsteckdosen mit ordnungsgemäß
geerdetem Schutzkontakt anschließen.
• Die Signalkabel nach Möglichkeit einhändig anschließen oder lösen, um einen Stromschlag durch
Berühren von Oberflächen mit unterschiedlichem elektrischem Potenzial zu vermeiden.
• Geräte niemals einschalten, wenn Hinweise auf Feuer, Wasser oder Gebäudeschäden vorliegen.
• Die Verbindung zu den angeschlossenen Netzkabeln, Telekommunikationssystemen, Netzwerken
und Modems ist vor dem Öffnen des Gehäuses zu unterbrechen, sofern in den Installations- und
Konfigurationsprozeduren keine anders lautenden Anweisungen enthalten sind.
• Zum Installieren, Transportieren und Öffnen der Abdeckungen des Computers oder der
angeschlossenen Einheiten die Kabel gemäß der folgenden Tabelle anschließen und abziehen.
Zum Anschließen der Kabel gehen Sie wie folgt vor

Zum Abziehen der Kabel gehen Sie wie folgt vor

1. Schalten Sie alle Einheiten AUS.

2. Schließen Sie erst alle Kabel an die Einheiten an.
3. Schließen Sie die Signalkabel an die Buchsen an.

2. Ziehen Sie zuerst alle Netzkabel aus den
Netzsteckdosen.

4. Schließen Sie die Netzkabel an die Steckdose an.

3. Ziehen Sie die Signalkabel aus den Buchsen.

5. Schalten Sie die Einheit EIN.

4. Ziehen Sie alle Kabel von den Einheiten ab.

CAUTION:
Eine verbrauchte Lithiumbatterie nur durch eine Batterie mit der Teilenummer 45C1566 oder eine
gleichwertige, vom Hersteller empfohlene Batterie ersetzen. Enthält das System ein Modul mit einer
Lithiumbatterie, dieses nur durch ein Modul desselben Typs und von demselben Hersteller ersetzen.
Die Batterie enthält Lithium und kann bei unsachgemäßer Verwendung, Handhabung oder Entsorgung
explodieren.
Die Batterie nicht:
• mit Wasser in Berührung bringen.

ThinkCentre M93zHardware Maintenance Manual

• über 100 C erhitzen.
• reparieren oder zerlegen.
Die örtlichen Bestimmungen für die Entsorgung von Sondermüll beachten.

ACHTUNG:
Bei der Installation von Lasergeräten (wie CD-ROM-Laufwerken, DVD- aufwerken, Einheiten mit
Lichtwellenleitertechnik oder Sendern) Folgendes beachten:
• Die Abdeckungen nicht entfernen. Durch Entfernen der Abdeckungen des Lasergeräts können
gefährliche Laserstrahlungen freigesetzt werden. Das Gerät enthält keine zu wartenden Teile.
• Werden Steuerelemente, Einstellungen oder Durchführungen von Prozeduren anders als hier
angegeben verwendet, kann gefährliche Laserstrahlung auftreten.

VORSICHT
Einige Lasergeräte enthalten eine Laserdiode der Klasse 3A oder 3B. Beachten Sie Folgendes:
Laserstrahlung bei geöffneter Verkleidung. Nicht in den Strahl blicken. Keine Lupen oder Spiegel
verwenden. Strahlungsbereich meiden.

≥18 kg

≥32 kg

≥55 kg

ACHTUNG:
Arbeitsschutzrichtlinien beim Anheben der Maschine beachten.

ACHTUNG:
Mit dem Netzschalter an der Einheit und am Netzteil wird die Stromversorgung für die Einheit
nicht unterbrochen. Die Einheit kann auch mit mehreren Netzkabeln ausgestattet sein. Um die
Stromversorgung für die Einheit vollständig zu unterbrechen, müssen alle zum Gerät führenden
Netzkabel vom Netz getrennt werden.

Chapter 2. Safety information

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Chapter 2. Safety information

PERICOLO
La corrente elettrica proveniente dai cavi di alimentazione, del telefono e di comunicazione può essere
pericolosa.
Per evitare il rischio di scosse elettriche:
• Non collegare o scollegare qualsiasi cavo oppure effettuare l'installazione, la manutenzione o la
riconfigurazione del prodotto durante un temporale.
• Collegare tutti i fili elettrici a una presa di alimentazione correttamente cablata e dotata di messa a
terra.
• Collegare alle prese elettriche appropriate tutte le apparecchiature che verranno utilizzate per
questo prodotto.
• Se possibile, utilizzare solo una mano per collegare o scollegare i cavi di segnale.
• Non accendere assolutamente apparecchiature in presenza di incendi, perdite d'acqua o danno
strutturale.
• Scollegare i cavi di alimentazione, i sistemi di telecomunicazione, le reti e il modem prima di
aprire i coperchi del dispositivo, salvo istruzioni contrarie relative alle procedure di installazione e
configurazione.
• Collegare e scollegare i cavi come descritto nella seguente tabella quando vengono effettuate
operazioni di installazione, spostamento o apertura dei coperchi di questo prodotto o delle unità
collegate.
Per collegarsi

Per scollegarsi

1. SPEGNERE le apparecchiature.

2. Innanzitutto, collegare tutti i cavi alle unità.
3. Collegare i cavi di segnale ai connettori.

2. Innanzitutto, rimuovere i cavi di alimentazione dalla
presa.

4. Collegare i cavi di alimentazione alla presa.

3. Rimuovere i cavi di segnale dai connettori.

5. Accendere l'unità.

4. Rimuovere tutti i cavi dalle unità.

ATTENZIONE:
Quando si sostituisce la batteria al litio, utilizzare solo il Numero parte 45C1566 o un tipo di batteria
equivalente consigliato dal produttore. Se sul sistema è presente un modulo che contiene una batteria
al litio, sostituirlo solo con un tipo di modulo dello stesso tipo della stessa casa di produzione. La
batteria contiene litio e può esplodere se usata, maneggiata o smaltita in modo non corretto.
Non:
• Gettare o immergere la batteria nell'acqua
• Riscaldarla ad una temperatura superiore ai 100 gradi C (212 gradi F)
• Smontarla, ricaricarla o tentare di ripararla
Le batterie usate vanno smaltite in accordo alla normativa in vigore (DPR 915/82 e successive
disposizioni e disposizioni locali).
22

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ATTENZIONE:
Quando vengono installati prodotti laser (quali CD-ROM, unità DVD-ROM, unità a fibre ottiche o
trasmittenti), tener presente quanto segue:
• Non rimuovere gli sportelli. L'apertura di un'unità laser può determinare l'esposizione a radiazioni
laser pericolose. All'interno dell'unità non vi sono parti su cui effettuare l'assistenza tecnica.
• L'utilizzo di controlli, regolazioni o l'esecuzione di procedure non descritti nel presente manuale
possono provocare l'esposizione a radiazioni pericolose.

PERICOLO
Alcune unità laser contengono un diodo laser di Classe 3A o Classe 3B. Tener presente quanto segue:
Aprendo l'unità vengono emesse radiazioni laser. Non fissare il fascio, non guardarlo direttamente
con strumenti ottici ed evitare l'esposizione al fascio.

≥18 kg

≥32 kg

≥55 kg

ATTENZIONE:
Prestare attenzione nel sollevare l'apparecchiatura.

ATTENZIONE:
Il pulsante di controllo dell'alimentazione presente sull'unità e l'interruttore dell'alimentatore non
disattivano l'alimentazione corrente fornita all'unità. E' possibile che l'unità disponga di più cavi di
alimentazione. Per disattivare l'alimentazione dall'unità, accertarsi che tutti i cavi di alimentazione
siano scollegati dalla fonte di alimentazione.

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PELIGRO
La corriente eléctrica procedente de cables de alimentación, teléfonos y cables de comunicación puede
ser peligrosa.
Para evitar el riesgo de descarga eléctrica:
• No conecte ni desconecte los cables ni realice ninguna tarea de instalación, mantenimiento o
reconfiguración de este producto durante una tormenta eléctrica.
• Conecte todos los cables de alimentación a tomas de corriente debidamente cableadas y
conectadas a tierra.
• Cualquier equipo que se conecte a este producto también debe conectarse a tomas de corriente
debidamente cableadas.
• Siempre que sea posible, utilice una sola mano para conectar o desconectar los cables de señal.
Chapter 2. Safety information

• No encienda nunca un equipo cuando hay señales de fuego, agua o daños estructurales.
• Desconecte los cables de alimentación, los sistemas de telecomunicaciones, las redes y los
módems conectados antes de abrir las cubiertas de los dispositivos, a menos que se indique lo
contrario en los procedimientos de instalación y configuración.
• Conecte y desconecte los cables, como se describe en la tabla siguiente, cuando instale, mueva o
abra las cubiertas de este producto o de los dispositivos conectados.
Para conectar

Para desconectar

1. APÁGUELO todo.

2. En primer lugar, conecte todos los cables a los
dispositivos.

2. En primer lugar, desenchufe los cables de alimentación
de las tomas de corriente.

3. Conecte los cables de señal a los conectores.

3. Desconecte los cables de señal de los conectores.

4. Enchufe los cables de alimentación a las tomas de
corriente.

4. Desconecte todos los cables de los dispositivos.

5. Encienda el dispositivo.

PRECAUCIÓN:
Cuando sustituya una batería de litio, utilice solamente una batería número de pieza 45C1566 u otra
de tipo equivalente recomendada por el fabricante. Si su sistema dispone de un módulo que contiene
una batería de litio, reemplácelo sólo con el mismo tipo de módulo, del mismo fabricante. La batería
contiene litio y puede explotar si no se utiliza, manipula o desecha correctamente.
No debe:
• Arrojarla al agua o sumergirla en ella
• Exponerla a temperaturas superiores a 100°C (212°F)
• Repararla o desmontarla
Deshágase de la batería según especifiquen las leyes o normas locales.

PRECAUCIÓN:
Cuando haya productos láser (como unidades de CD-ROM, unidades de DVD, dispositivos de fibra
óptica o transmisores) instalados, tenga en cuenta lo siguiente:
• No quite las cubiertas. Si quita las cubiertas del producto láser, podría quedar expuesto a radiación
láser peligrosa. Dentro del dispositivo no existe ninguna pieza que requiera servicio técnico.
• Si usa controles o ajustes o realiza procedimientos que no sean los especificados aquí, podría
exponerse a radiaciones peligrosas.

PELIGRO

ThinkCentre M93zHardware Maintenance Manual

Algunos productos láser tienen incorporado un diodo láser de clase 3A o clase 3B. Tenga en cuenta lo
siguiente:
Cuando se abre, queda expuesto a radiación láser. No mire directamente al rayo láser, ni siquiera con
instrumentos ópticos, y evite exponerse directamente al rayo láser.

≥18 kg

≥32 kg

≥55 kg

PRECAUCIÓN:
Adopte procedimientos seguros al levantar el equipo.

PRECAUCIÓN:
El botón de control de alimentación del dispositivo y el interruptor de alimentación de la fuente de
alimentación no desconectan la corriente eléctrica suministrada al dispositivo. Además, el dispositivo
podría tener más de un cable de alimentación. Para suprimir toda la corriente eléctrica del dispositivo,
asegúrese de que todos los cables de alimentación estén desconectados de la toma de corriente.

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Chapter 2. Safety information

ThinkCentre M93zHardware Maintenance Manual

Chapter 3. General information
This chapter provides general information that applies to all machine types supported by this publication.

Specifications
This section lists the physical specifications for your computer.
Dimensions (no stand)
• Touch models:
Width: 568 mm (22.36 inches)
Height: 401 mm (15.79 inches)
Depth: 68.5 mm (2.70 inches)
• Non-touch models:
Width: 568 mm (22.36 inches)
Height: 401 mm (15.79 inches)
Depth: 67 mm (2.64 inches)
Weight (no stand)
• Touch models:
Maximum configuration as shipped: 10.14 kg (23.35 lb)
• Non-touch models:
Maximum configuration as shipped: 8.6 kg (18.96 lb)
Environment
• Air temperature:
Operating: 10°C to 35°C (50°F to 95°F)
Storage in original shipping package: -40°C to 60°C (-40°F to 140°F) in original shipping package
Storage without package: -10°C to 60°C (14°F to 140°F) without package
• Humidity:
Operating: 20% to 80% (non-condensing)
Storage: 20% to 90% (non-condensing)
• Altitude:
Operating: -15.2 to 3 048 m (-50 to 10 000ft)
Storage: -15.2 to 10 668 m (-50 to 35 000ft)
Electrical input
• Input voltage:
– Low range:
Minimum: 100 V ac
Maximum: 127 V ac
Input frequency range: 50 or 60 Hz
– High range:
Minimum: 200 V ac
Maximum: 240 V ac
© Copyright Lenovo 2013, 2014

Input frequency range: 50 or 60 Hz

Lenovo programs
Your computer comes with Lenovo programs to help you work more easily and securely. Depending on the
Microsoft® Windows® operating system preinstalled, the programs might vary.

Accessing Lenovo programs on the Windows 7 operating system
You can access Lenovo programs on the Microsoft Windows 7 operating system through Windows Search
or from Control Panel. The icon name displayed in the search result or Control Panel might be different from
the program name. You can find the program by its program name or icon name as shown in the Lenovo
programs available on the Windows 7 operating system table.
Note: If you do not find the program you need, open the Lenovo ThinkVantage® Tools program to find the
dimmed icon for the program. Then double-click the icon to install the program.
To access Lenovo programs through Windows Search, do the following:
1. Click the Start button and then type the program name or the icon name into the search box.
2. Locate the program by the program name or the icon name and then click the program to launch it.
To access Lenovo programs from Control Panel, do the following:
Note: Some Lenovo programs might not be displayed in Control Panel. To find these programs, use
Windows Search.
1. Click Start ➙ Control Panel. Change the view of Control Panel from Category to Large icons or Small
icons.
2. Locate the program by the icon name and then click the program to launch it.
The following table lists the programs available on the Windows 7 operating system.
Note: Depending on your computer model, some of the Lenovo programs might not be available.
Table 1. Lenovo programs available on the Windows 7 operating system
Program name

Icon name

Communications Utility

Lenovo - Web Conferencing

Fingerprint Manager Pro or
ThinkVantage Fingerprint Software

Lenovo - Fingerprint Manager Pro or Lenovo - Fingerprint Reader

Lenovo Bluetooth Lock

Lenovo Reach

Lenovo SHAREit

Lenovo Solution Center

Lenovo - System Health and Diagnostics

Lenovo ThinkVantage tools

Lenovo Thinkvantage tools

Password Manager

Lenovo - Password Vault

PC Cloud Manager

Power Manager

Lenovo - Power Controls

Recovery Media

Lenovo - Factory Recovery Disks or Create Recovery Media

Rescue and

Recovery®

Lenovo - Enhanced Backup and Restore

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Table 1. Lenovo programs available on the Windows 7 operating system (continued)
Program name

Icon name

System Update

Lenovo - Update and Drivers

View Management Utility

Lenovo - View Management Utility

Accessing Lenovo programs on the Windows 8 or Windows 8.1 operating
system
If your computer is preinstalled with the Microsoft Windows 8 or Microsoft Windows 8.1 operating system,
you can access Lenovo programs by doing one of the following:
• On the Windows 8 operating system, press the Windows key
to go to the Start screen. Click a Lenovo
program to launch it. If you cannot find the program you need, move the pointer to the bottom-right corner
of the screen to display the charms. Then click the Search charm to search for the desired program.
to go to the Start screen. Click a
• On the Windows 8.1 operating system, press the Windows key
Lenovo program to launch it. If you cannot find the program you need, click the arrow icon
in the
bottom-left corner of the screen to go to the Apps screen. Find the desired program in the apps list or
search for it in the search box in the top-right corner of the screen.
Depending on your computer model, your computer supports some of the following Lenovo programs:
• Fingerprint Manager Pro or ThinkVantage Fingerprint Software
• Lenovo Bluetooth Lock
• Lenovo Companion
• Lenovo QuickCast
• Lenovo Reach
• Lenovo Settings
• Lenovo Solution Center
• Lenovo Support
• Password Manager
• PC Cloud Manager
• System Update

Lenovo Support Web site
Technical support information is available on the Lenovo Support Web site at:
http://www.lenovo.com/support
This Web site is updated with the latest support information such as the following:
• Drivers and software
• Diagnostic solutions
• Product and service warranty
• Product and parts details
• User guides and manuals
• Knowledge base and frequently asked questions

Chapter 3. General information

ThinkCentre M93zHardware Maintenance Manual

Chapter 4. General checkout
Attention
The drives in the computer you are servicing might have been rearranged or the drive startup sequence might
have been changed. Be extremely careful during write operations such as copying, saving, or formatting.
Data or programs can be overwritten if you select an incorrect drive.
General error messages appear if a problem or conflict is found by an application program, the operating
system, or both. For the explanation of these messages, refer to the information supplied with that software
package.
Before replacing a FRU, ensure that the latest level of BIOS is installed on the system. A down-level BIOS
might cause false errors and unnecessary replacement of the system board. For more information on how to
determine and obtain the latest level BIOS, see “BIOS levels” on page 129.
Use the following procedure to help determine the cause of a problem:
1. Power-off the computer and all external devices.
2. Check all cables and power cords.
3. Set all display controls to the middle position.
4. Power-on all external devices.
5. Power-on the computer.
• Look for displayed error codes
• Listen for beep codes
• Look for readable instructions or a main menu on the display.
If you did not receive the correct response, proceed to step 6.
If you do receive the correct response, proceed to step 7.
6. Look at the following conditions and follow the instructions:
• If you hear beep codes during POST, go to “Beep symptoms” on page 61.
• If the computer displays a POST error, go to “POST error codes” on page 62.
• If the computer hangs and no error is displayed, turn off the computer and the power. Then, turn the
power and the computer back on, continue at step 7.
7. Run the Diagnostic programs. See “Diagnostics” on page 53.
• If you receive an error, replace the part that the diagnostic program calls out.
• If the test stops and you cannot continue, replace the last device tested.

