Table of Contents
- About this manual
- Chapter 1. Safety information
- Chapter 2. Important service information
- Chapter 3. General checkout
- Chapter 4. Related service information
- Chapter 5. YOGA Modes (for X1 Yoga)
- Chapter 6. Special keys
- Chapter 7. Locations
- Chapter 8. FRU replacement notices
- Chapter 9. Removing or replacing a FRU
- General guidelines
- Before servicing the computer
- Removing a major FRU
- 1010 Base cover assembly
- 1020 M.2 SSD and thermal pad
- 1030 WWAN card
- 1040 Pen charger (for X1 Yoga Gen 5)
- 1050 Thermal fan assembly
- 1060 Built-in battery
- 1070 USB and power board
- 1080 Trackpad and fingerprint reader cable
- 1090 Fingerprint reader module and bracket
- 1100 Trackpad and trackpad insulation tape
- 1110 NFC module and the sponge
- 1120 Coin-cell battery
- 1130 Wireless-WAN antenna assembly
- 1140 Speaker assembly near the built-in battery
- 1150 System board assembly
- 1160 Speaker assembly near the hinges
- 1170 Wireless-LAN antenna assembly (for X1 Carbon Gen 8)
- 1180 LCD unit
- 1190 Keyboard bezel assembly with keyboard
- Removing an LCD FRU (for X1 Carbon Gen 8)
- Appendix A. Notices
Lenovo X1 Carbon Gen 8 User Manual
Displayed below is the user manual for X1 Carbon Gen 8 by Lenovo which is a product in the Notebooks category. This manual has pages.
Related Manuals
X1 Yoga Gen 5 and X1 Carbon Gen 8
Hardware Maintenance Manual
Note: Before using this information and the product it supports, be sure to read the general information
under Appendix A “Notices” on page 101.
First Edition (April 2020)
© Copyright Lenovo 2020.
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. GS-
35F-05925.
Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. Important service
information . . . . . . . . . . . . . . . 21
Strategy for replacing FRUs . . . . . . . . . . 21
Strategy for replacing an M.2 solid-state
drive . . . . . . . . . . . . . . . . . 21
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 22
How to use error message . . . . . . . . . 22
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 23
Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . . . 25
Checkout guide . . . . . . . . . . . . . . . 26
Diagnosing problems . . . . . . . . . . . 26
Quick test programs . . . . . . . . . . . 27
UEFI diagnostic program . . . . . . . . . 27
Bootable diagnostic programs . . . . . . . 27
Power system checkout . . . . . . . . . . . 28
Checking the ac power adapter . . . . . . . 29
Checking the battery and operational
charging . . . . . . . . . . . . . . . . 29
Checking the coin-cell battery . . . . . . . 29
Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Recovery information . . . . . . . . . . . . 31
Resetting your computer . . . . . . . . . 31
Using advanced startup options . . . . . . 31
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 31
Creating and using a recovery USB drive . . . 32
Passwords. . . . . . . . . . . . . . . . . 33
Power-on password . . . . . . . . . . . 33
Hard disk password . . . . . . . . . . . 33
Supervisor password . . . . . . . . . . . 33
System management password. . . . . . . 34
How to remove the power-on password . . . 34
How to remove the hard disk password. . . . 35
How to remove the system management
password . . . . . . . . . . . . . . . 35
Power management . . . . . . . . . . . . . 36
Sleep mode . . . . . . . . . . . . . . 36
Hibernation mode . . . . . . . . . . . . 36
Symptom-to-FRU index . . . . . . . . . . . 37
Numeric error codes . . . . . . . . . . . 37
Error messages . . . . . . . . . . . . . 39
Beep symptoms . . . . . . . . . . . . . 39
No-beep symptoms . . . . . . . . . . . 41
LCD-related symptoms . . . . . . . . . . 41
