Lenovo Hardware Maintenance Manual (English) (HMM) Think Pad X1 Carbon Gen 6th (Type 20KH, 20KG) Laptop (Think Pad) Type 20KG 6thgen Hmm En

2018-03-09

User Manual: Lenovo (English) Hardware Maintenance Manual (HMM) - ThinkPad x1 Carbon Gen 6th X1 Carbon 6th Gen - (Type 20KH, 20KG) Laptop (ThinkPad) - Type 20KG 20KG

Open the PDF directly: View PDF .
Page Count: 100

Download
Open PDF In Browser	View PDF

Hardware Maintenance Manual

Machine Types: 20KH and 20KG

Note: Before using this information and the product it supports, be sure to read the general information
under Appendix A “Notices” on page 91.

First Edition (January 2018)
© Copyright Lenovo 2018.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS35F-05925.

Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . .
Electrical safety . . . . . . . . . . . . . .
Safety inspection guide . . . . . . . . . . .
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . .
Grounding requirements . . . . . . . . . .
Safety notices (multilingual translations) . . . .

. . 1
. . 1
. . 2
. . 3
. . 4
. . 4

Chapter 2. Important service
information . . . . . . . . . . . . . . . 21
Strategy for replacing FRUs . . . . . . . . .
Strategy for replacing an M.2 solid-state
drive . . . . . . . . . . . . . . . .
Important notice for replacing a system
board . . . . . . . . . . . . . . . .
How to use error message . . . . . . . .
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . .
Product definition . . . . . . . . . . .
FRU identification . . . . . . . . . . .

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

33
34
34
35
35
35
36
37
38
39
39
40

Chapter 6. Locations . . . . . . . . . 43

.
.

22
22

.
.
.

22
22
23

Computer controls, connectors, and indicators
Front view . . . . . . . . . . . . .
Left-side view . . . . . . . . . . . .
Right-side view . . . . . . . . . . .
Rear view . . . . . . . . . . . . .
Bottom view . . . . . . . . . . . .
Status indicators . . . . . . . . . .
Locating FRUs and CRUs . . . . . . . . .
Major FRUs . . . . . . . . . . . .
LCD FRUs . . . . . . . . . . . . .
Miscellaneous parts and other FRUs . . .
Connector and cable guide . . . . . .
Looking up FRU information . . . . . . . .

.
.
.
.
.
.
.
.

25
26
26
27
27
27
28
28

.
.

29
29

Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Recovery information . . . . . . . . . . .
Resetting your computer . . . . . . . .
Using advanced startup options . . . . .
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . .
Creating and using a recovery USB drive . .
Passwords. . . . . . . . . . . . . . . .
Power-on password . . . . . . . . . .
Hard disk password . . . . . . . . . .
Supervisor password . . . . . . . . . .

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

Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . .
Checkout guide . . . . . . . . . . . . . .
Diagnosing problems . . . . . . . . . .
Quick test programs . . . . . . . . . .
UEFI diagnostic program . . . . . . . .
Bootable diagnostic programs . . . . . .
Power system checkout . . . . . . . . . .
Checking the ac power adapter . . . . . .
Checking the built-in battery and operational
charging . . . . . . . . . . . . . . .
Checking the coin-cell battery . . . . . .

How to remove the power-on password
How to remove the hard disk password.
Power management . . . . . . . . . .
Sleep mode . . . . . . . . . . .
Hibernation mode . . . . . . . . .
Symptom-to-FRU index . . . . . . . .
Numeric error codes . . . . . . . .
Error messages . . . . . . . . . .
Beep errors. . . . . . . . . . . .
LCD-related symptoms . . . . . . .
Intermittent problems . . . . . . . .
Undetermined problems . . . . . .

.
.
.

31
31
31

.
.
.
.
.
.

31
32
32
33
33
33

Chapter 5. Special keys . . . . . . . . 41
.
.
.
.
.
.
.
.
.
.
.
.
.

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

43
43
44
44
44
45
45
47
48
50
52
52
56

Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . . . 57
Common service tools . . . . . . . . . .
Screw notices . . . . . . . . . . . . .
Retaining serial numbers . . . . . . . . .
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . .
Retaining the UUID. . . . . . . . . .
Reading or writing the ECA information . .

. .
. .
. .

57
57
58

. .
. .
. .

58
59
60

Chapter 8. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 61
General guidelines. . . . . . . . .
Before servicing the computer . . . .
Removing external devices . . .
Disabling the built-in battery . . .
Removing the nano-SIM-card tray .

.
.
.
.
.

61
62
62
62
62

Removing the dummy microSD card . .
Removing a major FRU . . . . . . . . .
1010 Base cover assembly . . . . .
1020 M.2 solid-state drive . . . . . .
1030 Wireless-LAN card . . . . . .
1040 Wireless-LAN antenna kit . . . .
1050 Wireless-WAN card . . . . . .
1060 Thermal fan assembly . . . . .
1070 USB card with cable . . . . . .
1080 SD support bracket . . . . . .
1090 Built-in battery . . . . . . . .
1100 NFC card . . . . . . . . . .
1110 Trackpad cable . . . . . . . .
1120 Trackpad assembly . . . . . .
1130 Audio card with audio-card cable .
1140 Speaker assembly . . . . . . .
1150 Coin-cell battery . . . . . . .

Hardware Maintenance Manual

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

62
63
63
64
65
66
67
67
68
69
70
72
73
74
76
77
78

1160 Wireless-WAN antenna kit or wirelessWAN antenna filler . . . . . . . . . . .
1170 System board assembly . . . . . .
1180 Power button card assembly. . . . .
1190 LCD unit . . . . . . . . . . . .
Removing an LCD FRU . . . . . . . . . . .
2010 LCD-bezel assembly, protection plate
assembly, and metal protection plate . . .
2020 Hinges and LCD bottom bezel . . . .
2030 LCD panel assembly and LCD cable. .
2040 Camera shutter, camera card, and
camera/LED cable (for models without
infrared camera) . . . . . . . . . . . .
2050 Camera card, and camera cable (for
models with infrared camera) . . . . . . .

.
.
.
.
.

78
80
82
83
84

.
.
.

84
85
86

Appendix A. Notices . . . . . . . . . . 91
Electronic emissions notices . . . . . . . . . .
Trademarks . . . . . . . . . . . . . . . .

92
92

About this manual
This manual contains service and reference information for the following ThinkPad® products.
ThinkPad X1 Carbon

Machine Types: 20KG and 20KH

Use this manual along with the advanced diagnostic tests to troubleshoot problems.
Important: This manual is intended only for trained service technicians who are familiar with ThinkPad
products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.
Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information”
on page 1 and Chapter 2 “Important service information” on page 21.

iii

Hardware Maintenance Manual

Chapter 1. Safety information
This chapter presents following safety information that you must be familiar with before you service a
ThinkPad notebook computer.
• “General safety” on page 1
• “Electrical safety” on page 1
• “Safety inspection guide” on page 2
• “Handling devices that are sensitive to electrostatic discharge” on page 3
• “Grounding requirements” on page 4
• “Safety notices (multilingual translations)” on page 4

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. Make sure that 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 object that weighs more than 16 kg (35 lb) or that you
think is 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, make sure that other service technicians 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 toolcase 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. Make sure 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, about 8
centimeters (3 inches) from the end.
Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.

Attention: 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.
• Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan
louvers or cover them with labels or stickers.

Electrical safety
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 electrical shock.

• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
– Removing or installing main units
• 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 have 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.
Attention: 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.

•
•
•
•
•
•

•

Attention: An electrical shock can occur only when there is a complete circuit. By observing the above
rule, you may prevent a current from passing through your body.
– When using testers, 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; Instructions for these
precautions 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
– Similar units as listed above
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.

Safety inspection guide
The purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each
machine was designed and built, required safety items were installed to protect users and service
technicians from injury. This guide addresses only those items. You should use good judgment to identify
potential safety hazards due to attachment of non-ThinkPad 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.

Hardware Maintenance Manual

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 a bulging capacitor
• Mechanical hazards, such as loose or missing hardware
To determine whether there are any potentially unsafe conditions, use the following checklist at the
beginning of every service task. 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 the frame ground.
b. The power cord should be the authorized type specified for your computer. Go to:
https://support.lenovo.com/partslookup
c. Insulation must not be frayed or worn.
4. Check for cracked or bulging batteries.
5. Remove the cover.
6. Check for any obvious non-ThinkPad alterations. Use good judgment as to the safety of any nonThinkPad alterations.
7. 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.
8. Check for worn, frayed, or pinched cables.
9. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered
with.