Problem determination tips
Due to the variety of hardware and software combinations that can be encountered, use the following
information to assist you in problem determination. If possible, have this information available when
requesting assistance from Service Support and Engineering functions.
• Machine type and model
• Processor or hard disk drive upgrades
• Failure symptom
– Do diagnostics indicate a failure?
– What, when, where, single, or multiple systems?
– Is the failure repeatable?
© Copyright Lenovo 2013, 2014

– Has this configuration ever worked?
– If it has been working, what changes were made prior to it failing?
– Is this the original reported failure?
• Diagnostics version
– Type and version level
• Hardware configuration
– Print (print screen) configuration currently in use
– BIOS level
• Operating system software
– Type and version level
Notes: To eliminate confusion, identical systems are considered identical only if they:
1. Are the exact machine type and models
2. Have the same BIOS level
3. Have the same adapters/attachments in the same locations
4. Have the same address jumpers/terminators/cabling
5. Have the same software versions and levels
6. Have the same Diagnostic Diskettes (version)
7. Have the same configuration options set in the system
8. Have the same setup for the operating system control files
Comparing the configuration and software set-up between “working and non-working” systems will often
lead to problem resolution.

ThinkCentre M93zHardware Maintenance Manual

Chapter 5. Troubleshooting and diagnostics
This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is
not described here, see “Lenovo Support Web site” on page 31 for additional troubleshooting resources.

Basic troubleshooting
The following table provides information to help you troubleshoot your computer problems.
Note: If you cannot correct the problem, have the computer serviced. For a list of service and support
telephone numbers, refer to the Safety, Warranty, and Setup Guide that comes with your computer or go to
the Lenovo Support Web site at http://www.lenovo.com/support/phone.
Symptom
The computer does not start
when you press the power
switch.

Action
Verify that:
• The power cord is correctly connected to the rear of the computer and to a
working electrical outlet.
• If your computer has a secondary power switch on the rear of the computer,
make sure that it is switched on.
• The power indicator on the front of the computer is on.
• The computer voltage matches the voltage available at the electrical outlet for
your country or region.

The keyboard does not work.

Verify that:
• The computer is turned on.
• The keyboard is securely connected to a USB connector or a PS2 connector
on the computer.
• No keys are stuck.

The mouse does not work.

Verify that:
• The computer is turned on.
• The mouse is securely connected to a USB connector or a PS2 connector on
the computer.
• The mouse is clean.

The operating system does not
start.

Verify that:

The computer beeps multiple
times before the operating
system starts.

Verify that no keys are stuck.

• The startup sequence includes the device where the operating system resides.
Usually, the operating system is on the hard disk drive. For more information,
see “Selecting a startup device” on page 58.

Accessing Control Panel on the Windows 8 operating system
On the Windows operating system, you can view and change computer settings through Control Panel. To
access Control Panel on the Windows 8 operating system, do one of the following:
• From the desktop
1. Move the cursor to the top-right or bottom-right corner of the screen to display the charms.

2. Click Settings.
3. Click Control Panel.
• From the Start screen
1. Move the cursor to the top-right or bottom-right corner of the screen to display the charms.
2. Click Search.
3. On the Apps screen, scroll to the right side, and click Control Panel in the Windows System section.

Troubleshooting procedure
Use the following procedure as a starting point for diagnosing problems you are experiencing with your
computer:
1. Verify that the cables for all attached devices are connected correctly and securely.
2. Verify that all attached devices that require ac power are connected to properly grounded, functioning
electrical outlets.
3. Verify that all attached devices are enabled in the BIOS settings of your computer. For more information
about accessing and changing the BIOS settings, refer to your Chapter 6 “Using the Setup Utility
program” on page 55.
4. Go to the “Troubleshooting” on page 36 and follow the instructions for the type of problem you are
experiencing. If the Troubleshooting information does not help you resolve a problem, continue with the
next step.
5. Try using a previously captured configuration to see if a recent change to hardware or software settings
has caused a problem. Before restoring a previous configuration, capture your current configuration in
case the older configuration settings do not solve the problem or have adverse affects. To restore a
captured configuration, do the following:
• For Windows 7: Click Start ➙ Control Panel ➙ System and Security ➙ System ➙ System
Protection ➙ System Restore.
• For Windows 8: Open Control Panel, and then click System and Security ➙ System ➙ System
Protection ➙ System Restore.
If this does not correct the problem, continue with the next step.
6. Run the diagnostic program. See “Lenovo Solution Center” on page 53 for more information.
• If the diagnostic program detects a hardware failure, contact the Lenovo Customer Support Center.
See “Lenovo Support Web site” on page 31 for more information.
• If you are unable to run the diagnostic program, contact the Lenovo Customer Support Center. See
“Lenovo Support Web site” on page 31 for more information.
• If the diagnostic program does not detect a hardware failure, continue with the next step.
7. Use an antivirus program to see if your computer has been infected by a virus. If the program detects a
virus, remove the virus.
8. If none of these actions solve the problem, seek technical assistance. See “Lenovo Support Web
site” on page 31 for more information.

Troubleshooting
Use the troubleshooting information to find solutions to problems that have definite symptoms.
If the symptom your computer is experiencing occurred immediately after you installed a new hardware
option or new software, do the following before referring to the troubleshooting information:
1. Remove the new hardware option or software. If you must remove the computer cover to remove a
hardware option, make sure you review and follow the electrical safety information provided with your
computer. For your safety, do not operate the computer with the cover removed.
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ThinkCentre M93zHardware Maintenance Manual

2. Run the diagnostic programs to ensure your computer is operating correctly.
3. Reinstall the new hardware option or software following the manufacturer's instructions.
Select the problem your computer is experiencing from the following list:
•

“Audio problems” on page 37

•

“CD problems” on page 38

•

“DVD problems” on page 39

•

“Intermittent problems” on page 40

•

“Hard disk drive problems” on page 41

•

“Keyboard, mouse, or pointing device problems” on page 41

•

“Networking problems” on page 45

•

“Option problems” on page 48

•

“Performance and lockup problems” on page 49

•

“Printer problems” on page 51

•

“Serial port problems” on page 51

•

“Software problems” on page 52

•

“USB problems” on page 53

Audio problems
Select your symptom from the following list:
•
•

“No audio in Windows” on page 37
“An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive”
on page 38

•

“Sound comes from one external speaker only” on page 38

•

“No audio in DOS applications or games” on page 38

No audio in Windows
Symptom: No audio in Windows
Actions:
• If you are using powered external speakers that have an On/Off control, verify that the On/Off control is
set to the On position and the speaker power cable is connected to a properly grounded, functional ac
electrical outlet.
• If your external speakers have a volume control, verify that the volume control is not set too low.
• Double-click the speaker icon in the Windows notification area. A master volume-control window opens.
Verify that the Mute settings are not checked and none of the volume settings is set too low.
• Verify that your external speakers (and headphones, if used) are connected to the correct audio connector
on the computer. Most speaker cables are color-coded to match the connector.
Note: When external-speaker or headphone cables are attached to the audio connector, the internal
speaker, if present, is disabled. In most cases, if an audio adapter is installed in one of the expansion slots,
the audio function built into the system board is disabled; use the audio jacks on the adapter.
• Make sure that the program you are running is designed for use in the Windows operating system. If
the program is designed to run in DOS, the program does not use the Windows sound feature and must
be configured to use SoundBlaster Pro or SoundBlaster emulation.

Chapter 5. Troubleshooting and diagnostics

• Verify that the audio device drivers are correctly installed. See Windows help system for more information.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

An audio disc or AutoPlay-enabled disc does not automatically play when it is
inserted into a drive
Symptom: An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive
Action: See “CD problems” on page 38.

Sound comes from one external speaker only
Symptom: Sound comes from one external speaker only.
Actions:
• Ensure that the speaker cable is inserted completely into the connector on the computer.
• Make sure the cable that attaches the left speaker to the right speaker is securely connected.
• Double-click the speaker icon in the Windows notification area. A master volume-control window opens.
Verify that the Balance settings are set correctly.
If these actions do not correct the problem, you might have a failing speaker. Have the speaker serviced. If
you need technical assistance, see “Lenovo Support Web site” on page 31.

No audio in DOS applications or games
Symptom: No audio in DOS applications or games
Actions:
• Make sure the DOS application or game is configured to use SoundBlaster Pro or SoundBlaster
emulation. Refer to the documentation that comes with the application or game for instructions on
setting sound-card settings.
• If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

CD problems
Select your symptom from the following list:
•
•
•

“An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a CD
drive” on page 38
“A CD or DVD does not work” on page 39
“Unable to use a startable (bootable) recovery medium, such as the Product Recovery CD, to start
your computer” on page 39

An audio disc or AutoPlay-enabled disc does not automatically play when it is
inserted into a CD drive
Symptom: An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into
a CD drive.
Actions:
• If you have multiple CD or DVD drives installed (or a combination of CD and DVD drives), try inserting the
disc into the other drive. In some cases, only one of the drives is connected to the audio subsystem.
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ThinkCentre M93zHardware Maintenance Manual

• If you are using the Windows 7 operating system, follow the action for “A CD or DVD does not work”
on page 39.
If this does not correct the problem, follow the action for “A CD or DVD does not work” on page 39.

A CD or DVD does not work
Symptom: A CD or DVD does not work.
Actions:
• Verify that the disc is inserted correctly, with its label up.
• Make sure that the disc you are using is clean. To remove dust or fingerprints, wipe the disc clean with a
soft cloth from the center to the outside. Wiping a disc in a circular motion might cause loss of data.
• Verify that the disc you are using is not scratched or damaged. Try inserting another disc that you know
is good. If you cannot read from a known-good disc, you might have a problem with your CD or DVD
drive or the cabling to your CD or DVD drive. Make sure that the power cable and signal cable are
securely connected to the drive.

Unable to use a startable (bootable) recovery medium, such as the Product Recovery
CD, to start your computer
Symptom: Unable to use a startable (bootable) recovery medium, such as the Product Recovery CD,
to start your computer.
Action: Make sure that the CD or DVD drive is in the startup sequence before the hard disk drive. Refer
to your “Selecting or changing the startup device sequence” on page 58 for information on viewing and
changing the startup sequence. Note that on some models the startup sequence is permanently set and
cannot be changed.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

DVD problems
Select your symptom from the following list:
•

“Black screen instead of DVD video” on page 39

•

“DVD movie will not play” on page 40

•

“No audio or intermittent audio while playing DVD movie” on page 40

•

“Playback is very slow or choppy” on page 40

•

“Invalid disc or no disc found message” on page 40

Black screen instead of DVD video
Symptom: Black screen instead of DVD video
Actions:
• Restart the DVD player program.
• Close any open files, turn off the computer, and then restart the computer.
• Try a lower screen resolution or color depth.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Chapter 5. Troubleshooting and diagnostics

DVD movie will not play
Symptom: DVD movie will not play.
Actions:
• Make sure that the disc surface is clean and not scratched.
• Check the disc or package for regional coding. You might need to purchase a disc with coding for
the region where you are using your computer.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

No audio or intermittent audio while playing DVD movie
Symptom: No audio or intermittent audio while playing DVD movie.
Actions:
• Check the volume control settings on your computer and on your speakers.
• Make sure that the disc surface is clean and not scratched.
• Check all cable connections to and from the speakers.
• Use the DVD menu for the video to select a different audio track.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Playback is very slow or choppy
Symptom: Playback is very slow or choppy.
Actions:
• Disable any background programs, such as AntiVirus or Desktop Themes.
• Ensure that video resolution is set to less than 1152 x 864.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Invalid disc or no disc found message
Symptom: Invalid disc or no disc found message
Actions:
• Ensure that a DVD disc is in the drive with the shiny side of the disc facing down.
• Ensure that video resolution is set to less than 1152 x 864.
• On computers that have a CD-ROM or CD-RW drive in addition to a DVD-ROM drive, make sure that the
DVD disc is in the drive labeled “DVD”.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Intermittent problems
Symptom: A problem occurs only occasionally and is difficult to repeat.

ThinkCentre M93zHardware Maintenance Manual

Actions:
• Verify that all cables and cords are securely connected to the computer and attached devices.
• Verify that when the computer is on, the fan grill is not blocked (there is air flow around the grill), and the
fans are working. If airflow is blocked or the fans are not working, the computer might overheat.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Hard disk drive problems
Select your symptom from the following list:
•

“Some or all hard disk drives missing from the Setup Utility program” on page 41

•

“"No Operating System Found" message or the system not starting from the correct hard disk drive”
on page 41

Some or all hard disk drives missing from the Setup Utility program
Symptom: Some or all hard disk drives missing from the Setup Utility program
Actions:
• Ensure that all hard disk drive signal cables and power cables are connected correctly.
• Ensure that your computer is configured correctly to support the hard disk drives.
– If your computer is installed with five SATA hard disk drives, ensure that the SATA hard disk drive
enablement module (one to five hard disk drives) is installed.
– If your computer is installed with SAS hard disk drives, ensure that the SAS hard disk drive enablement
module (one to five hard disk drives) or the LSI MegaRAID SAS adapter is installed.
If these actions do not correct the problem, run the diagnostic program Lenovo Solution Center. See “Lenovo
Solution Center” on page 53. If you need technical assistance, see “Lenovo Support Web site” on page 31.

"No Operating System Found" message or the system not starting from the correct
hard disk drive
Symptom: "No Operating System Found" message or the system not starting from the correct hard disk drive
Actions:
• Ensure that all hard disk drive signal cables and power cables are connected correctly.
• Ensure that the hard disk drive your computer starts from is listed as the first startup device in the Setup
Utility program. Refer to “Selecting a startup device” on page 58.
Note: In rare cases, the hard disk drive with the operating system might get corrupted or damaged. In such
cases, you might need to replace the hard disk drive.
If these actions do not correct the problem, run the diagnostic program Lenovo Solution Center. See “Lenovo
Solution Center” on page 53. If you need technical assistance, see “Lenovo Support Web site” on page 31.

Keyboard, mouse, or pointing device problems
Select your symptom from the following list:
•

“All or some keys on the keyboard do not work” on page 42

•

“The mouse or pointing device does not work” on page 42

Chapter 5. Troubleshooting and diagnostics

•

“The pointer on the screen does not move smoothly with the mouse” on page 43

•

“The fingerprint reader does not work” on page 43

•

“The wireless keyboard does not work” on page 43

All or some keys on the keyboard do not work
Symptom: All or some keys on the keyboard do not work.
Actions:
• Verify that the keyboard cable is securely connected to the correct connector on the computer.
• If you are using an Enhanced Performance USB keyboard and one or more of the Rapid Access buttons
are the only keys that are not working, these buttons might have been disabled or have not been assigned
to a function. Use the help system in the Enhanced Performance Customization Keyboard program to
help diagnose problems with the Rapid Access buttons.
To open the Enhanced Performance Customization Keyboard program, do one of the following:
– On the Windows 7 operating system, do the following:
1. Click Start ➙ Control Panel.
2. Click Hardware and Sound.
3. Click Devices and Printers.
4. Double-click USB Enhanced Performance Keyboard. The USB Enhanced Performance
Keyboard Customization program starts.
– On the Windows 8 operating system, do the following:
1. Open Control Panel.
2. Click Hardware and Sound.
3. Click Devices and Printers.
4. Double-click USB Enhanced Performance Keyboard. The USB Enhanced Performance
Keyboard Customization program starts.
If these actions do not correct the problem, have the computer and keyboard serviced. See “Lenovo
Support Web site” on page 31 for details.