Intermittent problems . . . . . . . . . . . 42
Undetermined problems . . . . . . . . . 42
Chapter 5. YOGA Modes (for X1
Yoga) . . . . . . . . . . . . . . . . . . 45
Chapter 6. Special keys . . . . . . . . 47
Chapter 7. Locations . . . . . . . . . 49
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 49
Front . . . . . . . . . . . . . . . . . 49
Base . . . . . . . . . . . . . . . . . 50
Left . . . . . . . . . . . . . . . . . . 51
Right . . . . . . . . . . . . . . . . . 52
Rear view . . . . . . . . . . . . . . . 53
Bottom view . . . . . . . . . . . . . . 54
Locating FRUs and CRUs . . . . . . . . . . . 54
Major FRUs and CRUs (for X1 Yoga Gen 5) . . 56
Major FRUs and CRUs (for X1 Carbon Gen
8) . . . . . . . . . . . . . . . . . . 58
LCD FRUs (for X1 Carbon Gen 8) . . . . . . 60
Miscellaneous parts and other FRUs . . . . . 61
Connector and cable guide . . . . . . . . 61
Looking up FRU information . . . . . . . . . . 64
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . . 65
Service tool kit . . . . . . . . . . . . . . . 65
Screw notices . . . . . . . . . . . . . . . 65
Sensor calibration (for X1 Yoga Gen 5 only) . . . . 66
Retaining serial numbers . . . . . . . . . . . 67
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 67
© Copyright Lenovo 2020 i
Retaining the UUID. . . . . . . . . . . . 68
Reading or writing the ECA information . . . . 68
Chapter 9. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 71
General guidelines. . . . . . . . . . . . . . 71
Before servicing the computer . . . . . . . . . 72
Removing external devices . . . . . . . . 72
Disabling the built-in battery . . . . . . . . 72
Removing the nano-SIM card . . . . . . . 72
Removing ThinkPad Pen Pro (for X1 Yoga Gen
5) . . . . . . . . . . . . . . . . . . 72
Removing a major FRU . . . . . . . . . . . . 73
1010 Base cover assembly . . . . . . . . 73
1020 M.2 SSD and thermal pad . . . . . . . 74
1030 WWAN card . . . . . . . . . . . . 75
1040 Pen charger (for X1 Yoga Gen 5) . . . . 76
1050 Thermal fan assembly . . . . . . . . 77
1060 Built-in battery . . . . . . . . . . . 77
1070 USB and power board . . . . . . . . 79
1080 Trackpad and fingerprint reader cable . . 80
1090 Fingerprint reader module and
bracket . . . . . . . . . . . . . . . . 81
1100 Trackpad and trackpad insulation
tape . . . . . . . . . . . . . . . . . 82
1110 NFC module and the sponge . . . . . 83
1120 Coin-cell battery . . . . . . . . . . 84
1130 Wireless-WAN antenna assembly . . . . 85
1140 Speaker assembly near the built-in
battery . . . . . . . . . . . . . . . . 86
1150 System board assembly . . . . . . . 88
1160 Speaker assembly near the hinges . . . 90
1170 Wireless-LAN antenna assembly (for X1
Carbon Gen 8) . . . . . . . . . . . . . 92
1180 LCD unit . . . . . . . . . . . . . 92
1190 Keyboard bezel assembly with
keyboard . . . . . . . . . . . . . . . 94
Removing an LCD FRU (for X1 Carbon Gen 8) . . . 95
2010 LCD Bezel sheet . . . . . . . . . . 95
2020 Hinges . . . . . . . . . . . . . . 95
2030 Bezel frame . . . . . . . . . . . . 96
2040 LCD panel and LCD cable . . . . . . . 97
2050 B2B stopper . . . . . . . . . . . . 98
2060 ThinkShutter . . . . . . . . . . . . 98
2070 Support plate. . . . . . . . . . . . 99
2080 Camera module. . . . . . . . . . . 99
2090 Rear cover assembly . . . . . . . . . 100
Appendix A. Notices. . . . . . . . . . 101
ii X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
About this manual
This manual contains service and reference information for the following ThinkPad® products.
ThinkPad X1 Yoga Gen 5 Machine types (MT): 20UB and 20UC
ThinkPad X1 Carbon Gen 8 Machine types (MT): 20U9 and 20UA
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.