Handling devices that are sensitive to electrostatic discharge
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.
• 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 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 to guard against ESD damage is desirable but not necessary.
– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.
Chapter 1. Safety information

– When working on a double-insulated or battery-operated system, use an ESD common ground or
reference point. 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 (multilingual translations)
The safety notices in this section are provided in the following languages:
• English
• Arabic
• Brazilian Portuguese
• French
• German
• Hebrew
• Japanese
• Korean
• Spanish
• Traditional Chinese

DANGER

Hardware Maintenance Manual

DANGER

Chapter 1. Safety information

Hardware Maintenance Manual

PERIGO

Chapter 1. Safety information

PERIGO

Hardware Maintenance Manual

PERIGO

DANGER

Chapter 1. Safety information

DANGER

VORSICHT

Hardware Maintenance Manual

VORSICHT

Chapter 1. Safety information

VORSICHT

Hardware Maintenance Manual

Chapter 1. Safety information

Hardware Maintenance Manual

Chapter 1. Safety information

Hardware Maintenance Manual

Chapter 1. Safety information

Hardware Maintenance Manual

Chapter 1. Safety information

Hardware Maintenance Manual

Chapter 2. Important service information
This chapter introduces following important service information that applies to all machine types supported
by this manual:
• “Strategy for replacing FRUs” on page 21
– “Strategy for replacing an M.2 solid-state drive” on page 21
– “Important notice for replacing a system board” on page 22
– “How to use error message” on page 22
• “Strategy for replacing FRUs for CTO, special-bid, and standard models” on page 22
– “Product definition” on page 22
– “FRU identification” on page 23
Important:
• Advise customers to contact the Lenovo® Support Web site at http://www.lenovo.com/support to view
the software fixes, download the drivers, and follow the on-screen instructions to install the drivers. For
additional assistance, customers might call the Lenovo Customer Support Center. Telephone numbers for
the Lenovo Support Center are available at:
https://pcsupport.lenovo.com/supportphonelist
• Service training documents for Lenovo authorized service technicians are available at the following Web
site. The disassembly and reassembly videos that show the FRU removal and replacement procedures
are contained in the documents.
https://www.lenovoservicetraining.com/ion/

Strategy for replacing FRUs
Before replacing parts:
Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before replacing any FRUs
listed in this manual.
After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before
completing the service action.
To download software fixes, drivers, and UEFI BIOS, go to https://support.lenovo.com and follow the
instructions on the screen.
Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:
• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the
original FRU before you continue.
• Some computers have both a processor board and a system board. If you are instructed to replace either
the processor board or the system board, and replacing one of them does not correct the problem,
reinstall that board, and then replace the other one.
• If an adapter or a device consists of more than one FRU, any of the FRUs may be the cause of the error.
Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change.
Replace only the FRU that changed the symptoms.

Strategy for replacing an M.2 solid-state drive
Always try to run a low-level format before replacing an M.2 solid-state drive (SSD). This will cause all
customer data on the M.2 SSD to be lost. Be sure that the customer has a current backup of the data before
doing this task.

Attention: The drive startup sequence in the computer you are servicing may have been changed. Be
extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect
drive, data or programs can be overwritten.

Important notice for replacing a system board
Some components mounted on a system board are very sensitive. Improper handling of a system board can
damage those components, and may cause a system malfunction.
Attention: When handling a system board:
• Do not drop a system board or apply any excessive force to it.
• Avoid rough handling of any kind.
• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array)
chipset.

How to use error message
Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed,
begin the diagnosis with the first error code. Whatever causes the first error code may also cause false error
codes. If no error code is displayed, see whether the error symptom is listed in the Symptom-to-FRU Index
for the computer you are servicing.

Strategy for replacing FRUs for CTO, special-bid, and standard models
This topic provides information about the model types and FRU identification.

Product definition
This topic introduces different model types and how to identify each type.
Dynamic configure-to-order (CTO) model
This model provides the ability for a customer to configure a Lenovo solution from a Web site, and have this
configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and
eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.
The model is “CTO1” and the default country code is “WW” (example: 20A7CTO1WW).
Special-bid model
This is a unique configuration that has been negotiated between Lenovo and the customer. A unique
machine type model (MTM) consists of a 4-character MT, a 4-character model, and a numeric 2-character
country code is provided to the customer to place orders (example: 20A7000955). The country code
assigned is numeric and does not designate a specific country or region. The custom model factsheet for the
MTM indicates which country the special bid MTM is set up for. Special-bid offering is not generally
announced.
Standard model
Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the
machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country
code. The country code assigned is alphabetic and represents a designated country or region (example:
20A70009UK).

Hardware Maintenance Manual

FRU identification
Use Lenovo eSupport to identify major FRUs, FRU part numbers, and FRU descriptions for a product at an
MT - serial number level. Examples of major FRUs are hard disk drive, system board, and liquid crystal
display (LCD).
To identify the major FRUs for a product, do the following:
1. Go to https://support.lenovo.com/partslookup.
2. Type the Machine Type and Serial Number in the corresponding fields.
3. Click Submit.
eSupport also can be used to view the general FRU list for a product. The FRU list is a general list of
components and does not contain specific model information.
To get the general FRU list for a product, do the following:
1. Go to https://support.lenovo.com.
2. Follow the instructions on the screen to select a product.
3. Click the Product & Parts tab.
4. Select System Service Parts to view a general FRU list.

Chapter 2. Important service information

Hardware Maintenance Manual

Chapter 3. General checkout
This chapter introduces following information:
• “What to do first” on page 25
• “Checkout guide” on page 26
– “Diagnosing problems” on page 26
– “Quick test programs” on page 27
– “UEFI diagnostic program” on page 27
– “Bootable diagnostic programs” on page 27
• “Power system checkout” on page 28
Before you go to the checkout guide, be sure to read the following important notes.
Important notes:
• Only certified trained personnel should service the computer.
• Before replacing any FRU, read the entire page on removing and replacing FRUs.
• When you replace FRUs, it is recommended use new nylon-coated screws.
• Be extremely careful during such write operations as copying, saving, or formatting. The sequence
of the drives in the computer that you are servicing might have been altered. If you select an incorrect
drive, data or programs might be overwritten.
• Replace a FRU only with another FRU of the correct model. When you replace a FRU, ensure that the
model of the machine and the FRU part number are correct by referring to the Web site:
https://support.lenovo.com/partslookup
• A FRU should not be replaced because of a single, unreproducible failure. Single failures can occur
for various reasons that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic
discharge, or software errors. Consider replacing a FRU only when a problem recurs. If you suspect that a
FRU is defective, clear the error log and run the test again. If the error does not recur, do not replace the
FRU.
• Be careful not to replace a nondefective FRU.

What to do first
When you return a FRU, you must include the following information in the parts exchange form or parts return
form that you attach to it:
1. Name and phone number of service technician
2. Date of service
3. Date on which the machine failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the display, and beep symptoms
6. Procedure index and page number in which the failing FRU was detected
7. Failing FRU name and part number
8. Machine type, model number, and serial number
9. Customer's name and address
Note: During the warranty period, the customer may be responsible for repair costs if the computer damage
was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper
maintenance by the customer. Following is a list of some common items that are not covered under warranty
and some symptoms that might indicate that the system was subjected to stress beyond normal use.

Before checking problems with the computer, determine whether the damage is covered under the warranty
by referring to the following list:
The following are not covered under warranty:
• LCD panel cracked from the application of excessive force or from being dropped
• Scratched (cosmetic) parts
• Distortion, deformation, or discoloration of the cosmetic parts
• Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force
• Damage caused by liquid spilled into the system
• Damage caused by the improper insertion of a PC card or the installation of an incompatible card
• Improper disc insertion or use of an optical drive
• Fuses blown by attachment of a nonsupported device
• Forgotten computer password (making the computer unusable)
• Sticky keys caused by spilling a liquid onto the keyboard
• Use of an incorrect ac power adapter on laptop products
The following symptoms might indicate damage caused by nonwarranted activities:
• Missing parts might be a symptom of unauthorized service or modification.
• Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard
disk drive might have been dropped or subject to excessive force.

Checkout guide
Use the following procedures as a guide in identifying and correcting problems with the ThinkPad notebook
computers.
Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products,
prototype cards, or modified options can lead to false indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as possible.
2. Verify the symptoms. Try to re-create the failure by running the diagnostic test or by repeating the
operation.

Diagnosing problems
Many computer problems can be solved without outside assistance. If you experience a problem with your
computer, the first place to start is the troubleshooting information in your computer documentation. If you
suspect a software problem, see the documentation, including readme files and help information systems,
that come with the operating system or program.
Lenovo Companion or Lenovo Vantage is preinstalled on your computer. It supports the hardware scan
function. It combines diagnostic tests, system information collection, security status, and support
information, along with hints and tips for optimal system performance.
Note: If you are unable to isolate and repair the problem yourself after running the program, save and print
the log files created by the program. You need the log files when you speak to a Lenovo technical support
representative.
The troubleshooting information or the diagnostic programs might tell you that you need additional or
updated device drivers or other software. You can get the latest technical information and download device
drivers and updates from the Lenovo Support Web site at:
https://support.lenovo.com
For additional information, see the help system of the program.