The mouse or pointing device does not work
Symptom: The mouse or pointing device does not work.
Actions:
• Verify that the mouse or pointing-device cable is securely attached to the correct connector on the
computer. Depending on the type of mouse you have, the mouse cable will connect to either the
mouse, serial, or USB connector. Some keyboards have integrated USB connectors that can be used
for a USB mouse or pointing device.
• Verify that the device drivers for the mouse or pointing device are installed correctly.
• If you are using a USB keyboard or mouse, verify that the USB connectors are enabled in the BIOS
settings. See “Enabling or disabling a device” on page 57.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.
Optical mouse
This section provides instructions on how to clean an optical mouse.

ThinkCentre M93zHardware Maintenance Manual

An optical mouse uses a light-emitting diode (LED) and an optical sensor to navigate the pointer. If the
pointer on the screen does not move smoothly with the optical mouse, you might need to clean the mouse.
To clean an optical mouse, do the following:
1. Turn off your computer.
2. Disconnect the mouse cable from the computer.
3. Turn the mouse upside down to check the lens.
a. If there is a smudge on the lens, gently clean the area with a plain cotton-tipped swab.
b. If there is debris in the lens, gently blow the debris away from the area.
4. Check the surface on which you are using the mouse. If you have a very intricate picture or pattern
beneath the mouse, it may be difficult for the digital signal processor (DSP) to determine changes
in the mouse position.
5. Reconnect the mouse cable to the computer.
6. Turn your computer back on.

The pointer on the screen does not move smoothly with the mouse
Symptom: The pointer on the screen does not move smoothly with the mouse.
Action: Erratic movement of the mouse pointer is generally caused by a buildup of dirt, oils, and other
contaminants on the ball inside the mouse. Clean the mouse.

The fingerprint reader does not work
Symptom: The fingerprint reader does not work.
Action: The following could cause the fingerprint reader not to operate properly:
• Not enrolling your fingerprint correctly.
• Scratching the surface of the reader with a hard, pointed object.
• Scraping the surface of the reader with your nail or anything hard.
• Using or touching the reader with a dirty finger.
• The surface of your finger is very different from when you enrolled your fingerprint.

The wireless keyboard does not work
Symptom: The wireless keyboard does not work.
Action: If the Transceiver Communications LED is on and the wireless Keyboard does not work, restart your
computer. If restarting your computer does not solve the problem, verify that the following conditions are met:
• The batteries are properly installed.
• The batteries still retain their current.
• The wireless Keyboard is located less than ten meters away from the transceiver.
• The transceiver is fully installed.
Action: If the Transceiver Communications LED is not on, reconnect the transceiver and the keyboard.

Monitor problems
Note: Many monitors have status-indicator lights and built-in controls for adjusting brightness, contrast,
width, height, and other picture adjustments. However, the controls vary from monitor type to monitor type.

Chapter 5. Troubleshooting and diagnostics

For information about the status lights and using the controls, refer to the documentation that comes
with your monitor.
Select your symptom from the following list:
•

“Wrong characters appear on the screen” on page 44

•

“The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity” on page 44

•

“The monitor works when you turn on the computer, but goes blank when you start some application
programs” on page 44

•

“The image appears to be flickering” on page 44

•

“The image is discolored” on page 45

Wrong characters appear on the screen
Symptom: Wrong characters appear on the screen.
Action: Have the computer serviced. For details, see “Lenovo Support Web site” on page 31.

The monitor works when you turn on the computer, but goes blank after some period
of computer inactivity
Symptom: The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity.
Action: The computer is probably set for energy savings with the power-management feature. If the
power-management feature is enabled, disabling it or changing the settings might solve the problem.
If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical
assistance, see “Lenovo Support Web site” on page 31.

The monitor works when you turn on the computer, but goes blank when you start
some application programs
Symptom: The monitor works when you turn on the computer, but goes blank when you start some
application programs.
Actions:
• Ensure that the monitor signal cable is securely connected to the monitor and the monitor connector on
the computer. A loose cable can cause intermittent problems.
• Verify that the necessary device drivers for the application programs are installed. Refer to the
documentation for the affected application program to see if device drivers are required.
If these actions do not correct the problem, run the Lenovo Solution Center program. If you need technical
assistance, see “Lenovo Support Web site” on page 31.

The image appears to be flickering
Symptom: The image appears to be flickering.
Actions:
• The monitor might be operating in a low-refresh rate display mode. Set the monitor to the highest,
noninterlaced refresh rate supported by your monitor and the video controller in your computer.

ThinkCentre M93zHardware Maintenance Manual

Attention: Using a resolution or refresh rate that is not supported by your monitor might damage it.
Check the documentation that comes with your monitor to verify the supported refresh rates.
• The monitor might be affected by interference from nearby equipment. Magnetic fields around other
devices, such as transformers, appliances, fluorescent lights, and other monitors might be causing the
problem. Move fluorescent desk lighting or any equipment that produces magnetic fields farther away
from the monitor. If this does not correct the problem, do the following:
1. Turn off the monitor. (Moving a color monitor while it is turned on might cause screen discoloration.)
2. Adjust the placement of the monitor and other devices so that they are at least 305 mm (12 inches)
apart.
3. Turn on the monitor.
• You can reset the refresh rate through your operating system Control Panel:
On the Windows 7 operating system, click Start ➙ Control Panel ➙ Hardware and Sound ➙ Adjust
screen resolution ➙ Advanced Settings. Then click the Monitor tab and select a new refresh rate.
On the Windows 8 operating system, open Control Panel and click Hardware and Sound ➙ Adjust
screen resolution ➙ Advanced Settings. Then click the Monitor tab and select a new refresh rate.
• See your operating system documentation or help for further information on monitor settings.
If these actions do not correct the problem, your monitor might need service. See “Lenovo Support Web
site” on page 31 for details.

The image is discolored
Symptom: The image is discolored.
Action: The monitor might be affected by interference from nearby equipment. Magnetic fields around other
devices, such as transformers, appliances, fluorescent lights, and other monitors might be causing the
problem. Move fluorescent desk lighting or any equipment that produces magnetic fields further away from
the monitor. If this does not correct the problem, do the following:
1. Turn off the monitor. (Moving a color monitor while it is turned on might cause screen discoloration.)
2. Adjust the placement of the monitor and other devices so that they are at least 305 mm (12 inches) apart.
3. Turn on the monitor.
If these actions do not correct the problem, your monitor might need service. See “Lenovo Support Web
site” on page 31 for details.

Networking problems
The following are the most common networking problems. Select your networking problem from the
following list:
•

“Ethernet problems” on page 45

•

“A wireless LAN problem” on page 47

•

“A wireless WAN problem” on page 47

•

“Bluetooth problems” on page 48

Ethernet problems
For Ethernet problems, select your symptom from the following list:
•

“Your computer cannot connect to the network” on page 46

•

“The adapter stops working for no apparent reason” on page 46

Chapter 5. Troubleshooting and diagnostics

•

“If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails
or errors occur” on page 47

•

“If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead,
it connects at 100 Mbps” on page 47

Your computer cannot connect to the network
Symptom: Your computer cannot connect to the network.
Actions: Ensure that:
• The cable is installed properly.
The network cable must be securely connected to both the Ethernet connector of your computer and
the RJ45 connector of the hub. The maximum allowable distance from the computer to hub is 100
meters. If the cable is connected and the distance is within acceptable limits but the problem persists, try
a different cable.
• The cable is installed properly.
• You are using the correct device driver.
On the Windows 7 operating system, do the following:
1. Click Start ➙ Control Panel.
2. Click Hardware and Sound.
3. Click Device Manager. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
4. If an exclamation mark is displayed next to an adapter name under Network adapters, you might
not be using the correct driver or the driver is not enabled. To update the driver, right-click the
highlighted adapter.
5. Click Update Driver Software, and then follow the instructions on the screen.
On the Windows 8 operating system, do the following:
1. Open Control Panel.
2. Click Hardware and Sound.
3. Click Device Manager. If you are prompted for an administrator password or confirmation, type the
password or provide confirmation.
4. If an exclamation mark is displayed next to an adapter name under Network adapters, you might
not be using the correct driver or the driver is not enabled. To update the driver, right-click the
highlighted adapter.
5. Click Update Driver Software, and then follow the instructions on the screen.
• The switch port and the adapter have the same duplex setting.
If you configured the adapter for full duplex, ensure that the switch port is also configured for full duplex.
Setting the wrong duplex mode can degrade performance, cause data loss, or result in lost connections.
• You have installed all networking software that is necessary for your network environment.
Check with your LAN administrator for the necessary networking software.
The adapter stops working for no apparent reason
Symptom: The adapter stops working for no apparent reason.
Action: The network driver files may be corrupt or missing. Update the driver by referring to the “Solution”
description for the procedure to make sure that the correct device driver is installed.

ThinkCentre M93zHardware Maintenance Manual

The Wake on LAN feature is not working
Symptom: The Wake on LAN (WOL) feature is not working.
Actions:
• Make sure that WOL is enabled in the BIOS Setup Utility program.
• If it is, check with your LAN administrator for the necessary settings.
If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection
fails or errors occur
Symptom: If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection
fails or errors occur.
Actions:
• Use Category 5 wiring and make sure that the network cable is securely connected.
• Connect to a 1000 BASE-T hub/switch (not 1000 BASE-X).
If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps. Instead,
it connects at 100 Mbps
Symptom: If your computer is a Gigabit Ethernet model, it cannot connect to the network at 1000 Mbps.
Instead, it connects at 100 Mbps.
Actions:
• Try another cable.
• Make sure that the link partner is set to auto-negotiate.
• Make sure that the switch is 802.3ab-compliant (gigabit over copper).

A wireless LAN problem
Symptom: You cannot connect using the built-in wireless networking card.
Actions:
• Make sure that your wireless LAN driver is the latest version. Check the Web site and verify the driver
version supported by Access Connections is the latest documented in the readme file.
• Make sure that your computer is within range of a wireless access point.
• Make sure that the wireless radio is enabled by double-clicking the Access Connections icon in the
Windows notification area.
Note: On the Windows 7 operating system, click Show hidden icons in the Windows notification
area. The Access Connections icon is displayed. For more information about the icon, see the Help in
Access Connections.
• Check Network Name (SSID), and your encryption information. Use Access Connections to verify this
case-sensitive information.

A wireless WAN problem
Message: Unauthorized WAN card is plugged in - Power off and remove the WAN card.
Action: The wide-area-network card (WAN card) is not supported on this computer. Remove it.
Note: Some computer models do not have a wireless WAN.

Chapter 5. Troubleshooting and diagnostics

Bluetooth problems
For Bluetooth problems, select your symptom from the following list:
•

“Sound does not come from the Bluetooth headphone” on page 48

•

“PIM items sent from the Windows 7 operating system cannot be received correctly” on page 48

Sound does not come from the Bluetooth headphone
Symptom: Sound does not come from the Bluetooth headset/headphone but comes from the local speaker
even though the headset/headphone is connected using Headset profile or AV profile.
Action: Do the following:
1. Exit the application that uses the sound device (for example, Windows Media Player).
2. Open the Control Panel by clicking Start ➙ Control Panel.
3. Click Hardware and Sound ➙ Sound.
4. Select the Playback tab.
5. If you are using Headset profile, select Bluetooth Hands-free Audio and click the Set Default button. If
you are using AV profile, select Stereo Audio and click the Set Default button.
6. Click OK to close the Sound window.
Note: Bluetooth is supported only on some computer models.
PIM items sent from the Windows 7 operating system cannot be received correctly
Symptom: Personal Information Manager (PIM) items sent from the Windows 7 operating system cannot be
received correctly into the address book of any other Bluetooth-enabled device.
Action: The Windows 7 operating system sends PIM items in XML format, but most Bluetooth-enabled
devices handle PIM items in vCard format. If another Bluetooth-enabled device can receive a file through
Bluetooth, a PIM item sent from the Windows 7 operating system might be saved as a file with the extension
.contact.

Option problems
Use this information to diagnose problems with Lenovo hardware options that do not have their own
troubleshooting information.
Select your symptom from the following list:
•

“An option that was just installed does not work” on page 48

•

“An option that previously worked does not work now” on page 49

An option that was just installed does not work
Symptom: An option that was just installed does not work.
Action: Verify that:
• The option is designed for your computer.
• You followed the installation instructions supplied with the option and the installation instructions provided
with your computer, and all option files (such as device drivers, if required) are installed correctly.
• You have not loosened other installed options or cables.
• If the option is an adapter, you have provided enough hardware resources for the adapter to function
correctly. See the documentation supplied with the adapter (as well as the documentation for any other
installed adapters) to determine the resources required for each adapter.

ThinkCentre M93zHardware Maintenance Manual

If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

An option that previously worked does not work now
Symptom: An option that previously worked does not work now.
Actions:
• Verify that all option hardware and cable connections are secure.
• If the option comes with its own test instructions, use those instructions to test the option.
• If the failing option is a SCSI option, verify that:
– The cables for all external SCSI options are connected correctly.
– The last option in each SCSI chain, or the end of the SCSI cable, is terminated correctly.
– All external SCSI options are turned on. External SCSI options must be turned on before the computer
is turned on. For more information, see your SCSI documentation.
• Verify that the option and any required device drivers are installed correctly.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Performance and lockup problems
Poor performance and lockup problems can be a result of any of the following:
•

“Insufficient free hard disk drive space” on page 49

•

“Excessive number of fragmented files” on page 50

•

“Insufficient memory” on page 51

Make a selection from the above list to find out more about the corrective actions you can take.

Insufficient free hard disk drive space
Symptom: Insufficient free hard disk drive space
The Windows operating system will slow down and might produce errors if the hard disk drive gets too full.
To check the amount of free space on the Windows 7 operating system, do the following:
1. Click Start ➙ Computer.
2. Right-click your C drive entry and then click Properties. The amount of free disk space is displayed.
To check the amount of free space on the Windows 8 operating system, do the following:
1. Open the Windows Explorer and click Computer.
2. Right-click your C drive entry and then click Properties. The amount of free disk space is displayed.
To free up disk space, do any of the following:
• Procedure 1
1. On the Windows 7 operating system, click Start ➙ Computer. On the Windows 8 operating system,
open the Windows Explorer and click Computer.
2. Right-click your C drive entry and then click Properties.
3. Click Disk Cleanup.

Chapter 5. Troubleshooting and diagnostics

4. A list of unnecessary file categories is displayed. Select each file category you want to delete,
and then click OK.
• Procedure 2
1. Open Control Panel.
2. Click Programs.
3. Click Turn Windows features on or off.
4. A list of optional Windows components is displayed. Follow the instructions on the screen.
• Procedure 3
1. On the Windows 7 operating system, click Start ➙ Computer. On the Windows 8 operating system,
open the Windows Explorer and click Computer.
2. Right-click your C drive entry and then click Properties.
3. Click Disk Cleanup.
4. Click Clean up system files.
5. Click the More Options tab.
6. In the Programs and Features area, click the Clean up button.
7. A list of installed programs is displayed. Select the program that you want to remove. Click
Uninstall/Change.
• Clean out your Inbox, Sent Items, and Deleted Items folders from your e-mail application. The folder
names and procedures vary depending on your e-mail application. If you need assistance, see the
help system for your e-mail application.

Excessive number of fragmented files
Symptom: Excessive number of fragmented files
Action: Run the Windows Disk Defragmenter program.
Note: Depending on the size of the hard disk drive and amount of data currently stored on the hard disk
drive, the disk-defragmentation process might take up to several hours to complete.
On the Windows 7 operating system, do the following:
1. Close any programs that are currently running and close any open windows.
2. Click Start ➙ Computer.
3. Right-click your C drive entry and then click Properties.
4. Click the Tools tab.
5. Click Defragment Now, then click Continue.
6. Click Defragment Now again to start a disk-defragmentation process.
On the Windows 8 operating system, do the following:
1. Close any programs that are currently running and close any open windows.
2. Open the Windows Explorer and click Computer.
3. Right-click your C drive entry and then click Properties.
4. Click the Tools tab.
5. Click Optimize.
6. Click Optimize again to start a disk-defragmentation process.

