Lenovo M4350 Hmm 20130903 User Manual Hardware Maintenance Desktop (Lenovo) Type 10154

2013-09-02

User Manual: Lenovo Lenovo M4350 Hmm 20130903 Lenovo M4350 Hardware Maintenance Manual M4350 Desktop (Lenovo) - Type 10154

Open the PDF directly: View PDF .
Page Count: 120

Download
Open PDF In Browser	View PDF

Lenovo M4350
Hardware Maintenance Manual

Machine Types: 90AG and 10154

Note: Before using this information and the product it supports, be sure to read the general information
under Appendix A “Notices” on page 109.

First Edition (August 2013)
© Copyright Lenovo 2013.
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
About this manual . . . . . . . . . . . . . .

iii

Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . .
Electrical safety . . . . . . . . . . .
Voltage-selection switch . . . . . . . .
Safety inspection guide . . . . . . . .
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . .
Grounding requirements . . . . . . . .
Safety notices (multi-lingual translations) .

.
.
.
.

1
1
3
3

. . . .
. . . .
. . . .

4
4
4

Chapter 2. General information . . . .

Specifications . . . . . . . . . . . . . . .
Lenovo Support Web site . . . . . . . . . .

27
28

Chapter 3. General checkout . . . . .

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

Chapter 4. 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 . . . . . . . . . . . . .
Lenovo Solution Center . . . . . .

. . .

.
.
.
.
.
.
.
.

32
32
32
33
34
35
36
37

.
.
.
.
.
.
.
.
.
.
.

37
39
40
43
43
45
45
46
46
47
47

Chapter 5. Using the Setup Utility
program . . . . . . . . . . . . . . . .

Starting the Setup Utility program . . . . . . .
Viewing and changing settings . . . . . . . .
Using passwords. . . . . . . . . . . . . .

49
49
49

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 compliance mode . . . . . . . .
Changing the BIOS settings before installing a new
operating system. . . . . . . . . . . . . .
Exiting the Setup Utility program . . . . . . .

50
50
50
50
50

Chapter 6. Symptom-to-FRU index . .

Hard disk drive boot error . .
Power supply problems . . .
Beep symptoms . . . . . .
POST error codes . . . . .
Miscellaneous error messages
Undetermined problems . . .

.
.
.
.
.
.

52
52
53
53

.
.
.
.
.
.

55
55
55
56
58
59

Chapter 7. Locations . . . . . . . . .

Locating connectors, controls, and indicators
the front of your computer . . . . . . . .
Locating connectors on the rear of your
computer . . . . . . . . . . . . . . .
Locating major FRUs . . . . . . . . . .
Locating parts on the system board . . . .
Locating internal drives . . . . . . . . .

.
.
.
.
.
.

51
51
51
52

on
. .

.
.
.
.

62
63
66
67

Chapter 8. Replacing FRUs . . . . . .

Handling static-sensitive devices . . . . .
Installing or replacing hardware . . . . . .
Removing the computer cover. . . . .
Removing and reinstalling the front bezel
Replacing the primary hard disk drive . .
Replacing the thermal sensor . . . . .
Replacing the front audio and USB
assembly . . . . . . . . . . . . .
Replacing the optical drive . . . . . .
Replacing the power supply assembly .
Replacing the system fan. . . . . . .
Installing or replacing a PCI card . . . .
Replacing the battery . . . . . . . .
Installing or replacing a memory module .

.
.
.
.
.
.

69
69
69
70
72
74

.
.
.
.
.
.
.

76
77
79
81
82
85
86

Replacing the heat sink and fan assembly .
Replacing the microprocessor . . . . . .
Replacing the system board . . . . . .
Replacing the WiFi units . . . . . . . .
Installing or removing the rear WiFi antenna .
Installing or removing the front WiFi
antenna . . . . . . . . . . . . . .
Completing the parts replacement . . . .

.
.
.
.
.

88
90
92
94
100

.
.

101
103

Chapter 9. Additional service
information . . . . . . . . . . . . .
Security features . . . . . . . .
Hardware-controlled passwords
Operating system password .
Vital Product Data . . . . .
BIOS levels . . . . . . . . . .
Flash update procedures . . . .

.
.
.
.
.
.

Lenovo M4350 Hardware Maintenance Manual

.
.
.
.
.
.

105
.
.
.
.
.
.

105
105
105
105
105
105

Updating (flashing) the BIOS from a disc. . .
Updating (flashing) the BIOS from your
operating system . . . . . . . . . . . .
Recovering from a POST and BIOS update
failure . . . . . . . . . . . . . . . .
Power management . . . . . . . . . . . .
Advanced Configuration and Power Interface
(ACPI) BIOS . . . . . . . . . . . . . .
Automatic Power-on features . . . . . . .

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

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

106
107
107
108
108
108

109
110
110
110

111

About this manual
This manual provides service and reference information for Lenovo® desktop computers listed on the
front cover.
Chapter 6 “Symptom-to-FRU index” on page 55 and Chapter 9 “Additional service information” on page 105
are not specific to any machine type and are applicable to all Lenovo desktop computers.
For major Field Replaceable Units (FRU) locations and Customer Replaceable Unit (CRU) identification,
see Chapter 7 “Locations” on page 61.
For FRU replacement instructions, see Chapter 8 “Replacing FRUs” on page 69.
For FRU part numbers, go to:
http:/www.lenovo.com/serviceparts-lookup
Important: This manual is intended only for trained service technicians who are familiar with Lenovo
desktop computers. Use this manual along with the advanced diagnostic tests to troubleshoot problems
effectively. Before servicing a Lenovo desktop computer, be sure to read and understand Chapter 1 “Safety
information” on page 1.

Chapter 1. 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 centre covers, unless instructed otherwise in
the installation and configuration procedures.
Observe the following rules when working on electrical equipment.

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 an electric 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 (FRU)
• 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 an electric 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.

Lenovo M4350 Hardware Maintenance Manual

Voltage-selection switch
Some computers are equipped with a voltage-selection switch located near the power-cord connection
point on the computer. If your computer has a voltage-selection switch, ensure that you set the switch to
match the voltage available at your electrical outlet. Setting the voltage-selection switch incorrectly can
cause permanent damage to the computer.
If your computer does not have a voltage-selection switch, your computer is designed to operate only at the
voltage provided in the country or region where the computer was originally purchased.
If you relocate your computer to another country, be aware of the following:
• If your computer does not have a voltage-selection switch, do not connect the computer to an electrical
outlet until you have verified that the voltage provided is the same as it was in the country or region
where the computer was originally purchased.
• If your computer has a voltage-selection switch, do not connect the computer to an electrical outlet until
you have verified that the voltage-selection switch is set to match the voltage provided in that country
or region.
If you are not sure of the voltage provided at your electrical outlet, contact your local electric company or
refer to official Web sites or other literature for travelers to the country or region where you are located.