• Depending on the model, some hardware configuration and software programs might not be available on
the computer. Some statements in this manual might not be applicable to the computer.
• 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.
© Copyright Lenovo 2020 iii
iv X1 Yoga Gen 5 and X1 Carbon Gen 8 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.
© Copyright Lenovo 2020 1
• 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.
2X1 Yoga Gen 5 and X1 Carbon Gen 8 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 non-
ThinkPad 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 3
– 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
DANGER
DANGER
4X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
6X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
8X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
DANGER
DANGER
DANGER
DANGER
VORSICHT
10 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
VORSICHT
VORSICHT
VORSICHT
12 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
14 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
16 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
18 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
20 X1 Yoga Gen 5 and X1 Carbon Gen 8 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 https://support.lenovo.com 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.
© Copyright Lenovo 2020 21
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
cause damage to 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.
• After you replace the system board, go to https://support.lenovo.com/us/en/solutions/HT506954 to input the
model type, serial number and Brand ID of your computer.
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).
22 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
24 X1 Yoga Gen 5 and X1 Carbon Gen 8 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.
© Copyright Lenovo 2020 25
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 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.
26 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Quick test programs
Run quick test programs to troubleshoot and resolve computer problems, especially when the computer
does not have Lenovo Vantage 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 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 37
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.
The following table displays the main items of the UEFI diagnostic program. Depending on the model, the
items might differ slightly.
Table 1. Items on the main screen of the UEFI diagnostic program
Tests Tools
• Memory quick test
• Memory extended test
• Memory bit fade test (180 min)
• Quick storage device test
• LCD test
• PCI-e test
• Motherboard buses test
• Exit application
• System information
• Generate configuration file
• Execute from configuration file
• Recover bad sectors tool
Note: The recover bad sectors tool is only available on computers that have hard disk drives installed.
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
Chapter 3.General checkout 27
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 37 for error code descriptions and troubleshooting hints.
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 37 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
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 29
• “Checking the battery and operational charging” on page 29
• “Checking the coin-cell battery” on page 29
28 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
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 or the port replicator is used, replace the
docking station or the port replicator.
• 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.
• If the computer does not charge during operation, go to “Checking the battery and operational charging”
on page 29.
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the USB-C type ac power adapter
To check the USB-C type ac power adapter, do the following:
1. Connect the computer to a power outlet and turn on the computer.
2. Start Lenovo Vantage program, and then click Hardware Settings ➙ Power. The ac power adapter
information is displayed.
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.
Checking the battery and operational charging
Checking the battery
This system 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.
Checking the operational charging
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. Perform operational charging. Click the battery status icon in the Windows notification area to display
detailed battery information. If it indicates that the battery is not charging, replace the battery.
3. Check the battery status 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 72.
2. Remove the coin-cell battery. See “1120 Coin-cell battery” on page 84.
3. Measure the voltage of the coin-cell battery. See the following illustration.
Chapter 3.General checkout 29
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.
30 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 4. Related service information
This chapter presents following information:
• “Recovery information” on page 31
• “Passwords” on page 33
• “Power management” on page 36
• “Symptom-to-FRU index” on page 37
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.
© Copyright Lenovo 2020 31
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
If you cannot start your computer, reset the computer by inserting a straightened paper clip into the
emergency-reset hole. If you still cannot start your computer, use the recovery USB drive to recover your
computer.
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.
32 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Passwords
As many as four passwords may be needed for any ThinkPad notebook computer: the power-on password,
the hard disk password, the supervisor password, and the system management 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.
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 34.
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 35.
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.
Chapter 4.Related service information 33
System management password
The system management password can also protect the system information stored in UEFI BIOS like a
supervisor password, but it has lower authority by default. The system management password can be set
through the UEFI BIOS menu or through Windows Management Instrumentation (WMI) with the Lenovo
client-management interface.