ThinkCentre M93zHardware Maintenance Manual

Insufficient memory
Symptom: Insufficient memory
In general, the more memory that is installed, the better the Windows operating system runs.
Action: Install additional memory. For information about purchasing memory, see “Lenovo Support Web
site” on page 31. For step-by-step instructions on installing memory, see “Installing or replacing a memory
module” on page 87.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Printer problems
Symptom: The printer does not work.
Actions: Verify that:
1. The printer is turned on and is online.
2. Paper is loaded correctly.
3. The printer signal cable is securely connected to the correct parallel, serial, or USB connector on the
computer.
Note: Non-IEEE-approved printer signal cables might cause unpredictable problems.
1. Any device drivers and other software that came with the printer are correctly installed.
2. You have assigned the printer port correctly in your operating system, application program, or BIOS
settings. For more information about BIOS settings, see Chapter 6 “Using the Setup Utility program”
on page 55.
If the problem persists, run the tests described in the documentation that comes with your printer. If you
cannot correct the problem, have the computer serviced. See “Lenovo Support Web site” on page 31.

Serial port problems
Use this information to troubleshoot the serial port and devices attached to the serial port.
Symptom: Serial port cannot be accessed.
Actions:
• Make sure the serial cable is securely connected to the serial port on the computer and to the serial
device. If the serial device has its own power cord, make sure it is attached to a properly grounded
electrical outlet.
• If the serial device has its own On/Off switch, make sure it is in the On position.
• If the serial device has an Online switch, make sure it is in the Online position.
• If the serial device is a printer, make sure paper is loaded correctly.
• Verify that any software supplied with the serial device is correctly installed. Refer to the documentation
for the serial-device option.
• Make sure that the serial-port adapter, if you added one, is properly installed and firmly seated.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 53 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 31.

Chapter 5. Troubleshooting and diagnostics

Software problems
Select your symptom from the following list:
•

“When using a sort feature, dates do not sort in the correct order” on page 52

•

“Software does not work as expected” on page 52

When using a sort feature, dates do not sort in the correct order
Symptom: When using a sort feature, dates do not sort in the correct order.
Action: Some software developed before the year 2000 used only the last two digits of a year to sort
dates, always assuming the first two digits were 19. Consequently, these programs sort dates out of order.
Check with your software manufacturer to see if any updates are available. Many software manufacturers
make updates available from the World Wide Web.

Software does not work as expected
Symptom: Software does not work as expected.
Actions:
• Most software programs have built-in help systems that provide instructions for most tasks. If you are
having difficulty performing a specific task within a software program, refer to the help system for that
program. Help systems are typically accessible from a menu or button in the program, and frequently
from the F1 key.
• If you are having difficulty with the Windows operating system or one of its components, refer to the
Windows help system. It is accessible from the Windows Start menu.
• To determine if problems are caused by newly installed software, verify that:
– Your computer has the minimum memory requirements needed to use the software. See the
information supplied with the software to verify memory requirements. (If you just installed an adapter
or memory, you might have a memory-address conflict.)
– The software is designed to operate on your computer.
– Other software works on your computer.
– The software you are using works correctly on another computer.
• If you received any error messages while using the software program, see the printed documentation
supplied with the software or the help system for that software for a description of the messages and
solutions to the problem.
• Check with your software manufacturer to see if any updates are available. Many software manufacturers
make updates available from the World Wide Web.
• If the software program used to work correctly, but does not work correctly now, do the following:
– On the Windows 7 operating system, click Start ➙ Control Panel ➙ System and Security ➙ System
➙ System Protection ➙ System Restore. Then, follow the instructions on the screen.
– On the Windows 8 operating system, open Control Panel and click System and Security ➙ System ➙
System Protection ➙ System Restore. Then, follow the instructions on the screen.
• If you are unable to resolve the problem through other methods, uninstall the software program and
reinstall it.
If these actions do not correct the problem, you might need technical assistance. Contact your software
manufacturer or see “Lenovo Support Web site” on page 31 for details.

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USB problems
Symptom: The USB connectors cannot be accessed.
Actions:
• Make sure the USB cable is securely connected to the USB connector and to the USB device. If the USB
device has its own power cord, make sure it is attached to a properly grounded electrical outlet.
• If the USB device has its own On/Off switch, make sure it is in the On position.
• If the USB device has an Online switch, make sure it is in the Online position.
• If the USB device is a printer, make sure paper is loaded correctly.
• Make sure any device drivers or other software supplied with the USB device is correctly installed.
Refer to the documentation for the USB device.
• Reset the device by detaching and reattaching the USB connector.
If these actions do not correct the problem, run the diagnostic programs to test the USB connector (see
“Lenovo Solution Center” on page 53 for instructions). If the USB device came with its own diagnostics,
run those diagnostics against the USB device. If you need technical assistance, see “Lenovo Support
Web site” on page 31.

Diagnostics
The diagnostic program is used to test hardware components of your computer. The diagnostic program can
also report operating-system-controlled settings that interfere with the correct operation of your computer.
You can use the preinstalled diagnostic program to diagnose computer problems, if your computer is
running the Windows operating system.
Notes:
1. Your computer is preinstalled with the Lenovo Solution Center program for diagnostic purposes. For
more information about the Lenovo Solution Center program, see “Lenovo Solution Center” on page 53.
2. If you are unable to isolate and repair the problem yourself after running the diagnostic program, save
and print the log files created by the diagnostic program. You will need the log files when you speak to a
Lenovo technical support representative.

Lenovo Solution Center
The Lenovo Solution Center program enables you to troubleshoot and resolve computer problems. It
combines diagnostic tests, system information collection, security status, and support information, along
with hints and tips for maximum system performance.
Notes:
• The Lenovo Solution Center program can be downloaded from http://www.lenovo.com/diags.
• If you are using other Windows operating system rather than Windows 7 and Windows 8, go to
http://www.lenovo.com/diags for the latest information on diagnostics for your computer.
To run the Lenovo Solution Center program, see “Lenovo programs” on page 30.
For additional information, refer to the Lenovo Solution Center help system.
Note: If you are unable to isolate and repair the problem yourself after running the program, save and print
the log files. You will need the log files when you speak to a Lenovo technical support representative.

Chapter 5. Troubleshooting and diagnostics

UEFI diagnostic program
A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and
internal storage devices, view system information, and check and recover bad sectors on internal storage
devices.
To run the UEFI diagnostic program, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Basic troubleshooting” on page
35. If an error code is displayed, go to Chapter 7 “Symptom-to-FRU index” on page 61 for error code
descriptions and troubleshooting hints.
2. Repeatedly press and release the F10 key when turning on the computer. The main screen of the
UEFI diagnostic program is displayed.
3. Follow the instructions on the screen to use the diagnostic program.
The options on the main screen are as follows:
Table 2. Items on the main screen of the UEFI diagnostic program
DIAGNOSTICS

TOOLS

• LCD test

• System information

• Memory - Quick test

• Recover bad sectors tool

• Memory - Extended test

• Generate configuration file

• Motherboard test

• Execute from configuration file

• PCI-e test

• Exit application

• Storage - Quick test

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Chapter 6. Using the Setup Utility program
The Setup Utility program is used to view and change the configuration settings of your computer, regardless
of which operating system you are using. However, the operating system settings might override any similar
settings in the Setup Utility program.

Starting the Setup Utility program
To start the Setup Utility program, do the following:
1. Make sure your computer is turned off.
2. Repeatedly press and release the F1 key when turning on the computer. When you hear multiple
beeps or see a logo screen, release the F1 key.
Note: If a Power-On Password or an Administrator Password has been set, the Setup Utility program
menu will not be displayed until you type the correct password. For more information, see “Using
passwords” on page 55.
When the POST detects that the hard disk drive has been removed from your computer or the memory
module size has decreased, an error message will be displayed when you start the computer and you will be
prompted to do one of the following:
• Press F1 to enter the Setup Utility program.
Note: After you enter the Setup Utility program, press F10 to save changes and exit the Setup Utility
program. Press Enter when prompted to confirm the exit. The error message will not be displayed again.
• Press F2 to bypass the error message and log in to the operating system.
Note: You have to enable the configuration change detection feature for the POST to detect the removal of
the hard disk drive. To enable the configuration change detection feature, do the following:
1. Start the Setup Utility program.
2. From the Setup Utility program main menu, select Security ➙ Configuration Change Detection,
and press Enter.
3. Select Enabled and press Enter.
4. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to confirm
the exit.

Viewing and changing settings
The Setup Utility program menu lists various items about the system configuration. To view or change
settings, start the Setup Utility program. See “Starting the Setup Utility program” on page 55. Then, follow
the instructions on the screen.
You can use either the keyboard or the mouse to navigate through BIOS menu choices. The keys used to
perform various tasks are displayed at the bottom of each screen.

Using passwords
By using the Setup Utility program, you can set passwords to prevent unauthorized access to your computer
and data. The following types of passwords are available:
• Power-On Password
© Copyright Lenovo 2013, 2014

• Administrator Password
• Hard Disk Password
You do not have to set any passwords to use your computer. However, using passwords improves
computing security. If you decide to set any passwords, read the following sections.

Password considerations
A password can be any combination of up to 64 alphabetic and numeric characters. For security reasons, it
is recommended to use a strong password that cannot be easily compromised. To set a strong password,
use the following guidelines:
• Have at least eight characters in length
• Contain at least one alphabetic character and one numeric character
• Setup Utility program and hard disk drive passwords are not case sensitive
• Not be your name or your user name
• Not be a common word or a common name
• Be significantly different from your previous passwords

Power-On Password
When a Power-On Password is set, you are prompted to type a valid password each time the computer is
turned on. The computer cannot be used until the valid password is typed in.

Administrator Password
Setting an Administrator Password deters unauthorized users from changing configuration settings. If you
are responsible for maintaining the configuration settings of several computers, you might want to set an
Administrator Password.
When an Administrator Password is set, you are prompted to type a valid password each time you try to
access the Setup Utility program. The Setup Utility program cannot be accessed until a valid password
is typed in.
If both the Power-On Password and Administrator Password are set, you can type either password. However,
you must use your Administrator Password to change any configuration settings.

Hard Disk Password
Setting a Hard Disk Password prevents unauthorized access to the data on the hard disk drive. When a
Hard Disk Password is set, you are prompted to type a valid password each time you try to access the
hard disk drive.
Notes:
• After you set a Hard Disk Password, your data on the hard disk drive is protected even if the hard disk
drive is removed from one computer and installed in another.
• If the Hard Disk Password is forgotten, there is no way to reset the password or recover data from the
hard disk drive.

Setting, changing, and deleting a password
To set, change, or delete a password, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.

ThinkCentre M93zHardware Maintenance Manual

2. From the Setup Utility program main menu, select Security.
3. Depending on the password type, select Set Power-On Password, Set Administrator Password, or
Hard Disk Password.
4. Follow the instructions on the right side of the screen to set, change, or delete a password.
Note: A password can be any combination of up to 64 alphabetic and numeric characters. For more
information, see “Password considerations” on page 56.

Erasing lost or forgotten passwords (clearing CMOS)
This section provides instructions on how to erase lost or forgotten passwords, such as a user password.
To erase a lost or forgotten password, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 84.
3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system
board” on page 74.
4. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and
pin 3).
5. Reinstall the computer cover and connect the power cord. See “Completing the parts replacement” on
page 126.
6. Turn on the computer and leave it on for approximately 10 seconds. Then, turn off the computer by
holding the power switch for approximately five seconds.
7. Repeat step 1 through step 2.
8. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
9. Reinstall the computer cover and connect the power cord. See “Completing the parts replacement” on
page 126.

Enabling or disabling a device
This section provides information on how to enable or disable user access to the following devices:
USB Setup

Use this option to enable or disable a USB connector. When a USB connector is
disabled, the device connected to the USB connector cannot be used.

SATA Controller

When this feature is set to Disable, all devices connected to the SATA connectors
(such as hard disk drives or the optical drive) are disabled and cannot be accessed.

To enable or disable a device, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Devices.
3. Depending on the device you want to enable or disable, do one of the following:
• Select USB Setup to enable or disable a USB device.
• Select ATA Drive Setup to enable or disable a SATA device.
4. Select the desired settings and press Enter.
5. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.

Chapter 6. Using the Setup Utility program

Selecting a startup device
If your computer does not start up from a device such as the disc or hard disk drive as expected, do one of
the following to select the startup device you want.

Selecting a temporary startup device
Use this procedure to select a temporary startup device.
Note: Not all discs and hard disk drives are bootable.
1. Turn off your computer.
2. Repeatedly press and release the F12 key when turning on the computer. When the Please select
boot device window displays, release the F12 key.
3. Select the desired startup device and press Enter. The computer will start up from the device you
selected.
Note: Selecting a startup device from the Please select boot device window does not permanently change
the startup sequence.

Selecting or changing the startup device sequence
To view or permanently change the configured startup device sequence, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Startup.
3. Select the devices for the Primary Startup Sequence, the Automatic Startup Sequence, and the Error
Startup Sequence. Read the information displayed on the right side of the screen.
4. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.

Enabling ErP LPS compliance mode
Lenovo computers meet the eco-design requirements of the ErP Lot 3 regulation. For more information, go
to:
http://www.lenovo.com/ecodeclaration
You can enable the energy-related products directive (ErP) lowest power state (LPS) compliance mode in the
Setup Utility program to reduce the consumption of electricity when your computer is in sleep or off mode.
To enable ErP LPS compliance mode in the Setup Utility program, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Power ➙ Enhanced Power Saving Mode, and
press Enter.
3. Select Enabled and press Enter.
4. From the Power menu, select Automatic Power On and press Enter.
5. Select Wake on Lan and press Enter.
6. Select Disabled and press Enter.
7. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to confirm
the exit.
Note: When ErP LPS compliance mode is enabled, you can wake up your computer by doing one of
the following:
58

ThinkCentre M93zHardware Maintenance Manual

• Pressing the power switch
• Enabling the wake up on alarm feature
The wake up on alarm feature enables your computer to wake up at a set time. To enable the wake
up on alarm feature, do the following:
1. Start the Setup Utility program.
2. From the Setup Utility program main menu, select Power ➙ Automatic Power On, and press Enter.
3. Select Wake Up on Alarm and press Enter. Then follow the instructions on the screen.
4. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to
confirm the exit.
• Enabling the after power loss feature
The after power loss feature enables your computer to wake up when the power supply resumes after a
sudden loss of electricity. To enable the after power loss feature, do the following:
1. Start the Setup Utility program.
2. From the Setup Utility program main menu, select Power ➙ After Power Loss, and press Enter.
3. Select Power On and press Enter.
4. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to
confirm the exit.

ICE performance mode
You can adjust the acoustic and thermal performance of your computer through the ICE Performance
Mode menu. Two choices are available:
• Better Acoustic Performance (default setting)
• Better Thermal Performance
By enabling Better Acoustic Performance, your computer will run with less noise at a normal thermal
level. By enabling Better Thermal Performance, your computer will run at a better thermal level with
normal acoustic performance.
To configure the ICE performance mode, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Power.
3. Select Intelligent Cooling Engine (ICE). The Intelligent Cooling Engine (ICE) window is displayed.
4. Select ICE Performance Mode. The ICE Performance Mode window is displayed.
5. Select Better Acoustic Performance or Better Thermal Performance as desired.
6. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.

ICE thermal alert
You can monitor the thermal function of your computer under critical thermal situations through the ICE
Thermal Alert menu. Two choices are available:
• Enabled (default setting)
• Disabled

Chapter 6. Using the Setup Utility program

After enabling the ICE thermal alert function, when critical thermal situations occur, such as malfunctioning
fans, abnormally high temperature, and poor cooling performances, an alert log will be written into the
Windows system log. The alert log can help you identify the thermal problems.
To configure the ICE thermal alert function, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Power.
3. Select Intelligent Cooling Engine (ICE). The Intelligent Cooling Engine (ICE) window is displayed.
4. Select ICE Thermal Alert. The ICE Thermal Alert window is displayed.
5. Select Enabled or Disabled as desired.
6. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.

Changing the BIOS settings before installing a new operating system
BIOS settings vary by operating system. Change the BIOS settings before installing a new operating system.
To change the BIOS settings, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Exit ➙ OS Optimized Default.
3. Depending on the operating system to be installed, do one of the following:
• To install the Windows 8 (64-bit) operating system, select Enabled.
• To install an operating system other than Windows 8 (64-bit), select Disabled.
4. Select Yes in the window displayed and press Enter to confirm your selection.
5. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.