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.
Chapter 1. Safety information

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.
• 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.

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)

Lenovo M4350 Hardware Maintenance Manual

• French
• German
• Hebrew
• Italian
• Korean
• Spanish

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

Chapter 1. Safety information

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.
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

Lenovo M4350 Hardware Maintenance Manual

Chapter 1. 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.
8

Lenovo M4350 Hardware 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 1. 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.

2
1

Lenovo M4350 Hardware Maintenance Manual

Chapter 1. Safety information

2
1

Lenovo M4350 Hardware Maintenance Manual

2
1

Chapter 1. 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.

Lenovo M4350 Hardware 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 1. Safety information

2
1

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.

Lenovo M4350 Hardware 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 1. Safety information

2
1

Lenovo M4350 Hardware Maintenance Manual

2
1

Chapter 1. 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).
20

Lenovo M4350 Hardware Maintenance Manual

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.

2
1

Chapter 1. Safety information

Lenovo M4350 Hardware Maintenance Manual

2
1

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 1. 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

Lenovo M4350 Hardware 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.

2
1

Chapter 1. Safety information

Lenovo M4350 Hardware Maintenance Manual

Chapter 2. General information
This chapter provides general information that applies to all machine types supported by this manual.

Specifications
This section lists the specifications for your computer.
Dimensions
Width: 160.00 mm (6.30 inches)
Height: 392.10 mm (15.44 inches)
Depth: 378.50 mm (14.90 inches)
Weight
Maximum configuration as shipped: 7.5 kg (16.53 lb) (without package)
Maximum configuration as shipped: 9.6 kg (21.16 lb) (with package)
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)
Storage without package: -10°C to 60°C (14°F to 140°F)
• Humidity:
Operating: 20% to 80% (non-condensing)
Non-operating: 20% to 90% (non-condensing)
• Altitude:
Operating: -15.2 to 3048 m (-50 to 10 000 ft)
Storage: -15.2 to 10 668 m (-50 to 35 000 ft)
Electrical input
• Input voltage:
– Low range:
Minimum: 100 V ac
Maximum: 127 V ac
Input frequency range: 50 to 60 Hz
Voltage-selection switch setting: 115 V ac
– High range:
Minimum: 200 V ac
Maximum: 240 V ac
Input frequency range: 50 to 60 Hz
Voltage-selection switch setting: 230 V ac

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

Lenovo M4350 Hardware Maintenance Manual

Chapter 3. 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 105.
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 55.
• If the computer displays a POST error, go to “POST error codes” on page 56.
• 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 47.
• 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

– 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
Note: 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 operating-system-controlled files
Comparing the configuration and software set-up between “working and non-working” systems will often
lead to problem resolution.

Lenovo M4350 Hardware Maintenance Manual

Chapter 4. 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 28 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, 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 monitor screen is blank.

Verify that:
• The monitor signal cable is correctly connected to the monitor and to the
appropriate monitor connector on the computer.
• The monitor power cord is correctly connected to the monitor and to a working
electrical outlet.
• The monitor is turned on and the brightness and contrast controls are set
correctly.
• The computer voltage matches the voltage available at the electrical outlet for
your country or region.
• If your computer has two monitor connectors, be sure to use the connector
on the graphics card.

The keyboard does not work.

Verify that:
• The computer is turned on.
• The keyboard is securely connected to a USB 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 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 51.

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 5 “Using the Setup Utility
program” on page 49.
4. Go to the “Troubleshooting” on page 32 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, 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 47 for more information.
• If the diagnostic program detects a hardware failure, contact the Lenovo Customer Support Center.
See “Lenovo Support Web site” on page 28 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 28 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 28 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:

Lenovo M4350 Hardware Maintenance Manual

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.
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 33

•

“CD problems” on page 34

•

“DVD problems” on page 35

•

“Intermittent problems” on page 36

•

“Hard disk drive problems” on page 37

•

“Keyboard, mouse, or pointing device problems” on page 37

•

“Monitor problems” on page 39

•

“Networking problems” on page 40

•

“Option problems” on page 43

•

“Performance and lockup problems” on page 43

•

“Printer problems” on page 45

•

“Serial port problems” on page 45

•

“Software problems” on page 46

•

“USB problems” on page 46

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

“No audio in Windows” on page 33
“An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive”
on page 34

•

“Sound comes from one external speaker only” on page 34

•

“No audio in DOS applications or games” on page 34

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.
Chapter 4. Troubleshooting and diagnostics

• Make sure that the program you are running is designed for use in the Microsoft 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.
• Verify that the audio device drivers are correctly installed. See Microsoft Windows help system for more
information.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 34.

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 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 34
“A CD or DVD does not work” on page 35
“Unable to use a startable (bootable) recovery medium, such as the Product Recovery CD, to start
your computer” on page 35

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.

Lenovo M4350 Hardware Maintenance Manual

Action: 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.
If this does not correct the problem, follow the action for “A CD or DVD does not work” on page 35.

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 52 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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

DVD problems
Select your symptom from the following list:
•

“Black screen instead of DVD video” on page 35

•

“DVD movie will not play” on page 36

•

“No audio or intermittent audio while playing DVD movie” on page 36

•

“Playback is very slow or choppy” on page 36

•

“Invalid disc or no disc found message” on page 36

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

Chapter 4. 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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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

Lenovo M4350 Hardware 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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 37

•

“"No Operating System Found" message or the system not starting from the correct hard disk drive”
on page 37

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 47. If you need technical assistance, see “Lenovo Support Web site” on page 28.

"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 51.
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 47. If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 38

•

“The mouse or pointing device does not work” on page 38

Chapter 4. Troubleshooting and diagnostics

•

“The pointer on the screen does not move smoothly with the mouse” on page 38

•

“The wireless keyboard does not work” on page 38

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 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 28 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 51.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 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.

Lenovo M4350 Hardware Maintenance Manual

• 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.
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 39

•

“The monitor works when you turn on the computer, but goes blank after some period of computer
inactivity” on page 39

•

“The monitor works when you turn on the computer, but goes blank when you start some application
programs” on page 39

•

“The image appears to be flickering” on page 40

•

“The image is discolored” on page 40

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 28.

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 diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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:
• Make sure 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 diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.
Chapter 4. Troubleshooting and diagnostics

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.
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. 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 28 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 28 for details.

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

“Ethernet problems” on page 40

For more information, see “Lenovo Support Web site” on page 28.