Hardware Maintenance Manual

Quick test programs
Lenovo provides quick test programs to troubleshoot and resolve computer problems, especially when the
computer does not have the Lenovo Solution Center program installed.
To download and install a quick test program, go to https://www.lenovo.com/diags, and follow the instructions
on the Web site.
To run a test using quick test program, do the following:
1. Go to the C:\SWTOOLS\ldiag directory.
2. Double-click the gui_lsc_lite.exe file.
3. When the User Account Control window opens, click Yes.
4. Select the device class to be tested.
5. Select the devices to be tested.
6. Select the test to be performed.
7. Follow the instructions on the screen to start the test. When a problem is detected, information
messages are displayed. Refer to the messages to troubleshoot the problem.

UEFI diagnostic program
A UEFI diagnostic program is preinstalled on the computer. It enables you to test internal storage devices,
view system information, and check and recover bad sectors on internal storage devices.
To run the UEFI diagnostic program, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page 28,
and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on page 35
for error code descriptions and troubleshooting hints.
2. When the ThinkPad logo is displayed, repeatedly press and release the F10 key. The main screen of the
UEFI diagnostic program is displayed.
3. Follow the instructions on the screen to use the diagnostic program.

Bootable diagnostic programs
If the computer you are servicing is not installed with the UEFI diagnostic program, you can download a
bootable diagnostic program from the Lenovo Support Web site. The bootable diagnostic programs enable
you to test computer memory and internal storage devices, view system information, and check and recover
the internal storage devices. To use the bootable diagnostic programs, you can create a bootable diagnostic
medium on a USB device or CD.
To create a bootable diagnostic medium, do the following:
1. Go to https://www.lenovo.com/diags.
2. Click Lenovo Bootable Diagnostics.
3. Follow the instructions on the Web site to create a bootable diagnostic medium on a USB device or CD.
To use the diagnostic medium you have created, do one of the following:
• If you have created the bootable diagnostic medium on a USB device, do the following:
1. Attach the USB device to the computer.
2. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 35 for error code descriptions and troubleshooting hints.

Chapter 3. General checkout

3. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
4. Use the arrow keys to select USB HDD and then press Enter. The diagnostic program will be
launched automatically.
5. Follow the instructions on the screen to use the diagnostic program.
• If you have created the bootable diagnostic medium on a CD, do the following:
1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page
28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on
page 35 for error code descriptions and troubleshooting hints.
2. Insert the CD into the external optical drive.
3. Restart the computer.
4. When the ThinkPad logo is displayed, repeatedly press and release the F12 key. When the Boot Menu
window opens, release the F12 key.
5. Use the arrow keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. The diagnostic program will
be launched automatically.
6. Follow the instructions on the screen to use the diagnostic program.

Power system checkout
To verify if a battery and an ac power adapter are functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery or the ac power
adapter is functional.
4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is
still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means
that the battery is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
• “Checking the ac power adapter” on page 28
• “Checking the built-in battery and operational charging” on page 29
• “Checking the coin-cell battery” on page 29

Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
• If the power problem occurs only when the docking station is used, replace the docking station.
• If the system status indicator does not blink three times when an ac power source is connected, check the
power cord of the ac power adapter for correct continuity and installation.
Ensure that you use the USB-C type ac power adapter that is shipped with the computer to provide enough
power to the computer. Otherwise, a message will be displayed, prompting you that the computer will not be
charged or will be charged slowly.
Note: Noise from the ac power adapter does not always indicate a defect.
To check the ac power adapter, do the following:
1. Connect the computer to a power outlet and turn on the computer.
2. Start Lenovo Companion program or Lenovo Vantage, and then click Hardware Settings ➙ Power. The
ac power adapter information is displayed.

Hardware Maintenance Manual

If the ac power adapter is working but the computer does not charge during operation, go to “Checking the
built-in battery and operational charging” on page 29.

Checking the built-in battery and operational charging
This computer supports only batteries specially designed for this specific system and manufactured by
Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed
for other systems. If an unauthorized battery or a battery designed for another systems is installed, the
system will not charge.
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
Move your pointer to the battery-status icon in the Windows notification area to check the battery status. The
battery-status icon displays the percentage of battery power remaining and how long you can use your
computer before you must charge the battery.
To check whether the battery charges properly during operation, do the following:
1. Discharge the battery until the remained battery power is less than 50%.
2. Connect the computer to ac power to charge the battery. If the battery status icon in the Windows
notification area indicates that the battery is not charging, remove the battery and let it return to room
temperature.
3. Reinstall the battery. If the battery is still not charging, replace the battery.
4. Check the battery status icon again. If the same error still exists, replace the system board.

Checking the coin-cell battery
To check the coin-cell battery, do the following:
1. Disable the built-in battery. See “Disabling the built-in battery” on page 62.
2. Remove the coin-cell battery. See “1170 System board assembly” on page 80.
3. Measure the voltage of the coin-cell battery. See the following illustration.

Wire

Voltage (V dc)

Red

+2.5 to +3.2

Black

Ground

• If the voltage is correct, replace the system board.
• If the voltage is not correct, replace the coin-cell battery.
• If the coin-cell battery discharges quickly after replacement, replace the system board.

Chapter 3. General checkout

Hardware Maintenance Manual

Chapter 4. Related service information
Service Web site: When the latest maintenance diskette and the system program service diskette become
available, they will be posted on https://support.lenovo.com.

Recovery information
This chapter provides information about the Windows recovery solutions on the Windows 10 operating
system.

Resetting your computer
If your computer does not perform well, you might consider resetting your computer. In the resetting
process, you can choose to keep your files or remove them, and then reinstall the Windows operating
system.
To reset your computer, do the following:
Note: The items in the graphical user interface (GUI) might change without notice.
1. Open the Start menu, and then click Settings ➙ Update & Security ➙ Recovery.
2. In the Reset this PC section, click Get started.
3. Follow the instructions on the screen to reset your computer.

Using advanced startup options
The advanced startup options enable you to do the following:
• Change the firmware settings of the computer
• Change the startup settings of the Windows operating system
• Start the computer from an external device
• Restore the Windows operating system from a system image
To use advanced startup options, do the following:
Note: The items in the graphical user interface (GUI) might change without notice.
1. Open the Start menu, and then click Settings ➙ Update & security ➙ Recovery.
2. In the Advanced startup section, click Restart now ➙ Troubleshoot ➙ Advanced options.
3. Select a startup option you want, and then follow the instructions on the screen.

Recovering your operating system if Windows 10 fails to start
The Windows recovery environment on your computer operates independently from the Windows 10
operating system. It enables you to recover or repair the operating system even if the Windows 10 operating
system fails to start.
After two consecutive failed boot attempts, the Windows recovery environment starts automatically. Then
you can choose repair and recovery options by following the on-screen instructions.
Note: Ensure that your computer is connected to ac power during the recovery process.

Creating and using a recovery USB drive
You can create a recovery USB drive as a backup for the Windows recovery programs. With the recovery
USB drive, you can troubleshoot and fix the problems even if the preinstalled Windows recovery programs
are damaged.
It is recommended that you create a recovery USB drive as early as possible. If you did not create a recovery
USB drive as a precautionary measure, you can contact Lenovo Customer Support Center and purchase one
from Lenovo. For a list of the Lenovo Support phone numbers for your country or region, go to:
https://pcsupport.lenovo.com/supportphonelist
Creating a recovery USB drive
To create a recovery USB drive, you need a USB drive with at least 16 GB of storage capacity. The actual
USB capacity that is required depends on the size of the recovery image.
Attention: The creation process will delete anything stored on the USB drive. To avoid data loss, make a
backup copy of all the data that you want to keep.
To create a recovery USB drive, do the following:
Note: Ensure that your computer is connected to ac power during the following process.
1. Connect a proper USB drive (at least 16 GB of storage) to the computer.
2. Type recovery in the search box on the taskbar. Then click Create a recovery drive.
3. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.
4. In the Recovery Drive window, follow the instructions on the screen to create a recovery USB drive.
Using the recovery USB drive
To use a recovery USB drive, do the following:
Note: Ensure that your computer is connected to ac power during the following process.
1. Connect the recovery USB drive to the computer.
2. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press F12. The
Boot Menu window opens.
3. Select the recovery USB drive as the boot device.
4. Select a preferred keyboard layout.
5. Click Troubleshoot to display optional recovery solutions.
6. Select a corresponding recovery solution according to your situation. Then follow the instructions on the
screen to complete the process.

Passwords
As many as three passwords may be needed for any ThinkPad notebook computer: the power-on password,
the hard disk password, and the supervisor password.
If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the
computer is turned on. The computer does not start until the password is entered.
Note: If only a supervisor password is set, the password prompt will not be displayed when the operating
system is started.

Hardware Maintenance Manual

Power-on password
A power-on password protects the system from being powered on by an unauthorized person. The
password must be entered before an operating system can be started. For instructions on how to remove the
power-on password, see “How to remove the power-on password” on page 33.