Exiting the Setup Utility program
After you finish viewing or changing settings, press Esc to return to the Setup Utility program main menu.
You might have to press Esc several times. Do one of the following:
• If you want to save the new settings, press F10 to save changes and exit the Setup Utility program.
• If you do not want to save the settings, select Exit ➙ Discard Changes and Exit, and then press Enter.
When the Reset Without Saving window shows, select Yes, and then press Enter to exit the Setup
Utility program.
• If you want to return to the default settings, press F9 to load the default settings, and then press F10 to
save and exit the Setup Utility program.

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Chapter 7. Symptom-to-FRU index
The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.
Always begin with the Chapter 4 “General checkout” on page 33. You can use this index to help you decide
which FRUs are needed when servicing a computer. If you are unable to correct the problem using this
index, go to “Undetermined problems” on page 65.
Notes:
1. If you have both an error message and an incorrect audio response, diagnose the error message first.
2. If you cannot run the diagnostic tests or you get a diagnostic error message when running a test, but did receive a
POST error message, diagnose the POST error message first.
3. If you did not receive any error message, look for a description of your error symptoms in the first part of this index.

Hard disk drive boot error
A hard disk drive boot error can have the following causes.
Error

FRU/Action

The start-up drive is not in the boot sequence in
configuration.

Check the configuration and ensure the start-up drive is
in the boot sequence.

No operating system installed on the boot drive.

Install an operating system on the boot drive.

The boot sector on the startup drive is corrupted.

The drive must be formatted. Do the following:
1. Attempt to back up the data on the failing hard disk
drive.
2. Using the operating system programs, format the
hard disk drive.

The drive is defective.

Replace the hard disk drive.

Power Supply Problems
If you suspect a power problem, use the following procedures.
Check/Verify

FRU/Action

Check the following for proper installation.

Reseat connectors

• Power cord
• On/Off switch connector
• On/Off switch power supply connector
• System board power supply connectors
• Microprocessor(s) connection
Check the power cord for continuity.

Power cord

Check the power-on switch for continuity.

Power-on switch

Beep symptoms
Beep symptoms are tones or a series of tones separated by pauses (intervals without sound) during POST.

The following tables describes beep symptoms.
Beep Symptom

FRU/Action

2 short beeps CMOS setting error

Common error code, see the detail failure information in
“POST error codes” on page 62.

3 short and 1 long beeps DRAM memory error

Perform the following actions in order.
1. Make sure the memory module(s) are properly seated
in the connector(s).
2. Replace the memory module(s).
3. Replace the system board.

POST error codes
Each time you power-on the system, it performs a series of tests that check the operation of the system
and some options. This series of tests is called the Power-On Self-Test, or POST. POST does the following
operations.
• Checks some basic system-board operations
• Checks the memory operation
• Starts the video operation
• Verifies that the boot drive is working
If the POST detects a problem, an error message appears on the screen. A single problem can cause several
error messages to appear. When you correct the cause of the first error message, the other error messages
probably will not appear on the screen the next time you turn on the system.
Error code

POST Error Message

Description/Action

0135

Fan failure

The system might be overheating.
Press F10 to exit.
Note: If the problem is caused by the
microprocessor fan, press F10 will
not solve the problem.

0211

Keyboard not found

When there is no keyboard detected,
the error message will be displayed.

0164

Memory size decreased

Press F10 to exit.

1762

Configuration change has occurred

This error message is displayed when
a hard disk drive or optical drive
change has been made.
Press F10 to exit.

ThinkCentre M93zHardware Maintenance Manual

Error code

POST Error Message

Description/Action

1820

More than one external fingerprint
reader are attached. Power off and
remove all but the reader that you set
up within your main operating system.

If more than one external fingerprint
reader are connected to a computer,
this error message will be displayed
to inform you to remove all of the
fingerprint keyboards except the
one compatible with the fingerprint
application on your computer.

1962

No operating system found. Press
any key to repeat boot sequence.

This error occurs only after the POST
is completed.
Press any key to repeat boot
sequence.

Miscellaneous error conditions
Message/Symptom

FRU/Action

Changing display colors

Display/Monitor

Computer will not power-off. See “Hard disk drive boot
error” on page 61.

1. Power Switch
2. System Board
3. Riser card, if installed.

Computer will not RPL from server

1. Ensure that network is in startup sequence as first
device or first device after diskette.
2. Ensure that network adapter is enabled for RPL.
3. Network adapter (Advise network administrator of
new MAC address)

Computer will not perform a Wake On LAN (if applicable)

1. Check power supply and signal cable connections
to network adapter.
2. Ensure that the operating system settings are set to
enable Wake on LAN.
3. Ensure Wake On LAN feature is enabled in
Setup/Configuration (see “Starting the Setup Utility
program” on page 55)
4. Ensure network administrator is using correct MAC
address.
5. Ensure no interrupt or I/O address conflicts.
6. Network adapter (advise network administrator of
new MAC address)

Dead computer. See “Hard disk drive boot error” on page
61.

1. Power Supply

Diskette drive in-use light remains on or does not light
when drive is active.

1. Diskette Drive

2. System Board
2. System Board
3. Diskette Drive Cable
Note: Ensure that the LED switch under OSD menu is
enabled. To enable the LED switch, select OSD menu ➙
Advanced Settings ➙ LED Switch.

Blank screen except for flashing cursor.

1. System Board
2. Primary Hard Disk Drive
3. Hard Disk Drive Cable

Chapter 7. Symptom-to-FRU index

Message/Symptom
Incorrect memory size during POST

FRU/Action
1. Run the Memory tests.
2. Memory Module
3. System Board

"Insert a Diskette" icon appears with a known-good
diagnostics diskette in the first 3.5-inch diskette drive.

1. System Board
2. Diskette Drive Cable
3. Network Adapter

Intensity or color varies from left to right of characters
and color bars

1. Display
2. Video adapter (if present)
3. System Board

No power or fan not running

1. See “Hard disk drive boot error” on page 61.

Non-system disk or disk error-type message with a
known-good diagnostic diskette.

1. Diskette Drive
2. System Board
3. Diskette Drive Cable

Other display symptoms not listed above (including blank
or illegible display)

1. Display

Power-on indicator or hard disk drive in-use light not on,
but computer works correctly

1. Power switch/LED assembly

2. System Board

2. System Board
Note: Ensure that the LED switch under OSD menu is
enabled. To enable the LED switch, select OSD menu ➙
Advanced Settings ➙ LED Switch.

Program loads from the hard disk with a known-good
diagnostics diskette in the first 3.5-inch diskette drive

1. Run the Setup Utility program and check Startup
sequence.
2. Diskette Drive
3. Diskette Drive Cable
4. System Board
5. Power Supply

RPL computer cannot access programs from its own hard
disk.

1. If network administrator is using LCCM Hybrid RPL,
check startup sequence:
a. First device - network
b. Second device - hard disk
2. Hard disk drive

RPL computer does not RPL from server

1. Check startup sequence.
2. Check the network adapter LED status.

Serial port device failure (adapter port)

1. External Device Self-Test OK?
2. External Device
3. Cable
4. Alternate Adapter
5. System Board

Some or all keys on the keyboard do not work

1. Keyboard
2. Keyboard Cable
3. System Board

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Undetermined problems
This section provides instructions on how to find out the failing devices or adapters.
1. Power-off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
a. Any adapters
b. Diskette drive
c. External Cache
d. External Cache RAM
e. External devices (modem, printer, or mouse)
f.

Hard disk drive

g. Internal devices (card reader, Wi-Fi card, ExpressCard, camera, touch panel control board, rear
I/O board or cables)
h. Memory modules
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem continues, replace the system board.

Chapter 7. Symptom-to-FRU index

ThinkCentre M93zHardware Maintenance Manual

Chapter 8. Locations
This chapter introduces the locations of the computer hardware components.

Locating connectors, controls, and indicators on the front of your
computer
Figure 1 “Front connector, control, and indicator locations” on page 67 shows the locations of the
connectors, controls, and indicators on the front of your computer.

Figure 1. Front connector, control, and indicator locations
Table 3. In computer mode and monitor mode
1 Integrated microphones (optional)

8 Volume-down control (computer mode)

2 Ambient light sensor (optional)

9 Monitor mode / computer mode switch

3 Integrated camera activity indicator (optional)

10 Power button

4 Integrated camera shield control slider (optional)

11 Power-on indicator

5 Integrated camera (optional)

12 Hard disk drive activity indicator

Table 3. In computer mode and monitor mode (continued)
6 Microphone mute/unmute control (computer mode)

13 Microphone mute/unmute indicator

7 Volume-up control (computer mode)

Note: Indicators 3 , 11 , 12 , and 13 are visible only when they are lit.
Table 4. In On Screen Display (OSD)
6 OSD exit button

8 OSD right or brightness-down control

7 OSD left or brightness-up control

9 OSD enter button

Note: To display the OSD menu, press and hold the button 9 for three seconds. You can display and use
the OSD menu in both computer mode and monitor mode.

Using your computer in monitor mode
Your computer can work in either: computer mode or monitor mode. This section provides instructions
on how to use your computer in monitor mode.
To use your computer in monitor mode, you need to have a second computer. Connect one end of the
VGA cable to the VGA-in connector on the rear of your computer, and connect the other end to the VGA
connector on the second computer. Use the monitor mode / computer mode switch on the right side of your
computer to switch your computer between computer mode and monitor mode.
The following table introduces the buttons that you can use when your computer is working in monitor mode.
Icon name

OSD menu

Function description
Press and hold this button for three seconds to display
the OSD menu.

Cancel an operation or exit the OSD menu.
Cancel / Exit

Monitor mode / computer mode switch

Switch your computer between computer mode and
monitor mode.

Accessing the On Screen Display (OSD)
You can access the OSD in both computer mode and monitor mode. To access the OSD, press and hold
the OSD enter button for three seconds.
The following table shows each icon on the OSD main menu.
Layer 1 icon

Layer 1 icon name
Brightness/Contrast
Image Position
Image Setup
Image Properties

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Layer 1 icon

Layer 1 icon name
Options
Advanced Settings
Exit

Using the OSD menu
The following section introduces the icons that you can use in OSD.
• Brightness/Contrast
–

Brightness

: Adjusts the difference between light and dark areas.

– Contrast
•

: Adjusts the overall screen brightness.

Image Position
– Horizontal Position
– Vertical Position

: Moves the image left or right.
: Moves the image up or down.

• Image Setup
– Automatic
– Manual

: Optimizes the image (size, position, phase, and clock).
: Manually optimizes the image (phase and clock).

• Image Properties
– Color
– Scaling

: Adjusts the intensity of red, green, and blue.
: Expands the image to full screen.

• Options
– Information

: Displays the resolution, refresh rate, and product details.

– Menu Language
– Menu Position

: Adjusts the location of the menu.

– Factory Default
– Accessibility

: Changes the language of the menu.

: Resets the monitor to original settings.
: Changes the menu time-out settings.

• Advanced Settings
– Ctrl+Alt+Del: Displays the system restart menu.
– Debug Mode: Displays the debug information after the computer restarts (only for Lenovo trained
service personnel).
Note: By default, this function is disabled to ensure that your computer can work properly.
– LED Switch: Turns on or turns off the LEDs.
• Exit

: Exits the OSD menu.

Chapter 8. Locations

Locating connectors on the rear of your computer
Figure 2 “Rear connector locations” on page 70 shows the locations of the connectors on the rear of your
computer. Some connectors on the rear of your computer are color-coded to help you determine where to
connect the cables on your computer.

Figure 2. Rear connector locations
1 Optical drive (optional)

9 VGA-in connector

2 PS/2 mouse connector (optional)

10 USB 3.0 connectors (USB ports 3 to 6)

3 PS/2 keyboard connector (optional)

11 ExpressCard slot (optional)

4 Serial connector (optional)

12 Card reader slot (optional)

5 Power cord connector

13 USB 3.0 connector (USB port 2) (supporting USB
charging)

6 Security-lock slot

14 Headset connector (also known as combo audio
connector)

ThinkCentre M93zHardware Maintenance Manual

7 Ethernet connector

15 Microphone connector

16 USB 3.0 connector (USB port 1)

DisplayPort®-out

connector

Notes:
• The headset connector 14 supports a microphone-integrated headset and does not support a
conventional microphone.
• By default, the USB 3.0 connector 13 enables you to charge some mobile digital devices and
smartphones when your computer is in sleep mode, in hibernation mode, or turned off.
The card reader slot 12 is for 11-in-1 card readers, supporting the following cards:
• Extreme Digital (x-D) Picture Card (type H)
• Extreme Digital (x-D) Picture Card (type M)
• Memory Stick (MS)
• MS PRO
• MultiMediaCard (MMC)
• MultiMediaCard-mobile (MMC-mobile)
• MultiMediaCard-plus (MMC-plus)
• Reduced-Size MultiMediaCard (RS-MMC)
• Secure Digital (SD) card
• Secure Digital eXtended-Capacity (SDXC) card
• Secure Digital High-Capacity (SDHC) card

Locating major FRUs and CRUs
Figure 3 “Locating major FRUs and CRUs for models with the 23-inch display” on page 72 shows the
locations of the major FRUs and CRUs in the computer. To remove the computer cover, see “Removing the
computer cover” on page 84.

Chapter 8. Locations

5
6
3
4

Figure 3. Locating major FRUs and CRUs for models with the 23-inch display

ThinkCentre M93zHardware Maintenance Manual

The following table lists the major FRUs shown in Figure 3 “Locating major FRUs and CRUs for models with
the 23-inch display” on page 72 and identifies which FRUs are also self-service CRUs or optional-service
CRUs.
Notes:
• Self-service CRUs: These CRUs unplug or are secured by no more than two screws. Examples of
these types of CRUs include the keyboard, the mouse, any USB device, and the power cord. Other
self-service CRUs depending on product design might include memory modules, adapter cards, hard
disk drives, and optical drives.
• Optional-service CRUs: These CRUs are isolated parts within the computer and are concealed by an
access panel that is typically secured by more than two screws. Once the access panel is removed, the
specific CRU is visible.
Number

FRU description

Self-service CRU

Optional-service CRU

Frame stand or monitor stand (optional)

Yes

Thermal sensor

Yes

Heat sink

Yes

Battery

Wi-Fi card module (optional)

Microprocessor

Yes

Memory modules

Yes

Heat sink and fan assembly for graphics
processing unit (GPU) (optional)

Yes

Card reader (optional)

Yes

ExpressCard (optional)

Yes

mSATA solid-state drive (also can support mini
PCI Express x1 card function with limitation)

Yes

System board

Rear I/O assembly

Yes

Power supply assembly

Rear PS/2 connectors and serial port assembly
(optional)

Yes

WiFi antennas

Front bezel

Touch panel control board (optional)

Yes

Internal speaker

Frame foot (optional)

Yes

Touch panel control board (optional)

Yes

Internal speaker

Yes

Power switch and control button board

LCD panel

Hard disk drive

Yes

Optical drive (optional)

Yes

Converter board

Yes

Chapter 8. Locations

Number
28

FRU description
Microprocessor fan

Self-service CRU

Optional-service CRU

Video Electronics Standards Association
mount bracket

Integrated camera with microphone (optional)

Yes

Light sensor (optional)

Keyboard

Yes

Mouse

Yes

(VESA®)

Looking up FRU information
For detailed FRU information, such as the FRU part numbers and supported computer models, go to:
http:/www.lenovo.com/serviceparts-lookup

Locating parts on the system board
Figure 4 “System board part locations” on page 74 shows the locations of the parts on the system board.

Figure 4. System board part locations
1 Microprocessor

15 Rear I/O assembly slot

2 Clear Complementary Metal Oxide
Semiconductor (CMOS) /Recovery jumper

16 Front LED connector

ThinkCentre M93zHardware Maintenance Manual

3 Battery

17 Touch panel control board connector*

4 Mini PCI Express x1 card slot

18 Front control panel connector

5 Integrated camera connector

19 Serial connector

6 Light sensor connector*

20 Keyboard and mouse cable connector

7 Memory slots (2)

21 SATA power connector

8 Management Engine (ME) disabled jumper

22 SATA 3.0 connector (for connecting the hard disk drive)

9 Thermal sensor connector

23 Converter board power connector

10 Card reader connector

24 SATA 3.0 connector (for connecting the optical drive, the
secondary hard disk drive, or the secondary solid-state drive)

11 Internal speaker connector

25 GPU fan connector*

12 ExpressCard connector*

26 14-pin power connector

13 Display connector

27 Microprocessor fan connector

14 mSATA solid-state drive slot (also can support
mini PCI Express x1 card function with limitation)

Note: * denotes that the components connecting to 6 , 12 , 17 , and 25 are only available in some models.