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

“Your computer cannot connect to the network” on page 41

Lenovo M4350 Hardware Maintenance Manual

•

“The adapter stops working for no apparent reason” on page 41

•

“If your computer is a Gigabit Ethernet model and you use a speed of 1000 Mbps, the connection fails
or errors occur” on page 41

•

“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 42

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. 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.
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.

Chapter 4. Troubleshooting and diagnostics

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.
• 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 WAN card is not supported on this computer. Remove it.
Note: Some computer models do not have a wireless WAN.

Bluetooth problem
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.

Lenovo M4350 Hardware Maintenance Manual

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 43

•

“An option that previously worked does not work now” on page 43

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.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 44

•

“Excessive number of fragmented files” on page 44

•

“Insufficient memory” on page 45

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

Chapter 4. Troubleshooting and diagnostics

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, 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. Open the Windows Explorer and click Computer.
2. Right-click your C drive entry and then click Properties.
3. Click Disk Cleanup.
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. 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: To run the Windows Disk Defragmenter program, 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.

Lenovo M4350 Hardware Maintenance Manual

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.

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 28. For step-by-step instructions on installing memory, see “Installing or replacing a memory
module” on page 86.
If these actions do not correct the problem, run the diagnostic programs (see “Lenovo Solution Center” on
page 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.

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 5 “Using the Setup Utility program”
on page 49.
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 28.

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 47 for instructions). If you need technical assistance, see “Lenovo Support Web site” on page 28.
Chapter 4. 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 46

•

“Software does not work as expected” on page 46

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, 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 28 for details.

USB problems
Symptom: The USB connectors cannot be accessed.
Actions:
46

Lenovo M4350 Hardware Maintenance Manual

• 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 47 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 28.

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 47.
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 a Windows operating system other than Windows 8, go to http://www.lenovo.com/diags
for the latest information on diagnostics for your computer.
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 4. Troubleshooting and diagnostics

Lenovo M4350 Hardware Maintenance Manual

Chapter 5. 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 49.
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, select Save Changes and Exit at the bottom of the
screen. The error message will not be displayed again.
• Press F2 to bypass the error message and log in to the operating system.

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 49. 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
• 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 49.
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.

Lenovo M4350 Hardware Maintenance Manual

Note: A password can be any combination of up to 64 alphabetic and numeric characters. For more
information, see “Password considerations” on page 50.

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 69.
3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system
board” on page 66.
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 103.
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 3.
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 103.

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 49.
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 Drives Setup ➙ SATA Controller to enable or disable a SATA device.
4. Select the desired settings and press Enter.
5. Press F10 to save and exit the Setup Utility program. See “Exiting the Setup Utility program” on page 53.

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.

Chapter 5. Using the Setup Utility program

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 Startup Device
Menu 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 Startup Device Menu 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 49.
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 and exit the Setup Utility program. See “Exiting the Setup Utility program” on page 53.

Enabling ErP compliance mode
You can enable the energy-related products directive (ErP) compliance mode through the Power menu in the
Setup Utility program to reduce the consumption of electricity when your computer is in standby or off mode.
To enable ErP compliance mode in the Setup Utility program, do the following:
1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 49.
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 compliance mode is enabled, you can wake up your computer by doing one of the following:
• 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. See “Starting the Setup Utility program” on page 49.
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.

Lenovo M4350 Hardware Maintenance Manual

• 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. See “Starting the Setup Utility program” on page 49.
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.

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 49.
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 53.

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 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 opens, 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.

Chapter 5. Using the Setup Utility program

Lenovo M4350 Hardware Maintenance Manual

Chapter 6. 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 3 “General checkout” on page 29. 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 59.
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, 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 (error codes 1962 and I999030X) 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 start-up 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 systems program, 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

Perform the following actions in order.
1. Start the Setup Utility program and press F10 to
Save and exit. See Chapter 5 “Using the Setup Utility
program” on page 49.
2. Start the Setup Utility program and press F9 to load
defaults and then press F10 to Save and exit.
3. Perform a Boot-block recovery. See “Recovering
from a POST and BIOS update failure” on page 107.

3 short beeps and then 1 long beep 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.
POST Error code

POST Error message

Description/Action

00CE

Machine Type or Serial Number is INVALID

This error message is displayed when the machine
type or the serial number is invalid.

0211

Keyboard not found

This error message is displayed when there is no
keyboard detected.

0135

Fan failure

The system might be overheating.
Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.
Note: If the problem is caused by the
microprocessor fan, pressing F10 will not solve
the problem.

0164

Memory size decreased

This error message is displayed when the memory
size has decreased.
Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

Lenovo M4350 Hardware Maintenance Manual

POST Error code
1762

POST Error message
Configuration change has occurred

Description/Action
This error message is displayed when a hard disk
drive or optical drive change has been made.
Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

1820

More than one external fingerprint reader
is 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 is
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.

0162

Setup data integrity check failure

Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0167

No processor microcode update found

This error message indicates that there is
no microcode update image for the current
microprocessor.

0175

System Security - Security data corrupted

Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0176

System Security - The system has been
tampered with

This error message is displayed when the
computer is turned on with the cover open or
removed.
Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0189

System Security - Can not read the
Security EEPROM

This error message indicates that the Security
EEPROM may be broken or removed.
Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0197

System Security - Unauthorized security
data change detected

Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0190

System Security - Invalid security change
requested

Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

0199

System Security - Security password retry
count exceeded

Press F1 to enter the Setup Utility program.
Then press F10 to save and exit the Setup Utility
program.

Chapter 6. Symptom-to-FRU index

Miscellaneous error messages
Message/Symptom

FRU/Action

Changing display colors

Display/Monitor

Computer will not power-off. See “Hard disk drive boot
error” on page 55.

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 49)
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
55.

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

Flashing cursor with an otherwise blank display.

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

Incorrect memory size during POST

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

Lenovo M4350 Hardware Maintenance Manual

1. See “Hard disk drive boot error” on page 55.

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

FRU/Action
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

Printer problems

1. Printer

2. System Board

2. System Board
2. System Board

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

1. Run Setup 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 or parallel port device failure (system board port)

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

Serial or parallel 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

Undetermined problems
If you encounter undetermined problems, do the following:
1. Turn off the computer and the power.
2. Remove or disconnect the following components (if installed) one at a time.
a. External devices (modem, printer, or mouse)
b. Any adapter cards
c. Memory modules

Chapter 6. Symptom-to-FRU index

d. Extended video memory
e. External Cache
f. External Cache RAM
g. Hard disk drive
h. Diskette drive
3. Turn on the power and the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or adapter cards.
If all devices and adapter cards have been removed, and the problem continues, replace the system board.
See “Replacing the system board” on page 92.