Hard disk password
There are two kinds of hard disk passwords:
• User hard disk password - for the user
• Master hard disk password - for the system administrator, who can use it to get access to the hard disk
even if the user has changed the user hard disk password
Note: There are two modes for the hard disk password: User only and Master + User. The Master + User
mode requires two hard disk passwords; the system administrator enters both in the same operation. The
system administrator then provides the user hard disk password to the system user.
Attention: If the user hard disk password has been forgotten, check whether a master hard disk password
has been set. If it has, it can be used for access to the hard disk drive. If no master hard disk password is
available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the
user or the master hard disk password, or to recover data from the hard disk drive. The hard disk drive can
be replaced for a scheduled fee.
For how to remove the hard disk password, see “How to remove the hard disk password” on page 34.

Supervisor password
The supervisor password protects the system information stored in the ThinkPad Setup program. It provides
the following security features:
• If only a supervisor password is set, a password prompt is displayed when you try to start the ThinkPad
Setup program. Unauthorized users cannot change most of the system configuration options in the
ThinkPad Setup program without the password.
• The system administrator can use the supervisor password to access a computer even if the user of that
computer has set a power-on password. The supervisor password overrides the power-on password.
• The system administrator can set the same supervisor password on many ThinkPad notebook computers
to make administration easier.
Attention: If the supervisor password has been forgotten and cannot be made available to the service
technician, there is no service procedure to reset the password. The system board must be replaced for a
scheduled fee.

How to remove the power-on password
To remove a power-on password, do the following:
If no supervisor password has been set, do the following to remove the power-on password:
1. Turn off the computer and disconnect ac power.
2. Disable the built-in battery. See “Disabling the built-in battery” on page 62.
3. Remove the base cover assembly. See “1010 Base cover assembly” on page 63.
4. Remove the internal battery pack. See “1090 Built-in battery” on page 70.
5. Remove the coin-cell battery. See “1150 Coin-cell battery” on page 78.
6. Reinstall the coin-cell battery.
7. Reinstall the internal battery pack.

Chapter 4. Related service information

8. Reinstall the base cover assembly.
9. Reconnect ac power.
10. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does
not appear. The power-on password has been removed.
If a supervisor password has been set and is known to the service technician, do the following to remove the
power-on password:
1. Turn on the computer.
2. When the ThinkPad logo is displayed, immediately press F1.
3. Type the supervisor password to enter the ThinkPad Setup program.
4. Select Security.
5. Select Password.
6. Select Power-On Password.
7. Type the current supervisor password in the Enter Current Password field. Then leave the Enter New
Password field blank, and press Enter twice.
8. In the Changes have been saved window, press Enter.
9. Press F10 to save changes and exit the ThinkPad Setup program. The power-on password has been
removed.

How to remove the hard disk password
Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be
made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide
any services to reset the user hard disk passwords, or to recover data from the hard disk drive. To put the
system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to
replace the hard disk drive (HDD) or SSD with a scheduled fee.
To remove a user hard disk password that has been forgotten, when the supervisor password and master
hard disk password are known, do the following:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter the ThinkPad Setup program. When
the power-on password icon is displayed on the screen, enter either the power-on password or the
supervisor password.
3. When the user hard disk password icon is displayed on the screen, press F1. The master hard disk
password icon is displayed.
4. Enter the master hard disk password to enter the ThinkPad Setup program.
5. Select Security.
6. Select Password.
7. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens.
8. Select Master hard disk password.
9. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
10. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the
master hard disk password have been removed.

Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep, and
hibernation.

Hardware Maintenance Manual

Sleep mode
When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank
mode:
• The LCD is powered off.
• The storage drive is powered off.
• The microprocessor stops.
To enter sleep mode, press Fn+4.
In certain circumstances, the computer goes into sleep mode automatically:
• After a period of inactivity specified in power plan settings
• When the battery power is low
To resume the computer from sleep mode, press the power button.
Also, in either of the following events, the computer automatically returns from sleep mode and resumes
operation:
• The ring indicator (RI) is signaled by a serial device or a PC Card device.
• The time set on the resume timer elapses.
Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few
seconds before taking any action to reenter operation mode.

Hibernation mode
In hibernation mode, the following occurs:
• The system status, RAM, VRAM, and setup data are stored on the hard disk.
• The system is powered off.
Note: If the computer enters the hibernation mode while it is docked to the docking station, do not undock it
before resuming normal operation. If you do undock it and then try to resume normal operation, you will get
an error message, and you will have to restart the system.
If you have defined one of the following actions as the event that causes the system to go into hibernation
mode, perform that action.
• Closing the lid.
• Pressing the power button.
Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power
plan settings.
When the power is turned on, the computer returns from hibernation mode and resumes operation. The
hibernation file in the boot record on the hard disk drive is read, and system status is restored from the hard
disk drive.

Symptom-to-FRU index
This section contains following information:
• “Numeric error codes” on page 36
• “Error messages” on page 37
• “Beep errors” on page 38
• “LCD-related symptoms” on page 39

Chapter 4. Related service information

•
•

“Intermittent problems” on page 39
“Undetermined problems” on page 40

The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most
likely cause is listed first, in boldface type.
Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or
action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the
computer. Do not replace a nondefective FRU.
This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced
next.
A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be
any number.
If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not
described there, go to “Intermittent problems” on page 39.
Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual
for that device.

Numeric error codes
Table 1. Numeric error codes
Symptom or error
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program.

FRU or action, in sequence
System board

1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board

0187
EAIA data access error—The access to EEPROM is failed.

System board

0188
Invalid RFID Serialization Information Area.

System board

0189
Invalid RFID configuration information area—The
EEPROM checksum is not correct.

System board

0190
Critical low-battery error

1. Charge the battery.
2. Battery

0191
System Security—Invalid Remote Change requested.

1. Run the ThinkPad Setup program, and then save
current setting by pressing F10.
2. System board

0199
System Security— Security password retry count
exceeded.

1. Run the ThinkPad Setup program, and then save
the current setting by pressing F10.
2. System board

0270
Real Time Clock Error— System Real Time Clock is not
functional.
0271
Check Date and Time settings— Neither the date nor the
time is set in the computer.

Hardware Maintenance Manual

Have the computer serviced.

Set the date and time, using ThinkPad Setup.

Table 1. Numeric error codes (continued)
Symptom or error
1802
Unauthorized network card is plugged in—Turn off and
remove the network card.
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.

FRU or action, in sequence
1. Remove wireless network card.
2. System board

Remove all but the reader that you set up for the
authentication.

2101
Detection error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive.
2. M.2 solid-state drive
3. System board

2111
Read error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive.
2. M.2 solid-state drive
3. System board

2200
Machine Type and Serial Number are invalid.

System board

2201
Machine UUID is invalid

System board

Error messages
Table 2. Error messages
Symptom or error
Fan error

FRU or action, in sequence
1. Fan
2. Thermal grease
3. System board

Thermal sensing error

System board

Bottom cover tamper detection error

System board

Error: The non-volatile system UEFI variable storage is
nearly full.

Note:
This error indicates that the operating system or
programs cannot create, modify, or delete data in the
non-volatile system UEFI variable storage due to
insufficient storage space after POST.
The non-volatile system UEFI variable storage is used by
the UEFI BIOS and by the operating system or programs.
This error occurs when the operating system or programs
store large amounts of data in the variable storage. All
data needed for POST, such as BIOS setup settings,
chipset, or platform configuration data, are stored in a
separate UEFI variable storage.
Press F1 after the error message is displayed to enter
ThinkPad Setup. A dialog asks the user for confirmation
to clean up the storage. If the user selects “Yes”, all data
that were created by the operating system or programs
will be deleted except global variables defined by the
Unified Extensible Firmware Interface Specification. If the
user selects “No”, all data will be kept, but the operating
system or programs will not be able to create, modify, or
delete data in the storage.

Chapter 4. Related service information

Beep errors
Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black
screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep
technology, do the following:
1. Go to https://support.lenovo.com/smartbeep or scan the following QR Code.

2. Download the proper diagnostic app and install it on your smartphone.
3. Run the diagnostic app and place the smartphone near the computer.
4. Press the Fn key on your computer to emit the beep again. The diagnostic app decodes the beep error
and shows possible solutions on the smartphone.
The following section describes some beep errors and the corresponding solutions.
Note: Do not attempt to service a product yourself unless instructed to do so by the Customer Support
Center or product documentation. Only use a Lenovo-authorized service provider to repair your product.
Error codes
0001: Reset error (platform reset not de-asserted)

Solutions
1. Remove all power resources: the ac power
adapter, and the coin-cell battery (service provider
only). Reset the computer by inserting a
straightened paper clip into the emergency-reset
hole. Wait for one minute. Then reconnect all
power resources.
2. Replace the system board (service provider only).

0002: Internal bus error
0281: General embedded controller error
0282: Memory module error

Replace the system board (service provider only).
Replace the system board (service provider only).
1. Reinstall or replace the memory module (service
provider only).
2. Replace the system board (service provider only).

0283: PCI resource error

1. Remove PCIe devices (the M.2 card, PCIe card,
and so on) (service provider only).
2. Replace the system board (service provider only).

0284: TCG-compliant functionality-related error (might be
the BIOS code validation failure)

Replace the system board (service provider only).