Chapter 8. Locations

Adjusting the frame stand
Your computer might come with a frame stand that you can use to adjust the computer to your comfortable
position. Pull the stand open and adjust the position of the computer at an angle between 10° and 45°
as shown in the following illustration.
Note: The frame stand is available only in some models.
CAUTION:
Ensure that the angle is at least 10° from the vertical; otherwise, the computer might be unstable
and fall over.

Figure 5. Adjusting the frame stand

ThinkCentre M93zHardware Maintenance Manual

Adjusting the monitor stand
Your computer might come with a monitor stand that you can use to adjust the computer to your comfortable
position.
The following illustration shows that you can adjust the position of the computer at an angle of 5° to the
front and 45° to the rear.

Figure 6. Adjusting the vertical position of the computer to the front or to the rear

Chapter 8. Locations

The following illustration shows that you can adjust the height of the monitor stand within a length of 110.00
mm (4.33 inches).
Note: Computer height with the monitor stand: between 283.50 mm (11.16 inches) and 293.50 mm (11.56
inches)

Figure 7. Adjusting the height of the monitor stand

The following illustration shows that you can turn the computer at an angel of 45° to the left and 45°to the
right.

Figure 8. Turning the computer to the left or to the right

ThinkCentre M93zHardware Maintenance Manual

Machine type and model label
The machine type and model label identifies your computer. When you contact Lenovo for help, the machine
type and model information helps support technicians to identify your computer and provide faster service.
The following is a sample of the machine type and model label.

Figure 9. Machine type and model label

Chapter 8. Locations

ThinkCentre M93zHardware Maintenance Manual

Chapter 9. Replacing FRUs
This chapter provides instructions about removing or replacing major FRUs. Not all FRUs are documented.
Important
Before you replace any FRU, read Chapter 2 “Safety information” on page 3. These precautions and
guidelines will help you work safely.
FRU replacements are to be done by trained service technicians only.

Handling static-sensitive devices
Do not open the static-protective package containing the new part until the defective part has been removed
from the computer and you are ready to install the new part. Static electricity, although harmless to you, can
seriously damage computer components and parts.
When you handle parts and other computer components, take these precautions to avoid static-electricity
damage:
• Limit your movement. Movement can cause static electricity to build up around you.
• Always handle parts and other computer components carefully. Handle PCI cards, memory modules,
system boards, and microprocessors by the edges. Never touch any exposed circuitry.
• Prevent others from touching the parts and other computer components.
• Before you replace a new part, touch the static-protective package containing the part to a metal
expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This
reduces static electricity from the package and your body.
• When possible, remove the new part from the static-protective packaging, and install it directly in the
computer without setting the part down. When this is not possible, place the static-protective package
that the part came in on a smooth, level surface and place the part on it.
• Do not place the part on the computer cover or other metal surface.

Installing or replacing hardware
This section provides instructions on how to install or replace hardware for your computer. You can expand
the capabilities of your computer and maintain your computer by installing or replacing hardware.
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
Notes:
1. Use only computer parts provided by Lenovo.
2. When installing or replacing an option, use the appropriate instructions in this section along with the
instructions that come with the option.

Installing external options
You can connect external options to your computer, such as external speakers, a printer, or a scanner. For
some external options, you must install additional software in addition to making the physical connection.
When installing an external option, see “Locating connectors, controls, and indicators on the front of your
computer” on page 67 and “Locating connectors on the rear of your computer” on page 70 to identify the

required connector. Then, use the instructions that come with the option to help you make the connection
and install any software or device drivers that are required for the option.

Installing the monitor stand
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to install the monitor stand.
Notes:
• The monitor stand is available only in some models. If your computer comes with the monitor stand, the
instructions on how to remove the frame stand also apply to the removal of the monitor stand.
• The frame foot illustrated in the following instructions is available only on computers that come with the
frame stand. If you remove the frame stand and install the monitor stand, do not remove the frame foot.
To install the monitor stand, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. If your computer is installed with a frame stand, press the release button toward the top of the computer
and lift the frame stand off the computer.

Figure 10. Removing the frame stand

4. To install the monitor stand, align the two clips on the top of the monitor stand with the two holes in
the chassis, and then press the release button toward the top of the computer until the monitor stand
is secured in position.

ThinkCentre M93zHardware Maintenance Manual

Figure 11. Installing the monitor stand

5. After installing the monitor stand, pull up the computer to the vertical position and remove the monitor
stand lock to adjust the height of the monitor stand. The monitor stand has a height adjustment range of
110 millimeters (4.33 inches).

Chapter 9. Replacing FRUs

Figure 12. Removing the monitor stand lock

6. If needed, open the cable manager and route the cables connected to the computer through the cable
manager to keep your workspace neat.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Removing the computer cover
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to remove the computer cover.
CAUTION:
Before you open the computer cover, turn off the computer and wait several minutes until the
computer is cool.
To remove the computer cover, do the following:
1. Remove any media from the drives and turn off all attached devices and the computer.
2. Disconnect all power cords from electrical outlets.
3. Disconnect the power cords, Input/Output cables, and any other cables that are connected to the
computer. See “Locating connectors, controls, and indicators on the front of your computer” on page
67 and “Locating connectors on the rear of your computer” on page 70.
4. Remove any locking device that secures the computer cover, such as an a Kensington-style cable lock.

ThinkCentre M93zHardware Maintenance Manual

5. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
6. Remove the frame stand. See “Installing the monitor stand” on page 82.
7. Press the two cover-release buttons on the computer cover as shown, slide the computer cover toward
the top of the computer, and then lift the computer cover up to remove it from the chassis.

Figure 13. Removing the computer cover

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Removing and reinstalling the frame foot
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to remove and reinstall the frame foot.
Note: The frame foot is available only in some models.
To remove and reinstall the frame foot, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the frame stand. See “Installing the monitor stand” on page 82.
4. Remove the computer cover. See “Removing the computer cover” on page 84.
5. Locate the frame foot. See “Locating major FRUs and CRUs” on page 71.
6. Remove the four screws that secure the frame foot to the chassis, and then slide the frame foot out of
the chassis.

Chapter 9. Replacing FRUs

Figure 14. Removing the frame foot

7. To reinstall the frame foot, align the four screw holes in the frame foot with those in the chassis, and then
install the screws to secure the frame foot to the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Removing and reinstalling the rear I/O assembly
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to remove and reinstall the rear I/O assembly.
To remove and reinstall the rear I/O assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the rear I/O assembly. See “Locating major FRUs and CRUs” on page 71.
5. Remove the screws 1 that secure the rear I/O assembly to the chassis. Then, lift the rear I/O assembly
upward to remove it from the rear I/O assembly slot.

ThinkCentre M93zHardware Maintenance Manual

Figure 15. Removing the rear I/O assembly

6. To reinstall the rear I/O assembly, align the screw holes in the rear I/O assembly with those in the
chassis. Then, press the top of the rear I/O assembly downward until it snaps into place.
7. Install the screws to secure the rear I/O assembly to the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Installing or replacing a memory module
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to install or replace a memory module.
Your computer has two slots for installing or replacing double data rate 3 small outline dual inline memory
modules (DDR3 SODIMMs) that provide up to a maximum of 16 GB system memory. When installing
or replacing a memory module, use 2 GB, 4 GB or 8 GB DDR3 SODIMMs in any combination up to
a maximum of 16 GB.
To install or replace a memory module, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the frame stand. See “Installing the monitor stand” on page 82.
4. Remove the computer cover. See “Removing the computer cover” on page 84.

Chapter 9. Replacing FRUs

5. Locate the memory modules. See “Locating major FRUs and CRUs” on page 71.
6. Open the retaining clips. If you are replacing an old memory module, open the retaining clips and
remove the memory module being replaced as shown.

Figure 16. Removing the memory module

7. Insert the notched end 2 of the new memory module into the slot 1 . Press the memory module
firmly and pivot the memory module until it snaps into place. Make sure that the memory module is
secured in the slot and does not move easily.

Figure 17. Installing a memory module

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the hard disk drive
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the hard disk drive.
To replace the hard disk drive, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
88

ThinkCentre M93zHardware Maintenance Manual

2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the hard disk drive in the computer. See “Locating major FRUs and CRUs” on page 71.
5. Press the clips of the hard disk drive bracket inward and then slide the hard disk drive to the left to
remove it from the chassis.

Figure 18. Removing the hard disk drive

6. Flex the sides of the hard disk drive bracket properly to remove the hard disk drive out of the bracket.
7. To install the new hard disk drive into the bracket, flex the bracket and align pin 1 , pin 2 , pin 3 , and pin
4 on the bracket with the corresponding holes in the hard disk drive.

Figure 19. Installing the hard disk drive into the bracket

8. Align the four pins on the hard disk drive bracket with the corresponding clips in the chassis and slide
the hard disk drive bracket to the right until it snaps into position.

Chapter 9. Replacing FRUs

Figure 20. Installing the hard disk drive

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the optical drive
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the optical drive.
Note: The optical drive is available only in some models.
To replace the optical drive, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the optical drive. See “Locating major FRUs and CRUs” on page 71.
5. Press the optical drive release button 1 toward the top of the computer and then slide the optical drive
out of the optical drive bay.

ThinkCentre M93zHardware Maintenance Manual

Figure 21. Removing the optical drive

6. To install a new optical drive, slide the new optical drive into the optical drive bay until it snaps into
position.

Figure 22. Installing the optical drive

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the converter board
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the converter board.
To replace the converter board, do the following:

Chapter 9. Replacing FRUs

1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Remove the optical drive. See “Replacing the optical drive” on page 90.
5. Locate the converter board. See “Locating major FRUs and CRUs” on page 71.
6. Remove the three screws 1 that secure the converter board to the chassis and disconnect the cables.
Then, lift the converter board off the chassis.

Figure 23. Removing the converter board

7. Connect the cables to the new converter board and align the three screw holes in the new converter
board with those in the chassis.
8. Install the three screws to secure the new converter board to the chassis.
9. Reinstall the optical drive. See “Replacing the optical drive” on page 90.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the heat sink
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the heat sink.
CAUTION:
The heat sink might be very hot. Before you open the computer cover, turn off the computer and
wait several minutes until the computer is cool.
To replace the heat sink, do the following:

ThinkCentre M93zHardware Maintenance Manual

1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the heat sink. See “Locating major FRUs and CRUs” on page 71.
5. Follow this sequence to remove the four screws that secure the heat sink to the system board:
a. Partially remove screw 1 , then fully remove screw 2 , and then fully remove screw 1 .
b. Partially remove screw 3 , then fully remove screw 4 , and then fully remove screw 3 .
Note: Carefully remove the four screws from the system board to avoid any possible damage to the
system board. The four screws cannot be removed from the heat sink.

Figure 24. Removing the heat sink

6. Remove the failing heat sink off the system board.
Notes:
a. You might have to gently twist the heat sink to free it from the microprocessor.
b. Do not touch the thermal grease while handling the heat sink.
7. Position the new heat sink on the system board so that the four screws are aligned with the
corresponding holes in the system board.
8. Follow this sequence to install the four screws to secure the heat sink, as shown in Figure 24 “Removing
the heat sink” on page 93.
a. Partially tighten screw 1 , then fully tighten screw 2 , and then fully tighten screw 1 .
b. Partially tighten screw 3 , then fully tighten screw 4 , and then fully tighten screw 3 .

Chapter 9. Replacing FRUs

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the microprocessor
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the microprocessor.
CAUTION:
The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off
the computer and wait several minutes until the computer is cool.
To replace the microprocessor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the system board and disconnect all cables connected to the system board. See “Locating
parts on the system board” on page 74.
5. Remove the heat sink to gain access to the microprocessor. See “Replacing the heat sink” on page 92.
Note: Place the heat sink on its side so that the thermal grease on the bottom of it does not get in
contact with anything.

ThinkCentre M93zHardware Maintenance Manual

6. Lift the small handle 1 and open the retainer 2 to access the microprocessor 3 .

Figure 25. Accessing the microprocessor

7. Lift the microprocessor straight up and out of the microprocessor socket.

Figure 26. Removing the microprocessor

Notes:
a. Your microprocessor and socket might look different from the one illustrated.

Chapter 9. Replacing FRUs

b. Note the orientation of the microprocessor in the socket. You can either look for the small triangle 1
on one corner of the microprocessor or note the orientation of the notches 2 on the microprocessor.
This is important when installing the new microprocessor on the system board.

c. Touch only the edges of the microprocessor. Do not touch the gold contacts on the bottom.
d. Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be
kept as clean as possible.
8. Make sure that the small handle is in the raised position and the microprocessor retainer is fully open.
9. Remove the protective cover that protects the gold contacts of the new microprocessor.
10. Hold the new microprocessor by its sides and align the small triangle on one corner of the new
microprocessor with the corresponding small triangle on one corner of the microprocessor socket.
11. Lower the new microprocessor straight down into the microprocessor socket on the system board.

Figure 27. Installing the microprocessor

12. Close the microprocessor retainer and lock it into position with the small handle to secure the new
microprocessor in the socket.
13. Reinstall the heat sink. See “Replacing the heat sink” on page 92.
14. Reconnect all cables that were disconnected from the system board.

ThinkCentre M93zHardware Maintenance Manual

What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to “Completing the parts replacement” on page 126.

Replacing the internal speakers
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the internal speakers.
To replace the internal speakers, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the internal speakers. See “Locating major FRUs and CRUs” on page 71.
5. Note the location of the internal speaker cable connection. Note the routing of the internal speaker
cables. Disconnect the internal speaker cables from the system board.
6. Remove the two screws that secure each internal speaker to the front bezel, and then remove the
internal speakers from the computer.

Figure 28. Removing the internal speakers

7. Route the new internal speaker cables and then position the new internal speakers on the front bezel so
that the two screw holes in each internal speaker align with those in the front bezel.
8. Reinstall the two screws to secure each of the internal speakers to the front bezel.
9. Reconnect the internal speaker cables to the system board. See “Locating parts on the system board”
on page 74.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Chapter 9. Replacing FRUs

Replacing the thermal sensor
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the thermal sensor.
To replace the thermal sensor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the thermal sensor. See “Locating major FRUs and CRUs” on page 71.
5. Note the routing of the thermal sensor cable, and then disconnect the thermal sensor cable from
the system board.
6. Remove the screws 1 that secure the VESA mount bracket, and then lift the VESA mount bracket
off the chassis.

Figure 29. Removing the VESA mount bracket

7. Press the thermal sensor clips inward to disengage the thermal sensor from the VESA mount bracket.
Note: The location of the thermal sensor in your computer might be slightly different from the illustration.

ThinkCentre M93zHardware Maintenance Manual

Figure 30. Removing the thermal sensor

8. To install a new thermal sensor, insert the new thermal sensor into the corresponding hole in the VESA
mount bracket, and then press the thermal sensor towards the VESA mount bracket until it snaps
into position.
Note: The location of the thermal sensor in your computer might be slightly different from the illustration.

Chapter 9. Replacing FRUs

Figure 31. Removing the thermal sensor

9. Connect the thermal sensor cable to the system board. See “Locating parts on the system board”
on page 74.
10. Align the screw holes in the VESA mount bracket with those in the chassis, and then install the screws
to secure the VESA mount bracket to the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the cover presence switch (also called intrusion switch)
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the cover presence switch.
To replace the cover presence switch, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.

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2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the cover presence switch. See “Locating major FRUs and CRUs” on page 71.
5. Note the routing of the cover presence switch cable, and then disconnect the cover presence switch
cable from the system board.
6. Remove the screws 1 that secure the VESA mount bracket, and then lift the VESA mount bracket
off the chassis.

Figure 32. Removing the VESA mount bracket

7. Press the cover presence switch clips inward to disengage the cover presence switch from the VESA
mount bracket.
Note: The location of the cover presence switch in your computer might be slightly different from the
illustration.

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Figure 33. Removing the cover presence switch

8. To install a new cover presence switch, insert the new cover presence switch into the corresponding
hole in the VESA mount bracket, and then press the cover presence switch towards the VESA mount
bracket until it snaps into position.
Note: The location of the cover presence switch in your computer might be slightly different from the
illustration.

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Figure 34. Removing the cover presence switch

9. Connect the cover presence switch cable to the system board. See “Locating parts on the system
board” on page 74.
10. Align the screw holes in the VESA mount bracket with those in the chassis, and then install the screws
to secure the VESA mount bracket to the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the integrated camera
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the integrated camera.
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Note: The integrated camera is available only in some models.
To replace the integrated camera, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the integrated camera. See “Locating major FRUs and CRUs” on page 71.
5. Note the routing of the integrated camera cable and then disconnect the integrated camera cable from
the system board. See “Locating parts on the system board” on page 74.
6. Remove the two screws 1 that secure the integrated camera to the front bezel, and then remove the
integrated camera from the computer.