Lenovo M4350 Hardware Maintenance Manual

Chapter 7. Locations
This chapter provides information to help you locate your computer connectors, major FRUs and CRUs,
parts on the system board, and internal drives.
Note: The components in your computer might look slightly different from the illustrations.

Locating connectors, controls, and indicators on the front of your
computer
Figure 1 “Front connector, control, and indicator locations” on page 61 shows the locations of the
connectors, controls, and indicators on the front of your computer.

Figure 1. Front connector, control, and indicator locations
1 Hard disk drive activity indicator

5 USB 2.0 connector

2 Power switch

6 Microphone connector

3 Power indicator

7 Headphone connector

4 Optical drive eject/close button

8 USB 2.0 connector

Locating connectors on the rear of your computer
Figure 2 “Rear connector locations” on page 62 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 Voltage-selection switch (available on some
models)

9 Audio line-out connector

2 Power cord connector

10 Audio line-in connector

3 PS/2 mouse connector

11 PCI Express x16 graphics card slot

4 PS/2 keyboard connector

12 PCI Express x1 card slots (2)

5 Serial port

13 Integrated cable lock (Kensington lock) slot

6 VGA monitor connector

14 Padlock loop

7 USB connectors (4)

15 Optional serial port

8 Microphone connector

16 Ethernet connector

Connector

Description

Audio line-in connector

Used to receive audio signals from an external audio device, such as a stereo
system. When you attach an external audio device, a cable is connected between
the audio line-out connector of the device and the audio line-in connector of the
computer.

Audio line-out connector

Used to send audio signals from the computer to external devices, such as powered
stereo speakers (speakers with built-in amplifiers), headphones, multimedia
keyboards, or the audio line-in connector on a stereo system or other external
recording device.

Lenovo M4350 Hardware Maintenance Manual

Connector

Description

Ethernet connector

Used to attach an Ethernet cable for a local area network (LAN).
Note: To operate the computer within FCC Class B limits, use a Category 5 Ethernet
cable.

Microphone connector

Used to attach a microphone to your computer when you want to record sound or if
you use speech-recognition software.

Serial port

Used to attach an external modem, a serial printer, or other devices that use a
9-pin serial port.

USB connector

Used to attach a device that requires a USB connector, such as a USB keyboard, a
USB mouse, a USB scanner, or a USB printer. If you have more than eight USB
devices, you can purchase a USB hub, which you can use to connect additional
USB devices.

VGA monitor connector

Used to attach a VGA monitor or other devices that use a VGA monitor connector.

Locating major FRUs
Figure 3 “Locating major FRUs” on page 64 shows the locations of the various components in your
computer. To remove the computer cover, see “Removing the computer cover” on page 69.

Chapter 7. Locations

Figure 3. Locating major FRUs

The following table lists the major FRUs shown in Figure 3 “Locating major FRUs” on page 64.

Lenovo M4350 Hardware Maintenance Manual

Number

FRU description

Power supply assembly

Heat sink and fan assembly

Microprocessor

Memory modules

Optical drive

Front WiFi antenna

Front audio and USB assembly

Front bezel

Hard disk drive

System board

Battery

WiFi card module

WiFi adapter card

Rear WiFi antenna

Peripheral Component Interconnect (PCI) card (installed in some models)

System fan

Keyboard

Mouse

Chapter 7. Locations

Locating parts on the system board
Figure 4 “System board part locations” on page 66 shows the locations of the parts on the system board.

Figure 4. System board part locations
1 4-pin power connector

11 Front USB connector 1 (for connecting USB ports on the
front bezel)

2 Microprocessor

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

3 Microprocessor fan connector

13 Front USB connector 2 (for connecting an additional USB
device)

4 Memory slot 1 (DIMM1)

14 Battery

5 Memory slot 2 (DIMM2)

15 Serial (COM2) connector

6 Thermal sensor connector

16 Front audio connector

7 24-pin power connector

17 PCI Express x1 card slots (2)

8 Power fan connector

18 PCI Express x16 graphics card slot

9 SATA connectors (3)

19 System fan connector

10 Front panel connector (for connecting LED
indicators and the power switch)

Lenovo M4350 Hardware Maintenance Manual

Locating internal drives
Internal drives are devices that your computer uses to read and store data. You can add drives to your
computer to increase storage capacity and enable your computer to read other types of media. Internal
drives are installed in bays. In this manual, the bays are referred to as bay 1, bay 2, and so on.
When installing or replacing an internal drive, it is important to note the type and size of the drive that you
can install or replace in each bay and correctly connect the cables to the drive installed. Refer to the
appropriate section in “Installing or replacing hardware” on page 69 for instructions on how to install or
replace internal drives for your computer.
Figure 5 “Drive bay locations” on page 67 shows the locations of the drive bays.

Figure 5. Drive bay locations
1 Bay 1 - Optical drive bay (with an optical drive installed on some models)
2 Bay 2 - Primary hard disk drive bay (with a 3.5-inch SATA hard disk drive installed)
3 Bay 3 - Secondary hard disk drive bay

Chapter 7. Locations

Lenovo M4350 Hardware Maintenance Manual

Chapter 8. Replacing FRUs
Important: Before you replace any FRU, be sure to read and understand Chapter 1 “Safety information” on
page 1. These precautions and guidelines will help you work safely.
FRU replacements are to be done only by trained service technicians.
This chapter provides instructions about removing or replacing major FRUs. Not all FRUs are documented.

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 computer parts and components, take these precautions to avoid static-electricity damage:
• Limit your movement. Movement can cause static electricity to build up around you.
• Always carefully handle the parts and other computer components. Handle PCI cards, memory modules,
system boards, and microprocessors by the edges. Never touch 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 new 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.
• Remove the new part from the static-protective package and directly install it in the computer without
placing it on any other surface. If it is hard for you to do this in your specific situation, place the
static-protective package of the new part on a smooth, level surface, and then place the new part on
the static-protective package.
• 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 the Chapter 1 “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.

Removing the computer cover
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

CAUTION:
Turn off the computer and wait three to five minutes to let the computer cool before removing the
computer cover.
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
61 and “Locating connectors on the rear of your computer” on page 62.
4. Remove any locking device that secures the computer cover, such as a padlock or an integrated
cable lock.
5. Remove the two screws that secure the computer cover and slide the computer cover to the rear to
remove it.

Figure 6. Removing the computer cover

Removing and reinstalling the front bezel
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to remove and reinstall the front bezel.

Lenovo M4350 Hardware Maintenance Manual

To remove and reinstall the front bezel, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel by releasing the three plastic tabs on the left side and pivoting the front bezel
outward.