0285: TCG-compliant functionality-related error (might be
the TPM initialization failure)

Replace the system board (service provider only).

0286: Integrated graphics error

Hardware Maintenance Manual

Replace the system board (service provider only).

Error codes

Solutions

0287: Discrete graphics error

1. Reinstall or replace the discrete graphics card
(service provider only).
2. Replace the system board (service provider only).

0288: Computer display error

1. Reconnect the display cable on both the system
board side and the computer display side (service
provider only).
2. Replace the system board (service provider only).

LCD-related symptoms
Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has
two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more
visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
Notes:
• This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later.
• Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot
guarantee that any replacement LCD will have zero pixel defects.
• One pixel consists of R, G, B sub-pixels.
Table 3. LCD-related symptoms
Symptom or error

FRU or action, in sequence

No beep, power-on indicator on, and a blank LCD during
POST.

Replace the system board.

•
•
•
•

LCD backlight not working.
LCD too dark.
LCD brightness cannot be adjusted.
LCD contrast cannot be adjusted.

1. Reseat the LCD connectors.
2. Replace the LCD assembly.
3. Replace the system board.

•
•
•
•

LCD screen unreadable.
Characters missing pixels.
Screen abnormal.
Wrong color displayed.

1.
2.
3.
4.

Horizontal or vertical lines displayed on LCD.

See important note for “LCD-related symptoms.”
Reseat the LCD connectors.
Replace the LCD assembly.
Replace the system board.
Replace the LCD assembly.

Intermittent problems
Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware
defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be
considered only when a problem recurs.
When analyzing an intermittent problem, do the following:
1. Run the diagnostic test for the system board in loop mode at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more
errors exist.

Chapter 4. Related service information

Undetermined problems
If the diagnostic tests did not identify the adapter or device that has failed, if wrong devices are installed, or if
the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs
that have no defects).
Verify that all attached devices are supported by the computer.
Verify that the power supply being used at the time of the failure is operating correctly. See “Power system
checkout” on page 28.
1. Turn off the computer.
2. Visually check each FRU for damage. Replace any damaged FRU.
3. Remove or disconnect all of the following devices:
a. Non-ThinkPad devices
b. Printer, mouse, and other external devices
c. External diskette drive or optical drive
d. Wireless cards
4. Turn on the computer.
5. Determine whether the problem has been solved.
6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):
a. System board
b. LCD assembly

Hardware Maintenance Manual

Chapter 5. Special keys
Your computer has several special keys to help you work more easily and effectively.

Windows logo key

Press the Windows logo key to open the Start menu. For information about using the Windows logo key with
other keys, see the help information system of the Windows operating system.
2 3

Fn key and function keys

You can configure the Fn key and function keys in the Keyboard Properties window by doing the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Lenovo - Keyboard Manager and the Keyboard Manager window is displayed.
3. Select the options of your preference.

•

+
Switch the key function between the standard F1–F12 function and the special function
printed as an icon on each key. When the Fn Lock indicator is off, you can use the default function. You
can change the default function in the Keyboard Properties window.

•

Mute or unmute the speakers. When the speakers are muted, the indicator on the key is on.
If you mute the sound and turn off your computer, the sound will remain muted when you turn on your
computer. To turn on the sound, press

•

Decrease the speaker volume.

•

Increase the speaker volume.

•

Mute or unmute the microphones. When the microphones are muted, the indicator on the key is on.

•

Darken the computer display.

•

Brighten the computer display.

•

Manage external displays.

•

Enable or disable the built-in wireless features.

•

Open the Settings window.

•

Enable or disable the built-in Bluetooth features.

•

Open a keyboard setting page.

•

Invoke the function defined by yourself. To define or change the action for the F12 key, do the
following:

Key combinations
• Fn+B: This key combination has the same function as the Break key on a conventional external keyboard.
• Fn+K: This key combination has the same function as the ScrLK or Scroll Lock key on a conventional
external keyboard.
• Fn+P: This key combination has the same function as the Pause key on a conventional external keyboard.
• Fn+S: This key combination has the same function as the SysRq key on a conventional external keyboard.
• Fn+4: Press Fn+4 to put the computer into sleep mode. To wake up the computer, press any key or the
power button.
• Fn+PrtSc: Open the Snipping Tool program.
• Fn+Spacebar: Press Fn+Spacebar to switch between the different keyboard backlight status (off, low, or
high).
• Fn+Left arrow key: This key combination has the same function as the Home key.
• Fn+Right arrow key: This key combination has the same function as the End key.

Hardware Maintenance Manual

Chapter 6. Locations
This chapter introduces the locations of the hardware components on your computer.

Computer controls, connectors, and indicators
This section introduces hardware features of the computer.

Front view

1 Microphones

2 Infrared camera (available on some models)

3 Conventional camera (available on some models)

4 Conventional camera with camera shutter (available on
some models)

5 Power button

6 Fingerprint reader

7 TrackPoint® buttons

8 Trackpad

9 NFC mark (available on some models)

10 TrackPoint pointing stick

Left-side view

1 USB-C™ connector (Thunderbolt™ 3 compatible) /
power connector

2 Ethernet extension connector Gen 2

3 Docking-station connector

4 USB 3.1 connector Gen 1

5 HDMI™ connector

Right-side view

1 Audio connector

2 Fan louvers

3 Always On USB 3.1 connector Gen 1

4 Mini security-lock slot

Rear view

1 Nano-SIM-card slot

Hardware Maintenance Manual

2 microSD card slot (a dummy microSD card is installed)

Bottom view

1 Docking-station positioning holes

2 Emergency-reset hole

3 Speakers

4 Fan louvers

Status indicators
This topic provides information about locating and identifying the various status indicators on your computer.
Note: Depending on the model, your computer might look different from the following illustrations.

Chapter 6. Locations

Caps Lock indicator

When this indicator is on, you can type uppercase letters by directly pressing the letter keys.
2

Fn Lock indicator

This indicator shows the status of Fn Lock function. For more information, see Chapter 5 “Special keys” on
page 41.
3

Speaker-mute indicator

When this indicator is on, the speakers are muted.
4

Microphone-mute indicator

When this indicator is on, the microphones are muted.
5

Camera status indicator

When this indicator is on, the camera is in use.
6 8

System status indicators

The indicator in the ThinkPad logo on the computer lid and the indicator in the power button show the
system status of your computer.
• Blinks for three times: The computer is initially connected to power.
• On: The computer is on (in normal mode).
• Off: The computer is off or in hibernation mode.
• Blinks quickly: The computer is entering sleep or hibernation mode.
• Blinks slowly: The computer is in sleep mode.
7

Fingerprint reader indicator

• Off: The fingerprint reader is not ready for tapping.
• Solid white: The fingerprint reader is ready for tapping
• Amber, blinking: The fingerprint cannot be authenticated.
9

ac power status indicator

This indicator shows the ac power and battery power status of the computer.
• White: connected to ac power (battery power 90%–100%)

Hardware Maintenance Manual

• Yellow: connected to ac power (battery power 0%–90%)
• Off: not connected to ac power

Locating FRUs and CRUs
This topic introduces the following service parts:
• “Major FRUs” on page 48
• “LCD FRUs” on page 50
• “Miscellaneous parts and other FRUs” on page 52
Notes:
• Each FRU is available for all types or models, unless otherwise specified.
• CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called
a “Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others
are designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For
optional-service CRUs, you can either install the CRU yourself or you can request that a Service Provider
install the CRU according to the warranty service for your product. If you intend on installing the CRU,
Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your
product and are available from Lenovo at any time upon request. You can find a list of CRUs for your
product in this Hardware Maintenance Manual. An electronic version of this manual can be found at
https://support.lenovo.com. Click Guides & Manuals and then follow the on-screen instructions to find the
manual for your product. You might be required to return the defective part that is replaced by the CRU.
When return is required: (1) return instructions, a prepaid shipping label, and a container will be included
with the replacement CRU; and (2) you might be charged for the replacement CRU if Lenovo does not
receive the defective CRU within thirty (30) days of your receipt of the replacement CRU. See your Lenovo
Limited Warranty documentation for full details.
ThinkPad computers contain the following types of CRUs and FRU:
– Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or
by trained service technicians at an additional cost.
– Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater
skill level. Trained service technicians can also provide service to install or replace the parts under the
type of warranty designated for the customer’s machine.
– FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers
choose to replace the FRUs by themselves, the product warranty might be affected.
• A Self-service CRU is identified by a single asterisk (*) in the CRU ID column. An Optional-service CRU is
identified by two asterisks (**). An N in the CRU ID column means that the part is not a CRU.
• FRUs marked with OP are available as options.

Chapter 6. Locations

Major FRUs

d
a
c

Hardware Maintenance Manual

Table 4. Major FRUs and CRUs
No.