Figure 35. Removing the integrated camera

7. Route the new integrated camera cable and then position the new integrated camera in place. Align the
two screw holes in the new integrated camera with those in the front bezel.
8. Reinstall the two screws to secure the new integrated camera to the front bezel.
9. Connect the integrated camera cable to the system board. See “Locating parts on the system board”
on page 74.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the WiFi card
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the WiFi card.

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Note: The WiFi card is available only in some models.
To replace the WI-FI card, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the WI-FI card on the system board. See “Locating parts on the system board” on page 74.
5. Disconnect the two cables from the WI-FI card, and then remove the screw that secures the WI-FI card
to the system board.

Figure 36. Removing the cables from the WI-FI card

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6. Carefully pivot the WI-FI card upward and lift the WI-FI card to remove it from the card slot.

Figure 37. Removing the WI-FI card

7. Insert the notched end of the new WI-FI card into the card slot. Press the new WI-FI card firmly, and
then pivot the WI-FI card to align the screw hole in the new WI-FI card with the one in the system board.
8. Install the screw to secure the new WI-FI card to the system board.
9. Connect the two cables to the new WI-FI card.
Note: In most areas of the world, Lenovo requires the return of the defective Field Replacement Units (FRUs).
Information about this will come with the new FRUs or will come a few days after you receive the new FRUs.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the ambient light sensor
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the ambient light sensor.
Note: The ambient light sensor is available only in some models.
To replace the ambient light sensor, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
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3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the ambient light sensor. See “Locating major FRUs and CRUs” on page 71.
5. Carefully remove the two screws 1 that secure the ambient light sensor, and then lift the ambient light
sensor out of the computer.

Figure 38. Removing the ambient light sensor

6. Disconnect the ambient light sensor cable from the system board.
7. Align the screw holes in the new ambient light sensor with the corresponding holes in the front bezel,
and then install the two screws to secure the ambient light sensor.
8. Connect the new ambient light sensor cable to the system board. See “Locating parts on the system
board” on page 74.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the card reader
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the card reader.
Note: The card reader is available only in some models.
To replace the card reader, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
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4. Locate the card reader. See “Locating major FRUs and CRUs” on page 71.
5. Disconnect the card reader cable from the card reader.
6. Remove the two screws 1 that secure the card reader, and then lift the card reader out of the computer.

Figure 39. Removing the card reader

7. Align the screw holes in the new card reader with those on the system board, and then install the
two screws to secure the card reader.
8. Connect the card reader cable to the new card reader.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the mSATA solid-state drive or mini PCI Express x1 card
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the mSATA solid-state drive or the mini PCI Express x1
card.
Notes:
• The mSATA solid-state drive or mini PCI Express x1 card is available only in some models.
• Your computer can support mini PCI Express x1 card function with limitation.
To replace the mSATA solid-state drive or mini PCI Express x1 card, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.

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2. Remove the computer cover. See “Removing the computer cover” on page 84.
3. Remove the rear I/O assembly. See “Removing and reinstalling the rear I/O assembly” on page 86.
4. Remove the screw 1 that secures the mSATA solid-state drive or mini PCI Express x1 card. Then,
remove the mSATA solid-state drive or mini PCI Express x1 card from the chassis.

Figure 40. Removing the screw that secures the mSATA solid-state drive or mini PCI Express x1 card

5. Carefully pivot the mSATA solid-state drive or mini PCI Express x1 card upward and lift the mSATA
solid-state drive or mini PCI Express x1 card to remove it from the card slot.

Figure 41. Removing the mSATA solid-state drive or mini PCI Express x1 card

6. Insert the notched end of the new mSATA solid-state drive or mini PCI Express x1 card into the card
slot. Press the new mSATA solid-state drive or mini PCI Express x1 card firmly, and then pivot the
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mSATA solid-state drive or mini PCI Express x1 card to align the screw in the new mSATA solid-state
drive or mini PCI Express x1 card with the one in the system board.
7. Install the screw to secure the new mSATA solid-state drive or mini PCI Express x1 card in place.
8. Reinstall the rear I/O assembly. See “Removing and reinstalling the rear I/O assembly” on page 86.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the ExpressCard
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the ExpressCard.
Note: The ExpressCard is available only in some models.
To replace the ExpressCard, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the ExpressCard. See “Locating major FRUs and CRUs” on page 71.
5. Carefully remove the four screws 1 that secure the ExpressCard to the system board, and then lift it
off the system board.

Figure 42. Removing the ExpressCard

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6. Connect the new ExpressCard to the ExpressCard connector on the system board. Align the screw
holes in the new ExpressCard with the corresponding holes in the system board, and then install the
four screws to secure the new ExpressCard to the system board.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the heat sink and fan assembly for GPU
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the heat sink and fan assembly for GPU.
Note: The heat sink and fan assembly for GPU is available only in models installed with the GPU.
CAUTION:
The heat sink and fan assembly for GPU might be very hot. Turn off the computer and wait three to
five minutes to let the computer cool before removing the computer cover.
To replace the heat sink and fan assembly for GPU, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the heat sink and fan assembly for GPU. See “Locating major FRUs and CRUs” on page 71.
5. Note the routing of the GPU fan cable, and then disconnect the GPU fan cable from the system board.
6. Follow this sequence to remove the four screws that secure the heat sink and fan assembly for GPU
to the system board:
a. Partially remove screw 1 , then fully remove screw 2 , and then fully remove screw 1 .
b. Partially remove screw 3 , then fully remove screw 4 , and then fully remove screw 3 .
Note: Carefully remove the four screws from the system board to avoid any possible damage to the
system board. The four screws cannot be removed from the heat sink and fan assembly for GPU.

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Figure 43. Removing the heat sink and fan assembly for GPU

7. Lift the failing heat sink and fan assembly for GPU off the system board.
Notes:
a. You might have to gently twist the heat sink and fan assembly for GPU to free it from the
microprocessor.
b. Do not touch the thermal grease while handling the heat sink and fan assembly for GPU.
8. Position the new heat sink and fan assembly for GPU on the system board so that the four screws are
aligned with the corresponding holes in the system board.
9. Follow this sequence to install the four screws to secure the heat sink and fan assembly for GPU, as
shown in Figure 43 “Removing the heat sink and fan assembly for GPU” on page 112.
a. Partially tighten screw 1 , then fully tighten screw 2 , and then fully tighten screw 1 .
b. Partially tighten screw 3 , then fully tighten screw 4 , and then fully tighten screw 3 .
10. Connect the GPU fan cable to the system board. See “Locating parts on the system board” on page 74.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the rear PS/2 connectors and serial port assembly
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the rear PS/2 connectors and serial port assembly.
Note: The rear PS/2 connectors and serial port assembly is available only in some models.
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To replace the rear PS/2 connectors and serial port assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the rear PS/2 connectors and serial port assembly. See “Locating major FRUs and CRUs”
on page 71.
5. Remove the rear I/O assembly and disconnect the cables of the rear PS/2 connectors and serial port
assembly from the system board. See “Removing and reinstalling the rear I/O assembly” on page 86.
6. Remove the screws 1 to disengage the rear PS/2 connectors and serial port assembly from the chassis.
Note: You might have to remove two screws to disengage the rear PS/2 connectors and serial port
assembly from the chassis.

Figure 44. Removing the rear PS/2 connectors and serial port assembly

7. Align the screw holes in the new rear PS/2 connectors and serial port assembly with the corresponding
screw hole in the chassis. Then, install the screws to secure the new rear PS/2 connectors and serial
port assembly to the chassis.
8. Connect the cables of the new rear PS/2 connectors and serial port assembly to the system board. See
“Locating parts on the system board” on page 74.
9. Reinstall the rear I/O assembly. See “Removing and reinstalling the rear I/O assembly” on page 86.
What to do next:
• To work with another piece of hardware, go to the appropriate section.

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• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the battery
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
Your computer has a special type of memory that maintains the date, time, and settings for built-in features,
such as parallel-port assignments (configuration). A battery keeps this information active when you turn
off the computer.
The battery normally requires no charging or maintenance throughout its life; however, no battery lasts
forever. If the battery fails, the date, time, and configuration information (including passwords) are lost. An
error message is displayed when you turn on the computer.
Refer to the “Lithium coin cell battery notice” in the ThinkCentre Safety, Warranty, and Setup Guide for
information about replacing and disposing of the battery.
To replace the battery, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the battery. See “Locating parts on the system board” on page 74.
5. Press the tab on the battery socket outward to remove the old battery.

Figure 45. Removing the old battery

6. Install a new battery.

Figure 46. Installing a new battery

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7. Reinstall the computer cover and connect the cables. See “Completing the parts replacement” on
page 126.
Note: When the computer is turned on for the first time after replacing the battery, an error message
might be displayed. This is normal after replacing the battery.
8. Turn on the computer and all attached devices.
9. Use the Setup Utility program to set the date, time, and any passwords. See Chapter 6 “Using the Setup
Utility program” on page 55.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the power supply assembly
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the power supply assembly.
To replace the power supply assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the power supply assembly. See “Locating major FRUs and CRUs” on page 71.
5. Remove the VESA mount bracket and disconnect the cables of the power supply assembly from the
system board. See “Replacing the thermal sensor” on page 98.

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6. Remove the screws 1 and 2 to disengage the power cord connector and the power supply assembly
from the chassis.

Figure 47. Removing the power supply assembly

7. Align the screw holes in the new power cord connector with the corresponding ones in the chassis.
Then, install the screws to secure the new power cord connector to the chassis.
8. Align the screw holes in the new power supply assembly with the corresponding ones in the chassis.
Then, install the screws to secure the new power supply assembly to the chassis.
9. Connect the cables of the new power supply assembly to the system board. See “Locating parts on the
system board” on page 74.
10. Reinstall the VESA mount bracket. See “Replacing the thermal sensor” on page 98.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the microprocessor fan
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the microprocessor fan.
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To replace the microprocessor fan, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the microprocessor fan. See “Locating major FRUs and CRUs” on page 71.
5. Remove the VESA mount bracket and disconnect the cables of the microprocessor fan from the system
board. See “Replacing the thermal sensor” on page 98.
6. Remove the screws 1 to disengage the microprocessor fan from the chassis.

Figure 48. Removing the microprocessor fan

7. Align the screw holes in the new microprocessor fan with the corresponding ones in the chassis. Then,
install the screws to secure the new microprocessor fan to the chassis.
8. Connect the cables of the new microprocessor fan to the system board. See “Locating parts on the
system board” on page 74.
9. Reinstall the VESA mount bracket. See “Replacing the thermal sensor” on page 98.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

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Replacing the LCD panel
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the LCD panel.
To replace the LCD panel, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the LCD panel. See “Locating major FRUs and CRUs” on page 71.
5. Remove the frame foot. See Removing and reinstalling the frame foot
6. Remove the screws that secure the LCD bracket to the front bezel.

Figure 49. Removing the LCD bracket

7. Disconnect the cables of the components secured to the front bezel from the system board. Then, lift
the LCD bracket off the front bezel.
8. Disconnect the LCD cables from the display connectors on the system board and the converter board.
See “Locating parts on the system board” on page 74.
9. Connect the new LCD cables to the display connectors on the system board and the converter board.
See “Locating parts on the system board” on page 74.
10. Position the LCD bracket over the front bezel, ensure that the screw holes in the LCD bracket align with
the mounting stands in the front bezel.

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11. Reinstall all the screws to secure the LCD bracket to the front bezel.

Figure 50. Reinstalling the LCD bracket

Attention: Do not overtighten the screws. Overtightening the screws might damage the LCD panel.
12. Reconnect the cables of the components secured to the front bezel to the system board.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the system board
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
CAUTION:
The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off
the computer and wait several minutes until the computer is cool.
This section provides instructions on how to replace the system board.
To replace the system board, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.

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4. Locate the system board. See “Locating major FRUs and CRUs” on page 71.
5. Remove the rear I/O assembly to gain access to the system board. See “Removing and reinstalling
the rear I/O assembly” on page 86.
6. Remove the heat sink. See “Replacing the heat sink” on page 92.
Note: Place the heat sink on its side so that the thermal grease on the bottom of it does not get in
contact with anything.
7. Remove the microprocessor. See “Replacing the microprocessor” on page 94.
8. Remove the memory modules. See “Installing or replacing a memory module” on page 87.
9. Remove the heat sink and fan assembly for GPU if your computer has one. See “Replacing the heat
sink and fan assembly for GPU” on page 111.
10. Remove the card reader if your computer has one. See “Replacing the card reader” on page 107.
11. Remove the ExpressCard if your computer has one. See “Replacing the ExpressCard” on page 110.
12. Remove the WiFi card if your computer has one. See “Replacing the WiFi card” on page 104.
13. Note the locations of all cables connected to the system board and disconnect all cables. See “Locating
parts on the system board” on page 74.
14. Follow the sequence to remove the screws 1 to 7 that secure the system board to the chassis. Then,
carefully lift the system board out of the chassis.

Figure 51. Removing the system board

15. Place the new system board into the chassis and align the screw holes with the mounting stands in
the chassis.
16. Follow the sequence to reinstall the screws 1 to 7 to secure the system board to the chassis.

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Figure 52. Reinstalling the system board

17. Reinstall the heat sink and fan assembly for GPU if your computer has one. See “Replacing the heat
sink and fan assembly for GPU” on page 111.
18. Reinstall the card reader if your computer has one. See “Replacing the card reader” on page 107.
19. Reinstall the ExpressCard if your computer has one. See “Replacing the ExpressCard” on page 110.
20. Reinstall the WiFi card if your computer has one. See “Replacing the WiFi card” on page 104.
21. Reinstall the memory modules. See “Installing or replacing a memory module” on page 87.
22. Reinstall the microprocessor. See “Replacing the microprocessor” on page 94.
23. Reinstall the heat sink. See “Replacing the heat sink” on page 92.
24. Reinstall the rear I/O assembly. See “Removing and reinstalling the rear I/O assembly” on page 86.
25. Reconnect all cables that were disconnected from the system board. See “Locating parts on the
system board” on page 74.
26. Go to “Completing the parts replacement” on page 126.
The failing system board must be returned with a microprocessor socket cover to protect the pins during
shipping and handling.
To install the microprocessor socket cover, do the following:
1. Release the lever securing the microprocessor retainer and open the retainer to access the
microprocessor.
2. Grasp the microprocessor on the sides and lift it straight up and out of the socket. Do not touch the
contacts on the microprocessor socket.
3. Close the microprocessor retainer, and then lower the lever to secure the retainer. Ensure that the
lever is locked into position.

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4. Note the orientation of the socket cover, and install one side of the socket cover into the microprocessor
socket.

Figure 53. Installing one side of the socket cover into the microprocessor socket

Note: Your microprocessor socket and cover might look slightly different from the illustration.
5. Carefully press the other side of the socket cover downward until the socket cover snaps into position.
6. Carefully check the four corners of the socket cover to make sure that the cover is secured in the
microprocessor socket.
7. Follow any additional instructions included with the replacement part you received.

Replacing the touch panel control boards
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the touch panel control boards.
Note: The multi-touch boards are available only in some models.
To replace the touch panel control boards, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the touch panel control boards. See “Locating major FRUs and CRUs” on page 71.
5. Remove the LCD panel. See “Replacing the LCD panel” on page 118.

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6. Remove the screws 1 and disconnect the touch panel control board cables from the touch panel
control boards to disengage the touch panel control boards from the chassis.

Figure 54. Removing the touch panel control boards

7. Connect the touch panel control board cables to the new touch panel control boards.
8. Reinstall the LCD panel. See “Replacing the LCD panel” on page 118.
9. Align the screw holes in the new touch panel control boards with the corresponding ones in the chassis.
Then, install the screws to secure the new touch panel control boards to the chassis.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the power switch and control button board
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the power switch and control button board.
To replace the power switch and control button board, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Locate the power switch and control button board. See “Locating major FRUs and CRUs” on page 71.
5. Note the power switch and control button board cable routing and disconnect the cable from the system
board. See “Locating parts on the system board” on page 74.

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6. Remove the LCD bracket. See “Replacing the LCD panel” on page 118.
7. Remove the screws 1 to disengage the power switch and control button board from the front bezel.