Figure 7. Removing the front bezel

Chapter 8. Replacing FRUs

4. To reinstall the front bezel, align the three plastic tabs on the right side of the front bezel with the
corresponding holes in the chassis, then pivot the front bezel inwards until it snaps into position on
the left side.

Figure 8. Reinstalling the front bezel

5. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the primary hard disk drive
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the primary hard disk drive.
To replace the primary hard disk drive, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Locate the primary hard disk drive. See “Locating internal drives” on page 67.
Note: There is also a secondary hard disk drive bay for you to purchase and install a secondary hard
disk drive by yourself. If you want to install a secondary hard disk drive, use the same way of installing
the primary hard disk drive.
4. Disconnect the signal cable and the power cable from the hard disk drive.
5. Remove the four screws that secure the hard disk drive. Then, slide the hard disk drive out of the chassis.

Lenovo M4350 Hardware Maintenance Manual

Figure 9. Removing the primary hard disk drive

6. Slide the new hard disk drive into the hard disk drive bay and align the screw holes in the new hard
disk drive with the corresponding holes in the drive bay. Then, install the four screws to secure the
new hard disk drive in place.

Figure 10. Installing the hard disk drive

Chapter 8. Replacing FRUs

7. Connect one end of the signal cable to the rear of the new hard disk drive and the other end to an
available SATA connector on the system board. See “Locating parts on the system board” on page 66.
Then, locate an available five-wire power connector and connect it to the rear of the new hard disk drive.

Figure 11. Connecting a SATA hard disk drive

8. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the thermal sensor
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “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. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 70.
4. Locate the thermal sensor. See “Locating major FRUs” on page 63.
5. Disconnect the thermal sensor cable from the thermal sensor connector on the system board. See
“Locating parts on the system board” on page 66.

Lenovo M4350 Hardware Maintenance Manual

6. From inside the chassis, pivot the retaining clip 1 that secures the plastic holder of the thermal sensor
inward and then push the clip outward to release the clip. Then disengage the plastic holder holding
the thermal sensor from the chassis.

Figure 12. Removing the thermal sensor

7. Pull the entire thermal sensor out of the chassis.

Chapter 8. Replacing FRUs

8. Insert the connector and cable of the new thermal sensor into the hole 1 in the chassis. Then align the
two tabs on the plastic holder holding the thermal sensor with the two holes 1 and 2 in the chassis,
and push the plastic holder until it snaps into position.

Figure 13. Installing the new thermal sensor

9. Reconnect the thermal sensor cable to the system board. See “Locating parts on the system board”
on page 66.
10. Reinstall the front bezel. See “Removing and reinstalling the front bezel” on page 70.
11. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the front audio and USB assembly
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the front audio and USB assembly.
To replace the front audio and USB assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 70.
4. Locate the front audio and USB assembly.

Lenovo M4350 Hardware Maintenance Manual

5. Disconnect the front audio and USB assembly cables from the system board. See “Locating parts on
the system board” on page 66.
Note: Make sure you note the locations of the cables when you disconnect the cables from the system
board.
6. Remove the screw that secures the front audio and USB assembly bracket to the chassis to remove
the bracket from the chassis.

Figure 14. Removing the front audio and USB assembly

7. Install the new front audio and USB assembly into the chassis and align the screw hole in the bracket
with the corresponding hole in the chassis.
8. Install the screw to secure the new front audio and USB assembly to the chassis.
9. Reconnect the front audio and USB assembly cables to the front audio connector and the front USB
connector on the system board. See “Locating parts on the system board” on page 66.
10. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the optical drive
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to install or replace the optical drive.
Note: The optical drive is only available in some models.
To replace an optical drive, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 70.

Chapter 8. Replacing FRUs

4. Remove the three screws that secure the optical drive. Then, slide the optical drive out of the front
of the computer.

Figure 15. Removing the optical drive

5. Slide the new optical drive into the drive bay from the front and align the screw holes in the new optical
drive with the corresponding holes in the drive bay. Then, install the three screws to secure the new
optical drive in place.

Figure 16. Installing the optical drive

Lenovo M4350 Hardware Maintenance Manual

6. Connect one end of the signal cable to the rear of the new optical drive and the other end to an available
SATA connector on the system board. See “Locating parts on the system board” on page 66. Then,
locate an available five-wire power connector and connect it to the rear of the new optical drive.

Figure 17. Connecting the optical drive

7. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the power supply assembly
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the power supply assembly.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety and proper Underwriters Laboratories (UL) certification.
CAUTION:

Hazardous moving parts. Keep fingers and other body parts away.
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.

Chapter 8. Replacing FRUs

Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. If you suspect a problem with
one of these parts, contact a service technician.
To replace the power supply assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Disconnect the power supply assembly cables from all drives and from the 24-pin power connector and
4-pin power connector on the system board. See “Locating parts on the system board” on page 66.
4. Lay the computer on its side and remove the four screws at the rear of the chassis that secure the
power supply assembly.

Figure 18. Removing the screws for the power supply assembly

5. Slide the power supply assembly to the front of the computer and then lift it out of the chassis.
6. Make sure that the new power supply assembly is the correct replacement. Some power supply
assemblies automatically sense the voltage, some power supply assemblies are voltage specific, and
some power supply assemblies have a voltage-selection switch. If your power supply assembly has
a voltage-selection switch, make sure that you set the voltage-selection switch to match the voltage
available at your electrical outlet. If necessary, use a ballpoint pen to slide the voltage-selection switch
to the correct position.
• If the voltage supply range in your local country or region is 100–127 V ac, set the voltage-selection
switch to 115 V.
• If the voltage supply range in your local country or region is 200–240 V ac, set the voltage-selection
switch to 230 V.
7. Install the new power supply assembly into the chassis so that the screw holes in the power supply
assembly align with those in the chassis.
8. Install and tighten the four screws to secure the power supply assembly.
Note: Use only screws provided by Lenovo.
9. Reconnect the power supply assembly cables to the system board and each of the drives.
10. Secure the power supply assembly cables with the cable clips and ties in the chassis.

Lenovo M4350 Hardware Maintenance Manual

11. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the system fan
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the system fan.
To replace the system fan, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Locate the system fan. See “Locating major FRUs” on page 63.
4. Disconnect the system fan cable from the system fan connector on the system board.
5. The system fan is attached to the chassis by four rubber mounts. Remove the system fan by breaking or
cutting the rubber mounts and gently pulling the system fan out of the chassis.
Note: The new system fan will have four new rubber mounts attached.

Figure 19. Removing the system fan

6. Install the new system fan by aligning the new rubber mounts with the corresponding holes in the
chassis and push the rubber mounts through the holes.
7. Pull on the tips of the rubber mounts until the new system fan is secured in place.