FRU description

CRU ID

LCD unit

Nano-SIM-card tray

Trackpad assembly

Keyboard bezel assembly with fingerprint reader

Power button card assembly

Wireless-LAN antenna kit

Near field communication (NFC) card with NFC sponge (available on some models)

Trackpad cable

USB card with cable

Audio card with audio-card cable

Speaker assembly

Wireless-WAN antenna kit or wireless-WAN antenna filler (depending on the model)

Thermal fan assembly

Base cover assembly

Built-in battery

SD support bracket

Coin-cell battery

M.2 solid-state drive

Wireless-WAN card (available on some models)

Wireless-LAN card

System board assembly

Dummy microSD card

Lenovo factory recovery USB key

Power cord

ac power adapter

Miscellaneous parts kits

Note: The Lenovo factory recovery USB key a is used to restore the Microsoft Windows operating system.
They might not come with the computer, and a user might order them from https://pcsupport.lenovo.com/
lenovorecovery, though additional shipping and handling fees might apply.

Chapter 6. Locations

LCD FRUs

Table 5. LCD FRUs
No.

FRU descriptions

CRU ID

LCD bezel assembly

Protection plate assembly

Metal protection plate

LCD panel assembly

Infrared camera card (available on some models)

Camera shutter (for models with only conventional camera)

Conventional camera card (available on some models)

LCD bezel bottom cover

LCD rear cover assembly

Hardware Maintenance Manual

Table 5. LCD FRUs (continued)
No.

FRU descriptions

CRU ID

LED and camera cable assembly

Hinges

LCD cable

Chapter 6. Locations

Miscellaneous parts and other FRUs
FRU descriptions

CRU ID

Screw and tape kit
• Tape, 10 x 20 (5)
• Screw, M2.0 x L2.7 (2)
• Screw, M2F x L1.8 (8)
• Screw, M1.2 x L1.4 (80)
• Screw for hinge, M2.5 x L2.2 (8)
• Screw, M2.5 x L4.0, flat head (12)
• Screw, M2.0 x L2.2, big head (16)
• Screw, M2.0 x L5.0, flat head, black (12)
• Screw, M2.0 x L3.0 (24)
• Step screw, M2.0 x L2.3 (4)

Mechanical miscellaneous kit
• M.2 solid-state drive thermal rubber (1)
• Microphone rubber on camera card (1)
• NFC bracket (1)

Label kit

Trackpad insulation tape

Coin-cell battery adhesive rubber

M.2 solid-state drive thermal rubber

Connector and cable guide
This section provides information to help Lenovo authorized service technicians identify connectors and
cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see “Major
FRUs” on page 48 and “LCD FRUs” on page 50.
Note: Depending on the model, some connectors or cables might not be available.
System board connectors and cables
1 2 3

8
9

11
10

Hardware Maintenance Manual

16
17
18
19
20

No.

Connector/feature

Internal cable required

Cable connection

USB cable connector (internal)

USB cable

The USB card comes with a cable.
Connect the cable to this
connector.

Power button connector (internal)

Power-button-card cable

Connect one end to the power
button card and the other end to
this connector.

Camera/LED connector (internal)

Camera/LED cable

See “Camera/microphone card
connector and cable” on page 54

Thermal fan connector (internal)

Thermal fan assembly cable

The thermal fan assembly comes
with a cable. Connect the cable to
this connector.

M.2 solid-state drive slot (internal)

Insert an M.2 solid-state drive
directly into this slot.

microSD card slot (external)

Insert a microSD card into this
slot.

LCD cable connector (internal)

LCD cable

Connect one end to the LCD panel
and the other end to this
connector.

Wireless-LAN card slot (internal)

Insert the wireless-LAN card into
this slot.

Wireless-WAN card slot (internal)

Insert the wireless-WAN card into
this slot.

Coin-cell battery connector
(internal)

Coin-cell battery cable

The coin-cell battery comes with a
cable. Connect the cable to this
connector.

Keyboard connector (internal)

Keyboard cable

The keyboard bezel assembly
comes with a keyboard cable.
Connect the cable to this
connector.

TrackPoint pointing stick
connector (internal)

TrackPoint pointing stick cable

The keyboard bezel assembly
comes with a TrackPoint pointing
stick cable. Connect the cable to
this connector.

Built-in battery connector (internal)

Connect the built-in battery
directly to this connector.

Trackpad connector (internal)

Trackpad cable

See “Trackpad connector and
trackpad cable” on page 55

Chapter 6. Locations

No.

Connector/feature

Internal cable required

Cable connection

Audio card connector (internal)

Audio card cable

The audio card comes with a
cable. Connect the audio card
cable to this connector.

HDMI connector (external)

Connect a compatible digital
audio device or video monitor to
this connector.

USB 3.1 connector Gen 1
(external)

Connect USB-compatible devices
to this connector.

Ethernet extension connector Gen
2 (external)

Connect ThinkPad Ethernet
Extension Adapter Gen 2 to attach
an Ethernet cable.

19
20

USB-C™ connectors
(Thunderbolt™ 3 compatible)
(external)

Connect USB-C compatible
devices or a USB-C power
adapter to these connectors.

Nano-SIM-card slot (external)

If your computer supports the
wireless WAN feature, insert a
nano SIM card into this slot to
establish wireless WAN
connections.

Audio card connectors and cables
1
2
3

No.

Connector/feature

Internal cable required

Cable connection

Speaker assembly connector
(internal)

Speaker assembly cable

The speaker assembly comes with
a cable. Connect the cable to this
connector.

Proximity sensor connector
(internal)

Wireless-WAN antenna kit

Connect the orange cable of the
antenna kit to the main connector
and the blue cable of the antenna
kit to the auxiliary connector on
the wireless-WAN card. Then,
connect the black cable of the
antenna kit to this connector.

Audio connector (external)

Connect headphones or a headset
with a 3.5-mm (0.14-inch), 4-pole
plug to this connector.

Camera/microphone card connector and cable
1

Hardware Maintenance Manual

a
b

No.

Connector (location)

Internal cable required

Cable connection

Camera/microphone card
connector (internal)

Camera/LED cable

Connect the end c of the cable to
the camera/LED connector on the
system board, and connect the
end b of the cable to the LCD rear
cover. Then, connect the end a of
the cable to this connector.

Trackpad connector and trackpad cable
1

No.

Connector (location)

Internal cable required

Cable connection

Trackpad connector (internal)

Trackpad cable

Connect the end a of the cable to
the trackpad connector on the
system board, and the end b to
the NFC card connector on the
NFC card. Then connect the end
d to the fingerprint reader card
connector on the fingerprint reader
card, and the end c to this
connector.

NFC antenna connector (internal)

NFC antenna kit

The trackpad comes with an NFC
antenna kit. Connect the antenna
to this connector.

Chapter 6. Locations

Looking up FRU information
For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to
https://support.lenovo.com/partslookup.

Hardware Maintenance Manual

Chapter 7. FRU replacement notices
This chapter presents notices related to removing and replacing parts. Read this chapter carefully before
replacing any FRU.
CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optionalservice CRUs, you can either install the CRU yourself or you can request that a Service Provider install the
CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship
the CRU to you. CRU information and replacement instructions are shipped with your product and are
available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware
Maintenance Manual. An electronic version of this manual can be found at https://support.lenovo.com. Click
Guides & Manuals and then follow the on-screen instructions to find the manual for your product. You might
be required to return the defective part that is replaced by the CRU. When return is required: (1) return
instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you
might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty (30)
days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full
details.

Common service tools
Below is the list of common service tools that you might need while servicing the computer.
• Screwdriver kit
• 1/4" drive spinner handle
• 1/4" Sq. to 1/4" hex torx adapter
• TR7-TR-10 tamper resistant torx bits
• Removal tool antenna RF connector
• USB 2.0 CD-RW/DVD-ROM combo drive II
• USB cable
• USB Maintenance Key
• USB floppy diskette drive for maintenance diskette
• USB floppy diskette drive tool kit
• Test card for integrated Smart Card
• LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later
Note: Download the file from the following Web site:
https://support.lenovo.com

Screw notices
Loose screws can cause a reliability problem. In the ThinkPad notebook computer, this problem is
addressed with special nylon-coated screws that have the following characteristics:
• They maintain tight connections.
• They do not easily come loose, even with shock or vibration.
• They are harder to tighten.
Do the following when you service this machine:
• Keep the screw kit in your tool bag. For the part number of the screw kit, go to https://support.lenovo.com/
partslookup.
• It is recommended to use new screws.

• It is recommended to use each screw only once.
Tighten screws as follows:
• Plastic to plastic
Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

• Logic card to plastic
Turn an additional 180 degrees after the screw head touches the surface of the logic card.

Notes:
• Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you
have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table
for each step.
• Ensure that torque screwdrivers are calibrated correctly following country specifications.