Figure 55. Removing the power switch and control button board

8. Align the screw holes in the new power switch and control button board with the corresponding ones in
the front bezel. Then, install the screws to secure the new power switch and control button board to
the front bezel.
9. Connect the new power switch and control button board cable to the system board. See “Locating
parts on the system board” on page 74.
10. Reinstall the LCD bracket. See “Replacing the LCD panel” on page 118.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Replacing the WiFi antennas
Attention: Do not open your computer or attempt any repair before reading and understanding “Important
Safety Information” on page 1.
This section provides instructions on how to replace the WiFi antennas.
Note: The WiFi antennas are available only in some models.
To replace the WiFi antennas, do the following:

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1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
3. Remove the computer cover. See “Removing the computer cover” on page 84.
4. Remove the rear I/O assembly. See “Removing and reinstalling the rear I/O assembly” on page 86.
5. Locate the WiFi antennas and the WiFi card. See “Locating major FRUs and CRUs” on page 71.
6. Note the cable routing of the WiFi antennas and disconnect the WiFi antennas cables from the WiFi
card. Then, remove the WiFi antennas from the chassis.
7. Peel off the paper that protects the stickers on the new WiFi antennas.

Figure 56. Peeling off the paper that protects the stickers

8. Note the length of the new WiFi antennas cables and stick the new WiFi antennas to the chassis as
shown. Then, connect the two cables of the new WiFi antennas to the WiFi card.

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Figure 57. Installing the WiFi antennas

Notes:
• The black cable should be connected to the lower WiFi card connector MAIN. The grey cable should
be connected to the upper WiFi card connector AUX.
• Ensure that the WiFi cables are routed correctly. Keep the WiFi cables clear of the hinges and sides
of the computer chassis to avoid interference with reinstalling the computer cover.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 126.

Completing the parts replacement
After completing the installation or replacement for all parts, you need to reinstall the computer cover and
reconnect cables. Depending on the parts you installed or replaced, you might need to confirm the updated
information in the Setup Utility program. Refer to Chapter 6 “Using the Setup Utility program” on page 55.
To reinstall the computer cover and reconnect cables to your computer, do the following:
1. Ensure that all components have been reassembled correctly and that no tools or loose screws are left
inside your computer. See “Locating major FRUs and CRUs” on page 71 for the locations of various
components in your computer.
2. Ensure that the cables are routed correctly before reinstalling the computer cover. Keep cables clear of
the hinges and sides of the computer chassis to avoid interference with reinstalling the computer cover.

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3. Align the four plastic tabs on the top of the computer cover with the corresponding tabs in the front
bezel. Then, pivot the computer cover downward until it snaps into position.

Figure 58. Installing the computer cover

4. If there is an integrated cable lock available, lock the computer.
5. If there is a frame stand, reinstall it. See “Installing the monitor stand” on page 82.
6. Reconnect the external cables and power cords to the computer. See “Locating connectors on the
rear of your computer” on page 70.
7. To update your configuration, refer to Chapter 6 “Using the Setup Utility program” on page 55.
Note: In most areas of the world, Lenovo requires the return of the defective Field Replacement Units (FRUs).
Information about this will come with the new FRUs or will come a few days after you receive the new FRUs.

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Chapter 10. Additional Service Information
This chapter provides additional information that the service representative might find helpful.

Security features
Security features in this section include the following:
• Passwords
• Vital Product Data
• Management Information Format (MIF)

Hardware controlled Passwords
Hardware controlled passwords are set using the Setup Utility program. For more information about
passwords, see “Using passwords” on page 55.

Operating system password
An operating system password is very similar to a power-on password and denies access to the computer
by an unauthorized user when the password is activated. The computer is unusable until the password is
entered and recognized by the computer.

Vital product data
Each computer has a unique Vital Product Data (VPD) code stored in the nonvolatile memory on the system
board. After you replace the system board, the VPD must be updated. To update the VPD, see “Flash
update procedures” on page 129.

BIOS levels
An incorrect level of BIOS can cause false errors and unnecessary FRU replacement. Use the following
information to determine the current level of BIOS installed in the computer, the latest BIOS available for the
computer, and where to obtain the latest level of BIOS.
• To determine the current Level of BIOS:
– Start the Setup Utility.
– Select Main ➙ BIOS Revision Level
• Sources for obtaining the latest level BIOS available
1. Lenovo support web site: http://www.lenovo.com/support/
2. Lenovo Customer Support Center
3. Levels 1 and 2 Support
To update (flash) the BIOS, see “Flash update procedures” on page 129.
Note: BIOS settings vary by operating system. Change the BIOS settings before installing a new operating
system. See “Changing the BIOS settings before installing a new operating system” on page 60.

Flash update procedures
This section details how to flash (update) the BIOS.

129

Updating (flashing) the BIOS from a disc
This section provides instructions on how to update (flash) the BIOS from a disc on the Windows 8 (64-bit)
operating system and on other operating systems.
Note: You can download a self-starting bootable disc image (known as an ISO image) with the system
program updates to create a system-program-update disc. Go to http://www.lenovo.com/support.
To update (flash) the BIOS from a disc on the Windows 8 (64-bit) operating system, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 55.
2. From the Setup Utility program main menu, select Exit ➙ OS Optimized Default ➙ Disabled.
3. Select Yes in the window displayed and press Enter to confirm your selection.
4. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.
5. Repeatedly press and release F12 when turning on the computer. When the Startup Device Menu
window opens, release F12.
6. From the Startup Device Menu window, select the desired optical drive as the startup device. Then,
insert the disc into this optical drive and press Enter. The update begins.
7. When prompted to change the serial number, it is suggested that you do not make this change by
pressing N. However, if you do want to change the serial number, press Y, and then type in the serial
number and press Enter.
8. When prompted to change the machine type and model, it is suggested that you do not make this
change by pressing N. However, if you do want to change the machine type and model, press Y, and
then type in the machine type and model and press Enter.
9. Follow the instructions on the screen to complete the update. After the update is completed, remove the
disc from the optical drive.
10. Restart your computer and start the Setup Utility program. See “Starting the Setup Utility program”
on page 55.
11. From the Setup Utility program main menu, select Exit ➙ OS Optimized Default ➙ Enabled.
12. Select Yes in the window displayed and press Enter to confirm your selection.
13. Press F10 to save changes and exit the Setup Utility program. See “Exiting the Setup Utility program”
on page 60.
To update (flash) the BIOS from a disc on other operating systems, do the following:
1. Turn off your computer.
2. Repeatedly press and release F12 when turning on the computer. When the Startup Device Menu
window opens, release F12.
3. From the Startup Device Menu window, select the desired optical drive as the startup device. Then,
insert the disc into this optical drive and press Enter. The update begins.
4. When prompted to change the serial number, it is suggested that you do not make this change by
pressing N. However, if you do want to change the serial number, press Y, and then type in the serial
number and press Enter.
5. When prompted to change the machine type and model, it is suggested that you do not make this
change by pressing N. However, if you do want to change the machine type and model, press Y, and
then type in the machine type and model and press Enter.
6. Follow the instructions on the screen to complete the update. After the update is completed, remove the
disc from the optical drive.

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Updating (flashing) the BIOS from your operating system
Note: Because Lenovo makes constant improvements to its Web sites, the Web page contents are subject
to change without notice, including the contents referenced in the following procedure.
To update (flash) the BIOS from your operating system, do the following:
1. Go to http://www.lenovo.com/support.
2. Click Download Drivers & Software.
3. Click Use Quick Path.
4. Type the 4-digit machine type for your computer in the Quick Path field and then click Find My Product.
5. Click BIOS.
6. Locate the BIOS version that you want to download.
7. Click Click for files. All available files will be displayed.
8. Click the link for the readme file that contains the instructions for updating (flashing) the BIOS from
your operating system.
9. Print these instructions. This is very important because these instructions will not be displayed on
the screen after the download begins.
10. Follow the printed instructions to download, extract, and install the update.

Recovering from a POST/BIOS update failure
If the power to your computer is interrupted while the POST and BIOS is being updated, your computer
might not restart correctly. If this happens, perform the following procedure to recover from the POST and
BIOS update failure. This procedure is commonly called Boot-block Recovery.
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 84.
3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system
board” on page 74.
4. Remove any cables that impede access to the Clear CMOS /Recovery jumper.
5. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and
pin 3).
6. Reconnect any cables that were disconnected.
7. Reinstall the computer cover and connect the power cord. See “Completing the parts replacement” on
page 126.
8. Turn on the computer and then insert the POST and BIOS update (flash update) disc into the optical
drive. Wait a few minutes. Then, the recovery session begins. The recovery session will take two to
three minutes. During this time, a warning message will be displayed and no action is needed from you.
9. After the recovery session is completed, there will be no video, and your computer will automatically
turn off.
10. Repeat step 1 through step 4.
11. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
12. Reconnect any cables that were disconnected.
13. Reinstall the computer cover and reconnect any cables that were disconnected.
14. Turn on the computer to restart the operating system.

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131

Power management
Power management reduces the power consumption of certain components of the computer such as the
system power supply, processor, hard disk drives, and display.

Advanced configuration and power interface (ACPI) BIOS
Being an ACPI BIOS system, the operating system is allowed to control the power management features
of the computer and the setting for Advanced Power Management (APM) BIOS mode is ignored. Not
all operating systems support ACPI BIOS mode.

Automatic Power-on features
The Automatic Power-On features within the Power Management menu allow you to enable and disable
features that turn on the computer automatically.
• Wake Up on Alarm: You can specify a date and time at which the computer will be turned on
automatically. This can be either a single event or a daily event.
• Wake on LAN: If the computer has a properly configured token-ring or Ethernet LAN adapter card that is
Wake on LAN-enabled and there is remote network management software, you can use the Wake on LAN
feature. When you set Wake on LAN to Enabled, the computer will turn on when it receives a specific
signal from another computer on the local area network (LAN).
To enable the Wake on LAN function or the Wake Up on Alarm function on the Windows 8 operating system,
do the following:
1. Open Control Panel.
2. Click Hardware and Sound ➙ Power Options.
3. In the left panel, click Choose what the power buttons do.
4. In the Shutdown setting section, clear Turn on fast startup.
Note: If the settings are unavailable, click Change settings that are currently unavailable.
5. Click Save changes.

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Appendix A. Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult
your local Lenovo representative for information on the products and services currently available in your
area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that
Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service
that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user's
responsibility to evaluate and verify the operation of any other product, program, or service.
Lenovo may have patents or pending patent applications covering subject matter described in this
document. The furnishing of this document does not give you any license to these patents. You can send
license inquiries, in writing, to:
Lenovo (United States), Inc.
1009 Think Place - Building One
Morrisville, NC 27560
U.S.A.
Attention: Lenovo Director of Licensing
LENOVO PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow
disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply
to you.
This information could include technical inaccuracies or typographical errors. Changes are periodically
made to the information herein; these changes will be incorporated in new editions of the publication.
Lenovo may make improvements and/or changes in the product(s) and/or the program(s) described in this
publication at any time without notice.
The products described in this document are not intended for use in implantation or other life support
applications where malfunction may result in injury or death to persons. The information contained in this
document does not affect or change Lenovo product specifications or warranties. Nothing in this document
shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo
or third parties. All information contained in this document was obtained in specific environments and is
presented as an illustration. The result obtained in other operating environments may vary.
Lenovo may use or distribute any of the information you supply in any way it believes appropriate without
incurring any obligation to you.
Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in
any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of
the materials for this Lenovo product, and use of those Web sites is at your own risk.
Any performance data contained herein was determined in a controlled environment. Therefore, the result
obtained in other operating environments may vary significantly. Some measurements may have been
made on development-level systems and there is no guarantee that these measurements will be the same
on generally available systems. Furthermore, some measurements may have been estimated through
extrapolation. Actual results may vary. Users of this document should verify the applicable data for their
specific environment.

133

Television output notice
The following notice applies to models that have the factory-installed television-output feature.
This product incorporates copyright protection technology that is protected by method claims of certain U.S.
patents and other intellectual property rights owned by Macrovision Corporation and other rights owners.
Use of this copyright protection technology must be authorized by Macrovision Corporation, and is intended
for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation.
Reverse engineering or disassembly is prohibited.

European conformance CE mark

Trademarks
The following terms are trademarks of Lenovo in the United States, other countries, or both:
Lenovo
The Lenovo logo
Rescue and Recovery
ThinkCentre
ThinkVantage
Microsoft, Windows, and Windows Media are trademarks of the Microsoft group of companies.
DisplayPort and VESA are Trademarks of the Video Electronics Standards Association.
Other company, product, or service names may be trademarks or service marks of others.

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Index
A
Administrator, password 56
ambient light sensor, replacing

completing the installation 126
FRU locations 71
FRU part numbers 1, 67, 74
FRUs, replacing 81

106

basic troubleshooting 35
battery, replacing 114
BIOS settings, changing 60
boot-block recovery 131

GPU heat sin and fan, replacing

111

H
hard disk drive, replacing
heat sink, replacing 92

C
card reader, replacing 107
changing
password 56
startup device sequence 58
cleaning an optical mouse 42
CMOS, clearing 57
components, internal 71
computer cover
removing 84
computer cover, reinstalling 126
connectors
rear 70
connectors, controls, indicators
front 67
considerations, passwords 56
converter board, replacing 91
cover presence switch, replacing 100
CRUs (Customer Replacable Units), returning defective

I
Identifying FRUs 71
installing
operating system 60
installing options
memory module 87
integrated camera, replacing 103
internal speakers, replacing 97

L
Lenovo Solution Center 53
locating components 71
looking up part numbers 1, 67, 74
71

M
D
deleting a password 56
devices, handling static-sensitive
diagnostics, troubleshooting 35

E
environment, operating 30
exiting, Setup Utility 60
ExpressCard, replacing 110
external options, installing 81

F
failure, recovering from POST/BIOS 131
flashing the BIOS 130
frame foot
removing 85
front
connectors, controls, indicators 67
FRU

memory module
installing, replacing 87
system board 87
microprocessor
replacing 94
monitor stand
removing 82
mSATA solid-state drive, mini PCI Express x1 card,
replacing 108

N
notice, television output
notices 133

134

O
optical drive, replacing
optical mouse
cleaning 42
Optional-service CRUs

135

P
part numbers 1, 67, 74
parts replacement, completing 126
password
Administrator 56
considerations 56
Power-On Password 56
setting, changing, deleting 56
passwords
erasing 57
lost or forgotten 57
passwords, using 55
physical specifications 29
Power-On, Password 56

R
rear connectors 70
rear I/O assembly
removing 86
rear PS/2 connectors and serial port assembly
removing 112
recovering
from a POST/BIOS update failure 131
recovery
boot-block 131
removing computer cover 84
removing frame foot 85
removing monitor stand 82
removing rear I/O assembly 86
removing rear PS/2 connectors and serial port assembly 112
replacing
ambient light sensor 106
battery 114
card reader 107
converter board 91
cover presence switch 100
ExpressCard 110
GPU heat sink and fan 111
hard disk drive 88
heat sink 92
integrated camera 103
internal speakers 97
microprocessor 94
mSATA solid-state drive, mini PCI Express x1 card 108
system board 119
thermal sensor 98
WiFi antenna 124
WiFi card 104
replacing the LCD panel 118
replacing the microprocessor fan 116
replacing the power supply assembly 115
replacing the power switch and control button board 123
replacing the touch panel control boards 122

S
security
enabling or disabling

136

selecting
startup device 58
temporary startup device 58
Self-service CRUs 71
setting
password 56
settings
changing 55
viewing 55
Setup Utility 55
Setup Utility program, starting 55
Setup Utility, exiting 60
starting the Setup Utility program 55
startup device 58
sequence, changing 58
temporary, selecting 58
static-sensitive devices, handling 81
support web site
support 31
support, web site 31
system board
connectors 74
locating parts 74
locations 74
memory module 87
system board, replacing 119

T
television output notice 134
temporary startup device 58
the BIOS, updating (flashing) 130–131
the LCD panel
replacing 118
the microprocessor fan
replacing 116
the power supply assembly
replacing 115
the power switch and control button board
replacing 123
the touch panel control boards
replacing 122
thermal sensor, replacing 98
trademarks 134
troubleshooting, basic 35
troubleshooting, diagnostics 35

U
updating
(flashing) the BIOS 130
updating (flashing) the BIOS
using
passwords 55
Setup Utility 55

131

V
57

ThinkCentre M93zHardware Maintenance Manual

viewing and changing settings

W
WiFi antenna, replacing 124
WiFi card, replacing 104

137

138

ThinkCentre M93zHardware Maintenance Manual

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EXIF Metadata provided by EXIF.tools

Lenovo M93Z Hmm User Manual All In One (Think Centre) Type 10AF

M93Z Hmm Hardware Maintenance Manual (HMM) - ThinkCentre M93z M93z All-in-One (ThinkCentre) - Type 10AF m93z_hmm ThinkCentre M93z, 10AF

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