Chapter 8. Replacing FRUs

Figure 20. Installing the system fan

8. Connect the new system fan cable to the system fan connector on the system board. See “Locating
parts on the system board” on page 66.
9. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Installing or replacing a PCI card
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to install or replace a PCI card. Your computer has two PCI
Express x1 card slots and one PCI Express x16 graphics card slot.
To install or replace a PCI card, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.

Lenovo M4350 Hardware Maintenance Manual

3. At the rear of the computer, remove the screw that secures the PCI card latch.

Figure 21. Removing the screw that secures the PCI card latch

4. Depending on whether you are installing or replacing a PCI card, do one of the following:
• If you are installing a PCI card, remove the appropriate metal slot cover.

Chapter 8. Replacing FRUs

• If you are replacing an old PCI card, grasp the old card that is currently installed and gently pull it
out of the slot.

Figure 22. Removing a PCI card

Notes:
a. The card fits tightly into the card slot. If necessary, alternate moving each side of the card a small
amount until it is removed from the card slot.
b. If the card is held in place by a retaining latch, press the card retaining latch 1 as shown to
disengage the latch. Grasp the card and gently pull it out of the slot.

5. Remove the new PCI card from its static-protective package.
6. Install the new PCI card into the appropriate slot on the system board. See “Locating parts on the
system board” on page 66.
Note: If you are installing a PCI Express x16 graphics card, make sure the memory slot retaining clips
are closed before you install the graphics card.

Lenovo M4350 Hardware Maintenance Manual

7. Pivot the card latch to the closed position to secure the PCI card.

Figure 23. Installing a PCI card

8. Reinstall the screw to secure the PCI card latch in place.
9. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the battery
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “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 Safety, Warranty, and Setup Guide for information about
replacing and disposing of the battery.
To replace the battery, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Locate the battery. See “Locating parts on the system board” on page 66.

Chapter 8. Replacing FRUs

4. Remove the old battery.

Figure 24. Removing the old battery

5. Install a new battery.

Figure 25. Installing a new battery

6. Reinstall the computer cover and connect the cables. See “Completing the parts replacement” on
page 103.
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.
7. Turn on the computer and all attached devices.
8. Use the Setup Utility program to set the date, time, and any passwords. See Chapter 5 “Using the Setup
Utility program” on page 49.
9. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Installing or replacing a memory module
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “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 DDR3 UDIMMs that provide up to a maximum of
8 GB system memory. When installing or replacing a memory module, use 1 GB, 2 GB, or 4 GB DDR3
UDIMMs in any combination up to a maximum of 8 GB.
To install or replace a memory module, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Lay the computer on its side for easier access to the system board.
4. Locate the memory slots. See “Locating parts on the system board” on page 66.

Lenovo M4350 Hardware Maintenance Manual

5. Remove any parts that might prevent your access to the memory slots. Depending on your computer
model, you might need to remove the PCI Express x16 graphics card for easier access to the memory
slots. See “Installing or replacing a PCI card” on page 82.
6. Depending on whether you are installing or replacing a memory module, do one of the following:
• If you are replacing an old memory module, open the retaining clips and gently pull the memory
module out of the memory slot.

Figure 26. Removing a memory module

• If you are installing a memory module, open the retaining clips of the memory slot into which you
want to install the memory module.

Figure 27. Opening the retaining clips

Chapter 8. Replacing FRUs

7. Position the new memory module over the memory slot. Make sure that the notch 1 on the memory
module aligns correctly with the slot key 2 on the system board. Push the memory module straight
down into the slot until the retaining clips close.

Figure 28. Installing a memory module

8. Reinstall the PCI Express x16 graphics card if you have removed it.
9. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Replacing the heat sink and fan assembly
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the heat sink and fan assembly.
CAUTION:
The heat sink and fan assembly 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, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Lay the computer on its side for easier access to the system board.
4. Locate the heat sink and fan assembly. See “Locating major FRUs” on page 63.
5. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board. See “Locating parts on the system board” on page 66.

Lenovo M4350 Hardware Maintenance Manual

6. Follow this sequence to remove the four screws that secure the heat sink and fan assembly 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.

Figure 29. Removing the heat sink and fan assembly

7. Lift the failing heat sink and fan assembly off the system board.
Notes:
a. You might have to gently twist the heat sink and fan assembly to free it from the microprocessor.
b. When handling the heat sink and fan assembly, do not touch the thermal grease on the bottom
of the heat sink and fan assembly.
8. Place the new heat sink and fan assembly on the system board so that the four screws are aligned with
the corresponding holes in the system board.
Note: Position the new heat sink and fan assembly so that the heat sink and fan assembly cable is
toward the microprocessor fan connector on the system board.
9. Follow the following sequence to install the four screws to secure the new heat sink and fan assembly.
Do not over-tighten the screws.
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 new heat sink and fan assembly cable to the microprocessor fan connector on the system
board. See “Locating parts on the system board” on page 66.
11. To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Chapter 8. Replacing FRUs

Replacing the microprocessor
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “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. Turn off the computer and wait three to five
minutes to let the computer cool before removing the computer cover.
To replace the microprocessor, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Lay the computer on its side for easier access to the system board.
4. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 88.
Note: Place the heat sink and fan assembly on its side so that the thermal grease on the bottom of it
does not get in contact with anything.
5. Lift the small handle 1 and open the retainer 2 to access the microprocessor 3 .

Figure 30. Accessing the microprocessor

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

Lenovo M4350 Hardware Maintenance Manual

Figure 31. Removing the microprocessor

Notes:
a. Your microprocessor and socket might look different from the one illustrated.
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.
7. Make sure that the small handle is in the raised position and the microprocessor retainer is fully open.
8. Remove the protective cover that protects the gold contacts of the new microprocessor.
9. 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.

Chapter 8. Replacing FRUs

10. Lower the new microprocessor straight down into the microprocessor socket on the system board.

Figure 32. Installing the microprocessor

11. Close the microprocessor retainer and lock it into position with the small handle to secure the new
microprocessor in the socket.
12. Reinstall the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 88.
13. Reconnect all cables that were disconnected from the system board.
14. To complete the replacement, go to “Completing the parts replacement” on page 103.

Replacing the system board
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the system board.
CAUTION:
The heat sink and microprocessor 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 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. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Lay the computer on its side for easier access to the system board.
4. Remove all memory modules and PCI cards that are currently installed. See “Installing or replacing a
memory module” on page 86 and “Installing or replacing a PCI card” on page 82.