Retaining serial numbers
This section includes the following descriptions:
• “Restoring the serial number of the system unit” on page 58
• “Retaining the UUID” on page 59
• “Reading or writing the ECA information” on page 60

Restoring the serial number of the system unit
When the computer was manufactured, the EEPROM on the system board was loaded with the serial
numbers of the system and all major components. These numbers need to remain the same throughout the
life of the computer.
If you replace the system board, you must restore the serial number of the system unit to its original value.
The serial number of the system unit is written on the label attached to the bottom of the computer.
If you cannot find the serial number of the system unit on the bottom of the computer, try the following
method to get the number:
Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the
ThinkPad Setup program is set to UEFI Only.
1. Connect a USB memory key to the computer.

Hardware Maintenance Manual

2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a
Maintenance Key.
Note: Only an authorized Lenovo service technician can access the above Web site.
3. Restart the computer.
4. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is
displayed.
5. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for
Asset ID screen is displayed.
6. Type 2 under Enter the action desired, then press Enter. The serial number of each device in your
computer is displayed; the serial number of the system unit is listed as follows:
20- Serial number
7. Record the serial number of the system unit.
After you replace the system board, do the following to restore the serial number of the system unit:
1. Connect the Maintenance Key to the computer.
2. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is
displayed.
3. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for
Asset ID screen is displayed.
4. Type 1 under Enter the action desired, then press Enter. Then follow the instructions on the screen to
restore the serial number of the system unit.

Retaining the UUID
The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at
production and stored in the EEPROM of your system board.
The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400. No two
computers in the world have the same number.
When you replace the system board, perform the following steps to create a new UUID for the system board
if the system board does not have a UUID:
Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the
ThinkPad Setup program is set to UEFI Only.
1. Connect a USB memory key to the computer.
2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a
Maintenance Key.
Note: Only an authorized Lenovo service technician can access the above Web site.
3. Restart the computer.
4. When the logo screen is displayed, press Esc. The ThinkPad Config Information Update Utility interface
is displayed.
5. Type 2 under Enter the action desired, then press Enter. The Auto UUID generation utility interface is
displayed.
6. Type y under Change UUID. OK? [Y/N], then press Enter. A new UUID is created and written. If a valid
UUID already exists, it is not overwritten.

Chapter 7. FRU replacement notices

Reading or writing the ECA information
Information about Engineering Change Announcements (ECA) is stored in the EEPROM of the system board.
The electronic storage of this information simplifies the procedure to check if the ECA has been previously
applied to a machine. The machine does not need to be disassembled to check for the ECA application.
To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write
function on the USB Maintenance Key.
1. Insert the Maintenance Key and restart the computer.
2. From the main menu, select 6. Set ECA Information.
3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the
instructions on the screen.
4. To read the box build date, select 5. Read box build date from EEPROM, and follow the instruction on
the screen.
After an ECA has been applied to the machine, the EEPROM must be updated to reflect the ECA's
application. Use the Maintenance Key to update the EEPROM.
Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the
same as the machine type of the machine that had the ECA applied to it.
1. Insert the Maintenance Key and restart the computer.
2. From the main menu, select 6. Set ECA Information.
3. To write the ECA information, select 1. Write ECA/rework number from EEPROM, and follow the
instructions on the screen.
4. To write the box build date, select 4. Write box build date from EEPROM, and follow the instruction on
the screen.
If the system board is being replaced, try to read the ECA information from the old system board and transfer
the information to the new system. If the system board is inoperable, this will not be possible.

Hardware Maintenance Manual

Chapter 8. Removing or replacing a FRU
This chapter provides instructions on how to remove or replace a FRU.
CRU statement for customers:
You can resolve some problems with your product with a replacement part you can install yourself, called a
“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are
designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optionalservice CRUs, you can either install the CRU yourself or you can request that a Service Provider install the
CRU according to the warranty service for your product. If you intend on installing the CRU, Lenovo will ship
the CRU to you. CRU information and replacement instructions are shipped with your product and are
available from Lenovo at any time upon request. You can find a list of CRUs for your product in this Hardware
Maintenance Manual. An electronic version of this manual is available for downloading at https://
support.lenovo.com. You might be required to return the defective CRU. When return is required: (1) return
instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you
might be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30)
days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full
details.

General guidelines
When removing or replacing a FRU, be sure to observe the following general guidelines:
1. Do not try to service any computer unless you have been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review Chapter 7 “FRU replacement notices” on page 57.
3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs
are listed at the beginning of each FRU replacement section. Remove them in the order in which they are
listed.
4. Follow the correct sequence in the steps for removing a FRU, as given in the drawings by the numbers in
square callouts.
5. When turning a screw, turn it in the direction as given by the arrow in the drawing.
6. When removing a FRU, move it in the direction as given by the arrow in the drawing.
7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to
replacement.
8. When replacing a FRU, use the correct screws as shown in the replacement procedures.

DANGER
Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets,
disconnect any interconnecting cables, and then disable the built-in battery.
Attention: After replacing a FRU, do not turn on the computer until you have made sure that all screws,
springs, and other small parts are in place and none are loose inside the computer. Verify this by shaking the
computer gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short
circuits.
Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD). Before
touching it, establish personal grounding by touching a ground point with one hand or by using an ESD strap.

Before servicing the computer
Carefully read this topic before servicing the computer.

Removing external devices
Before you start servicing, ensure that you remove all external devices installed by the customer, such as
microSD card, dock, and external display.

Disabling the built-in battery
Before replacing any CRU or FRU, ensure that you disable Fast Startup first and then disable the built-in
battery.
To disable Fast Startup, do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Power Options, and then click Choose what the power buttons do on the left pane.
3. Click Change settings that are currently unavailable at the top.
4. If prompted by User Account Control (UAC), click Yes.
5. Clear the Turn on fast startup check box, and then click Save changes.
To disable the built-in battery, do the following:
1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad
Setup.
2. Select Config ➙ Power. The Power submenu is displayed.
3. Select Disable built-in battery and press Enter.
4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off
automatically. Wait three to five minutes to let the computer cool.

Removing the nano-SIM-card tray
If the computer has a nano SIM card installed, remove the nano SIM card before you start the servicing.

After you finish the servicing, ensure that you install the nano SIM card (if available) back into the computer.

Removing the dummy microSD card
A dummy microSD card is installed in the computer. Remove the dummy microSD card before you start the
servicing.

Hardware Maintenance Manual

After you finish the servicing, ensure that you install the dummy microSD card back into the computer.

Removing a major FRU
This section provides instructions on how to remove a major FRU.

1010 Base cover assembly
Removal steps of the base cover assembly

Chapter 8. Removing or replacing a FRU

Applying labels to the base cover:
The following illustration shows the label locations.

1 GEO label

2 Genuine Microsoft label (for Windows 10)

3 IMEI label

4 S/N label

5 Asset Tag

6 Country label

1020 M.2 solid-state drive
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Attention:
• Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper
handling can cause damage and permanent loss of data.
• Before removing the drive, have the user make a backup copy of all the information on it if possible.
• Never remove the drive while the system is operating or in suspend mode.

Hardware Maintenance Manual

Removal steps of the M.2 solid-state drive

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

1030 Wireless-LAN card
Note: This information is only for the user-replaceable modules.
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Removal steps of the wireless-LAN card

Chapter 8. Removing or replacing a FRU

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

When installing: Plug the gray cable into the main connector and the black cable into the auxiliary
connector.

1040 Wireless-LAN antenna kit
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Removal steps of the wireless-LAN antenna kit

Step

Screw (quantity)

Color

Torque

M2 × L3 mm, flat-head shoulder, nylon-coated (2)

Silver

0.181 Nm
(1.85 kgf-cm)

When installing:

Hardware Maintenance Manual

Plug the gray cable into the main connector on the card; and plug the black cable into the auxiliary connector
on the card.

1050 Wireless-WAN card
Note: This information is only for the user-replaceable modules.
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Removal steps of the wireless-WAN card

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

When installing: Plug the orange cable into the main connector and the blue cable into the auxiliary
connector.

1060 Thermal fan assembly
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Removal steps of the thermal fan assembly
Note: Loosen the screws 2 in ascending alphabetical order as illustrated.

Chapter 8. Removing or replacing a FRU

When installing:
• Do not touch the top and bottom areas marked a in the following illustration.

• Tighten the screws in ascending order by following the number marked beside each screw. Otherwise, the
system board might get damaged.

1070 USB card with cable
For access, remove this FRU:
• “1010 Base cover assembly” on page 63

Hardware Maintenance Manual

•

“1060 Thermal fan assembly” on page 67

Removal steps of the USB card with cable

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head shoulder, nylon-coated (2)

Black

0.181 Nm
(1.85 kgf-cm)

1080 SD support bracket
For access, remove this FRU:
• “1010 Base cover assembly” on page 63

Chapter 8. Removing or replacing a FRU

Removal steps of the SD support bracket

Step

Screw (quantity)

Color

Torque

M2 × L5 mm, flat-head shoulder, nylon-coated (2)

Black

0.181 Nm
(1.85 kgf-cm)

1090 Built-in battery
Important notices for replacing a battery
Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and
provides no warranties for failures or damage arising out of their use.
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
Removal steps of the built-in battery
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.

Hardware Maintenance Manual

Step

Screw (quantity)

Color

Torque

M2 × L5 mm, flat-head, nylon-coated (4)

Black

0.181 Nm
(1.85 kgf-cm)

Chapter 8. Removing or replacing a FRU

Installing the built-in battery

1100 NFC card
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70

Hardware Maintenance Manual

Removal steps of the NFC card

1110 Trackpad cable
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70
Removal steps of the trackpad cable

Chapter 8. Removing or replacing a FRU

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

1120 Trackpad assembly
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70

Hardware Maintenance Manual

Removal steps of the trackpad assembly

Note: Loosen the screws 7 in ascending alphabetical order as illustrated.

7a
7d

Step

Screw (quantity)

Color

Torque

M2 × L1.8 mm, flat-head, nylon-coated (4)

Silver

0.181 Nm
(1.85 kgf-cm)

Chapter 8. Removing or replacing a FRU

1130 Audio card with audio-card cable
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70
Removal steps of the audio card with audio-card cable

Hardware Maintenance Manual

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (3)

Black

0.181 Nm
(1.85 kgf-cm)

1140 Speaker assembly
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70
Removal steps of the speaker assembly

Chapter 8. Removing or replacing a FRU

Step

Screw (quantity)

Color

Torque

M2 × L5 mm, flat-head shoulder, nylon-coated (4)

Black

0.181 Nm
(1.85 kgf-cm)

1150 Coin-cell battery
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70
Removal steps of the coin-cell battery

1160 Wireless-WAN antenna kit or wireless-WAN antenna filler
For access, remove this FRU:
• “1010 Base cover assembly” on page 63
• “1090 Built-in battery” on page 70
• “1150 Coin-cell battery” on page 78

Hardware Maintenance Manual

Removal steps of the wireless-WAN antenna kit

Step

Screw (quantity)

Color

Torque

M2 × L3 mm, flat-head shoulder, nylon-coated (4)

Silver

0.181 Nm
(1.85 kgf-cm)

When installing:
Plug the orange cable into the main connector on the card; and plug the blue cable into the auxiliary
connector on the card.

Chapter 8. Removing or replacing a FRU

Removal steps of the wireless-WAN antenna filler

Step

Screw (quantity)

Color

Torque

M2 × L3 mm, flat-head shoulder, nylon-coated (4)

Silver

0.181 Nm
(1.85 kgf-cm)

1170 System board assembly
Important notices for handling the system board
When handling the system board, read the following:
• The system board has an accelerometer, which can be broken when several thousands of G-forces are
applied.
Note: Dropping a system board from a height of as little as six inches so that it falls flat on a hard bench
can subject the accelerometer to as much as 6000 G's of shock.
• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or
composite.
• Avoid rough handling of any kind.
• At every point in the process, be sure not to drop or stack the system board.
• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a
corrugated conductive material.
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1020 M.2 solid-state drive” on page 64
• “1030 Wireless-LAN card” on page 65
• “1050 Wireless-WAN card” on page 67
• “1060 Thermal fan assembly” on page 67
• “1090 Built-in battery” on page 70
• “1080 SD support bracket” on page 69
• “1040 Wireless-LAN antenna kit” on page 66
Attention: The microprocessor soldered on the system board is extremely sensitive. When you service the
system board, avoid any kind of rough handling.

Hardware Maintenance Manual

Removal steps of the system board assembly

Step

Screw (quantity)

Color

Torque

M2 × L3 mm, flat-head, nylon-coated (5)

Silver

0.181 Nm
(1.85 kgf-cm)

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

Chapter 8. Removing or replacing a FRU

1180 Power button card assembly
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1020 M.2 solid-state drive” on page 64
• “1030 Wireless-LAN card” on page 65
• “1050 Wireless-WAN card” on page 67
• “1060 Thermal fan assembly” on page 67
• “1090 Built-in battery” on page 70
• “1080 SD support bracket” on page 69
• “1040 Wireless-LAN antenna kit” on page 66
• “1170 System board assembly” on page 80
Removal steps of the power button card assembly

Hardware Maintenance Manual

Step

Screw (quantity)

Color

Torque

M2 × L2.2 mm, flat-head, nylon-coated (1)

Black

0.181 Nm
(1.85 kgf-cm)

1190 LCD unit
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
Removal steps of the LCD unit

Step

Screw (quantity)

Color

Torque

M2.5 × L4 mm, flat-head, nylon-coated (6)

Black

0.294 Nm
(3.0 kgf-cm)

Chapter 8. Removing or replacing a FRU

Removing an LCD FRU
This section provides instructions on how to remove an LCD FRU.

2010 LCD-bezel assembly, protection plate assembly, and metal
protection plate
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1190 LCD unit” on page 83

Hardware Maintenance Manual

Removal steps of the LCD-bezel assembly, protection plate assembly, and metal protection plate

When installing: After the LCD-bezel assembly is removed, it cannot be used anymore. A new LCD-bezel
assembly is required for replacement.

2020 Hinges and LCD bottom bezel
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1190 LCD unit” on page 83
• “2010 LCD-bezel assembly, protection plate assembly, and metal protection plate” on page 84

Chapter 8. Removing or replacing a FRU

Removal steps of the hinges and LCD bottom bezel

Step

Screw (quantity)

Color

Torque

M2.5 × L2.2 mm, big-head, nylon-coated (4)

Black

0.294 Nm
(3.0 kgf-cm)

2030 LCD panel assembly and LCD cable
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1190 LCD unit” on page 83
• “2010 LCD-bezel assembly, protection plate assembly, and metal protection plate” on page 84
• “2020 Hinges and LCD bottom bezel” on page 85

Hardware Maintenance Manual

Removal steps of the LCD panel assembly and LCD cable

2040 Camera shutter, camera card, and camera/LED cable (for models
without infrared camera)
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1190 LCD unit” on page 83
• “2010 LCD-bezel assembly, protection plate assembly, and metal protection plate” on page 84
• “2020 Hinges and LCD bottom bezel” on page 85
• “2030 LCD panel assembly and LCD cable” on page 86
Removal steps of the camera shutter

Chapter 8. Removing or replacing a FRU

Removal steps of the camera card

Removal steps of the camera/LED cable

2050 Camera card, and camera cable (for models with infrared camera)
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 63
• “1190 LCD unit” on page 83
• “2010 LCD-bezel assembly, protection plate assembly, and metal protection plate” on page 84
• “2020 Hinges and LCD bottom bezel” on page 85
• “2030 LCD panel assembly and LCD cable” on page 86

Hardware Maintenance Manual

Removal steps of the camera card

Removal steps of the camera/LED cable

Chapter 8. Removing or replacing a FRU

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 about 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.

Electronic emissions notices
For electronic emission information on Class B digital devices, refer to the corresponding information in the
User Guide.

Trademarks
The following terms are trademarks of Lenovo in the United States, other countries or both:
Lenovo
Lenovo logo
ThinkPad
ThinkPad logo
TrackPoint
Microsoft, Windows, and Cortana are trademarks of the Microsoft group of companies.
Thunderbolt is a trademark of Intel Corporation or its subsidiaries in the U.S. and/or other countries.
DisplayPort is a trademark of the Video Electronics Standards Association.
The terms HDMI and HDMI High-Definition Multimedia Interface are trademarks or registered trademarks of
HDMI Licensing LLC in the United States and other countries.
WiGig is a registered trademark of Wi-Fi Alliance.
Other company, product, or service names may be the trademarks or service marks of others.

Hardware Maintenance Manual

Part Number: SP40P03575

Printed in

(1P) P/N: SP40P03575

*1PSP40P03575*

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.7
Linearized                      : No
Page Count                      : 100
Page Layout                     : SinglePage
Language                        : en-gb
Tagged PDF                      : Yes
Instance ID                     : uuid:7924A332-A1E0-ADA3-2061-8C8E8EB4C44A
Document ID                     : uuid:D4E7DE12-5D33-1FC3-4586-48D047B60179
Create Date                     : 2018:01:02 09:00:19+08:00
Modify Date                     : 2018:01:02 09:00:19+08:00
Creator Tool                    : PTC Arbortext Publishing Engine
Metadata Date                   : 2018:01:02 09:00:19+08:00
Producer                        : PDFlib+PDI 9.0.7p3 (C++/Win64)
Config File                     : D:\ptc\arbortext pe\custom\app\standard.appcf
Stylesheet                      : D:\ptc\arbortext pe\custom\doctypes\ditabase\8.5x11_book_hel.style
PTC Arbortext Build             : R70M060-65
EP Sprocessor                   : PStill version 1.84.42
Print Engine                    : PTC Arbortext Advanced Print Publisher 11.1.4334/W Library-x64
Title                           : Hardware Maintenance Manual
Creator                         : PTC Arbortext Publishing Engine

EXIF Metadata provided by EXIF.tools

Lenovo Hardware Maintenance Manual (English) (HMM) Think Pad X1 Carbon Gen 6th (Type 20KH, 20KG) Laptop (Think Pad) Type 20KG 6thgen Hmm En

Navigation menu

Versions of this User Manual:

Views

Navigation