Lenovo M4350 Hardware Maintenance Manual

5. Carefully take note of the locations of all cable connections on the system board and disconnect all
the cables. See “Locating parts on the system board” on page 66.
6. Remove the heat sink and fan assembly from the failing system board. See “Replacing the heat sink and
fan assembly” on page 88.
7. Remove the six screws that secure the system board.

Figure 33. Removing the six screws that secure the system board

8. Carefully slide the system board so that it can be released from the mounting studs that secure the
system board in place.
9. Lift the system board out of the chassis.
10. Remove the microprocessor from the failing system board and install it on the new system board.
See “Replacing the microprocessor” on page 90.
11. Install the new system board into the chassis by aligning the six mounting studs in the chassis with the
corresponding holes in the new system board. Carefully slide the new system board into the chassis until
it is secured in place by the mounting studs. Then, install the six screws to secure the system board.
12. Install the heat sink and fan assembly and connect the heat sink and fan assembly cable to the new
system board. See “Replacing the heat sink and fan assembly” on page 88.
13. Install all memory modules and PCI cards removed from the failing system board on the new system
board. See “Installing or replacing a memory module” on page 86 and “Installing or replacing a PCI
card” on page 82.
14. Reconnect all remaining cables to the system board. See “Locating parts on the system board”
on page 66.
15. To complete the replacement, go to “Completing the parts replacement” on page 103.

Chapter 8. Replacing FRUs

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. Lower the microprocessor retainer, and then lower the lever to secure the retainer. Make sure the
lever is locked into position.
4. Note the orientation of the socket cover, and install one side of the socket cover into the microprocessor
socket.

Figure 34. 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 WiFi units
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to replace the WiFi units. The WiFi units include a WiFi adapter
card, a WiFi card module, and a rear WiFi antenna cable.
Replacing the WiFi units involves the following operations:
•

“Removing the WiFi adapter card” on page 94

•

“Removing the WiFi card module” on page 96

•

“Installing the WiFi units” on page 97

Removing the WiFi adapter card
To remove a WiFi adapter card, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.

Lenovo M4350 Hardware Maintenance Manual

3. If your computer comes with a WiFi card module that supports the Bluetooth function, disconnect
the Bluetooth cable from the WiFi adapter card.

Figure 35. Disconnecting the Bluetooth cable

Note: The Bluetooth cable connects the Bluetooth connector on the WiFi adapter card to the front USB
connector on the system board to support the Bluetooth function.
4. At the rear of the computer, remove the screw that secures the PCI card latch.

Chapter 8. Replacing FRUs

5. Grasp the WiFi adapter card that is currently installed and gently pull it out of the slot.

Figure 36. Removing the WiFi adapter card

Note: The card fits tightly into the card slot. If necessary, alternate moving each side of the card a
small amount until it is removed from the card slot.

Removing the WiFi card module
To remove the WiFi card module, do the following:
1. Remove the WiFi adapter card from the computer, and then disconnect the front and rear WiFi antenna
cables from the WiFi card module.

Figure 37. Removing the WiFi antenna cables

Lenovo M4350 Hardware Maintenance Manual

2. Remove the two screws that secure the WiFi card module to the WiFi adapter card.

Figure 38. Removing the screws that secure the WiFi card module

3. Pull the WiFi card module out of the mini PCI Express slot to remove it from the WiFi adapter card.

Figure 39. Removing the WiFi card module

Installing the WiFi units
To install the WiFi units, do the following:

Chapter 8. Replacing FRUs

1. Insert the WiFi card module into the mini PCI Express slot, and then install the two screws to secure
the WiFi card module to the WiFi adapter card.

Figure 40. Installing the WiFi card module

Lenovo M4350 Hardware Maintenance Manual

2. Connect the front antenna cable and rear antenna cable to the WiFi card module.

Figure 41. Installing the WiFi antenna cables

3. Install the WiFi adapter card into the PCI Express x1 slot on the system board. See “Locating parts on
the system board” on page 66.
4. If the installed WiFi card module supports the Bluetooth function, use a Bluetooth cable to connect the
Bluetooth connector on the WiFi adapter card to the front USB connector on the system board.
5. Pivot the card latch to the closed position to secure the WiFi adapter card.

Figure 42. Installing the WiFi adapter card

What to do next:
• To work with another piece of hardware, go to the appropriate section.

Chapter 8. Replacing FRUs

• To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Installing or removing the rear WiFi antenna
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to install or remove the rear WiFi antenna.

Installing the rear WiFi antenna
To install the rear WiFi antenna, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Install the rear WiFi antenna to the rear WiFi antenna cable connector attached on the rear of the
computer.
3. Adjust the angle of the rear antenna to lower the risk of breaking the antenna by accident.

Figure 43. Installing the rear WiFi antenna

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 103.

Removing the rear WiFi antenna
To remove the rear WiFi antenna, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Straighten the rear WiFi antenna so that it can be more easily twisted.

100

Lenovo M4350 Hardware Maintenance Manual

3. Hold the thicker end of the rear WiFi antenna and unscrew the WiFi antenna from the rear of the
computer.

Figure 44. Removing the rear WiFi antenna

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 103.

Installing or removing the front WiFi antenna
Attention:
Do not open your computer or attempt any repair before reading and understanding the Chapter 1 “Safety
information” on page 1.

This section provides instructions on how to install or remove the front WiFi antenna.

Installing the front WiFi antenna
To install the front WiFi antenna, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 70.
4. Peel off the paper that protects the stickers on the front antenna.

Chapter 8. Replacing FRUs

101

Figure 45. Peeling off the paper that protects the stickers

5. Stick the front antenna to the front panel as shown. Then insert the front antenna cable through the
hole in the front panel.

Figure 46. Installing the front WiFi antenna

6. Connect the front antenna cable to the WiFi card module.
What to do next:
• To work with another piece of hardware, go to the appropriate section.

102

Lenovo M4350 Hardware Maintenance Manual

• To complete the installation or replacement, go to “Completing the parts replacement” on page 103.

Removing the front WiFi antenna
To remove the front WiFi antenna, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 69.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 70.
4. Disconnect the front antenna cable from the WiFi card module.
5. Remove the front antenna and cable from the front of the computer.

Figure 47. Removing the front WiFi antenna

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 103.

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 5 “Using the Setup Utility program” on page 49.
To reinstall the computer cover and reconnect cables to your computer, do the following:
1. Make sure that all components have been reassembled correctly and that no tools or loose screws
are left inside your computer. See “Locating major FRUs” on page 63 for the locations of various
components in your computer.
2. Make sure that the cables are routed correctly. Keep cables clear of the hinges and sides of the
computer chassis to avoid interference with closing the computer cover.

Chapter 8. Replacing FRUs

103

3. If you have removed the front bezel, reinstall it. See “Removing and reinstalling the front bezel” on
page 70.
4. Position the computer cover on the chassis so that the rail guides on the bottom of the computer
cover engage the rails on the chassis. Then, push the cover to the front of the computer until it snaps
into position.

Figure 48. Reinstalling the computer cover

5. If there is a padlock available, lock the computer cover.
6. If there is an integrated cable lock available, lock the computer.
7. Reconnect the external cables and power cords to the computer. See “Locating connectors on the
rear of your computer” on page 62.
8. To update your configuration, refer to Chapter 5 “Using the Setup Utility program” on page 49.
Note: In most areas of the world, Lenovo requires the return of the defective Customer Replaceable Unit
(CRU). Information about this will come with the CRU or will come a few days after the CRU arrives.

104

Lenovo M4350 Hardware Maintenance Manual

Chapter 9. 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

Hardware-controlled passwords
Use the Setup Utility program to set the hardware controlled passwords. For more information about
passwords, see “Using passwords” on page 49.

Operating system password
Note: This section applies only to computer models that have an operating system preinstalled from Lenovo.
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 correct 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 105.

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 Standard CMOS Features.
• 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 105.
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 53.

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

105

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 49.
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 53.
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 49.
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 53.
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.

106

Lenovo M4350 Hardware Maintenance Manual

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. Do the following to locate the downloadable files for your machine type:
a. Click Download & Drivers.
b. In the left pane, click Downloads and drivers.
c. From the Brand drop-down list box, select Desktops.
d. From the Family drop-down list box, select the family name.
e. Click Continue.
f. From the Refine results drop-down list box, select BIOS.
g. Click the BIOS update link.
3. Click the TXT file that contains the instructions for updating (flashing) the BIOS from your operating
system.
4. Print these instructions. This is very important because these instructions will not be displayed on
the screen after the download begins.
5. Follow the printed instructions to download, extract, and install the update.

Recovering from a POST and 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 69.
3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system
board” on page 66.
4. Remove any parts and disconnect any cables that might prevent your 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. Reinstall any parts and reconnect any cables that have been removed or disconnected.
7. Reinstall the computer cover and reconnect the power cords for the computer and monitor. See
“Completing the parts replacement” on page 103.
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 jumper back to the standard position (pin 1 and pin 2).
12. Reinstall any parts and reconnect any cables that have been removed or disconnected.
13. Reinstall the computer cover and reconnect power cords and all other external cables. See “Completing
the parts replacement” on page 103.

Chapter 9. Additional service information

107

14. Turn on the computer to restart the operating system.

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 some monitors.

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.

108

Lenovo M4350 Hardware Maintenance Manual

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.

109

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
Microsoft and Windows are trademarks of the Microsoft group of companies.
Intel is the trademark of Intel Corporation in the United States, other countries, or both.
Other company, product, or service names may be trademarks or service marks of others.

110

Lenovo M4350 Hardware Maintenance Manual

Index
A

front bezel, removing 70
front bezel, reinstalling 70
front WiFi antenna, installing, removing
FRU part numbers 61
FRUs, replacing 69

Administrator, password 50
audio line-in connector 62
audio line-out connector 62

101

basic troubleshooting 31
battery, replacing 85
BIOS settings, changing 53
Boot-block Recovery 107

hard disk drive, replacing 72
heat sink and fan assembly, replacing

I
C

Identifying FRUs 63
installing
operating system 53
installing options
memory module 86
PCI card 82

changing
password 50
startup device sequence 52
CMOS, clearing 51
computer cover
removing 69
computer cover, reinstalling 103
connector 62
connectors
rear 62
connectors, controls, indicators
front 61
considerations, passwords 50
CRU
completing the installation 103

L
Lenovo Solution Center 47
locating FRUs 63
looking up part numbers 61

M
memory module
installing, replacing 86
system board 86
Microphone connector 63
microprocessor
replacing 90

D
deleting a password 50
Description 62
devices, handling static-sensitive
diagnostics, troubleshooting 31
drives
bays 67
specifications 67

O
optical drive, replacing

E
environment, operating 27
Ethernet connector 63
exiting, Setup Utility 53

F
failure, recovering from a POST and BIOS update
flashing the BIOS 106
front
connectors, controls, indicators 61
front audio and USB assembly, replacing 76
front bezel

107

part numbers 61
parts replacement, completing 103
password
Administrator 50
considerations 50
Power-On Password 50
setting, changing, deleting 50
passwords
erasing 51
lost or forgotten 51
passwords, using 49
PCI card 82
installing, replacing 82

111

slots 82
power supply assembly, replacing
Power-On, Password 50

U
79

R
rear connectors 62
rear WiFi antenna, installing, removing 100
recovering
from a POST and BIOS update failure 107
recovery
Boot-block Recovery 107
removing computer cover 69
replacing
battery 85
hard disk drive 72
heat sink and fan assembly 88
microprocessor 90

S
security
enabling or disabling 51
selecting
startup device 51
temporary startup device 52
serial port 63
setting
password 50
settings
changing 49
viewing 49
Setup Utility 49
Setup Utility program, starting 49
Setup Utility, exiting 53
specifications 27
starting the Setup Utility program 49
startup device 51
sequence, changing 52
temporary, selecting 52
static-sensitive devices, handling 69
support web site
support 28
support, web site 28
system board
connectors 66
locating parts 66
locations 66
memory module 86
system fan, replacing 81

T
temporary startup device 52
the BIOS, updating (flashing) 106–107
thermal sensor, replacing 74
troubleshooting, basic 31
troubleshooting, diagnostics 31

112

Lenovo M4350 Hardware Maintenance Manual

updating
(flashing) the BIOS 106
updating (flashing) the BIOS
USB connector 63
using
passwords 49
Setup Utility 49

107

V
VGA monitor connector 63
viewing and changing settings

W
WiFi units, WiFi adapter card, WiFi card module, WiFi
antenna cable, replacing 94

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.4
Linearized                      : No
Page Count                      : 120
Page Layout                     : SinglePage
EPS Processor                   : PStill version 1.74.14
JPEG Quality                    : 80
Compression Level               : 6
Compression Type                : auto
Graphics Resolution Threshold   : 900
Graphics Resolution             : 600
Config File                     : D:\PTC\Arbortext PE\lib\standard.pdfcf
Creator                         : Arbortext 5.4
Create Date                     : 2013:09:02 03:42:44+08:00
Producer                        : PDFlib+PDI 7.0.4 (Win32)

EXIF Metadata provided by EXIF.tools

Lenovo M4350 Hmm 20130903 User Manual Hardware Maintenance Desktop (Lenovo) Type 10154

Navigation menu

Versions of this User Manual:

Views

Navigation