You can enable the system management password to have the same authority as the supervisor password
to control security related features. To customize the authority of the system management password through
the UEFI BIOS menu:
1. Enter the UEFI BIOS menu.
Note: When you are prompted by the icon , enter the correct supervisor password if a supervisor
password has been set, or enter the correct system management password if no supervisor password
has been set. Otherwise, you cannot change the configurations in the following steps.
2. Select Security ➙ Password ➙ System Management Password Access Control.
3. Follow the on-screen instructions.
If you have set both the supervisor password and the system management password, the supervisor
password overrides the system management password. If you have set both the system management
password and the power-on password, the system management password overrides the power-on
password.
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 72.
3. Remove the base cover assembly. See “1010 Base cover assembly” on page 73.
4. Remove the built-in battery. See “1060 Built-in battery” on page 77.
5. Remove the coin-cell battery. See “1120 Coin-cell battery” on page 84.
6. Reinstall the coin-cell battery.
7. Reinstall the internal battery pack.
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 or a system management 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 or the system management password to enter the ThinkPad Setup
program.
4. Select Security.
5. Select Password.
6. Select Power-On Password.
34 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
7. Type the current supervisor password or the system management 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.
How to remove the system management password
To remove a system management password, do the following:
If no supervisor password has been set, do the following to remove the system management password:
1. Turn off the computer and disconnect ac power.
2. Disable the built-in battery. See “Disabling the built-in battery” on page 72.
3. Remove the base cover assembly. See “1010 Base cover assembly” on page 73.
4. Remove the internal battery pack. See “1060 Built-in battery” on page 77.
5. Remove the coin-cell battery. See “1120 Coin-cell battery” on page 84.
6. Reinstall the coin-cell battery.
7. Reinstall the internal battery pack.
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 system management password has been removed.
Chapter 4.Related service information 35
If a supervisor password has been set and is known to the service technician, do the following to remove the
system management 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 System Management 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 system management password
has been removed.
Power management
Sleep mode
When the computer enters sleep mode, the screen goes blank and all internal devices are still powered on
with lower power consumption.
To enter sleep mode, press Fn+4 or open the Start menu and click Power, and then click Sleep.
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.
36 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
• 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 37
• “Error messages” on page 39
• “Beep symptoms” on page 39
• “No-beep symptoms” on page 41
• “LCD-related symptoms” on page 41
• “Intermittent problems” on page 42
• “Undetermined problems” on page 42
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 42.
Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual
for that device.
Numeric error codes
Table 2. Numeric error codes
Symptom or error FRU or action, in sequence
0177
Bad SVP data, stop POST task—The checksum of the
supervisor password in the EEPROM is not correct.
System board
0183
Bad CRC of Security Settings in EFI Variable. Enter the
ThinkPad Setup program.
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
Chapter 4.Related service information 37
Table 2. Numeric error codes (continued)
Symptom or error FRU or action, in sequence
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.
1. Run ThinkPad Setup to reset the time and date
2. Replace the coin-cell battery and run ThinkPad Setup
to reset the time and date.
0271
Check Date and Time settings— Neither the date nor the
time is set in the computer.
1. Run ThinkPad Setup to reset the time and date
2. Replace the coin-cell battery and run ThinkPad Setup
to reset the time and date.
1802
Unauthorized network card is plugged in—Turn off and
remove the network card.
1. Remove wireless network card.
2. System board
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.
Remove all but the reader that you set up for the
authentication.
2100
Detection error on HDD0 (Main HDD)
1. Reseat the hard disk drive.
2. Hard disk drive
3. System board
2101
Detection error on SSD1 (M.2)
1. Reseat the M.2 solid-state drive.
2. M.2 solid-state drive
3. System board
2102
Detection error on SSD2 (M.2)
1. Reseat the M.2 solid-state drive.
2. M.2 solid-state drive
3. System board
2110
Read error on HDD0 (Main HDD)
1. Reseat the hard disk drive.
2. Hard disk drive
3. System board
2111
Read error on SSD1 (M.2)
1. Reseat the M.2 solid-state drive.
2. Main M.2 solid-state drive
3. System board
2112
Read error on SSD2 (M.2)
1. Reseat the M.2 solid-state drive.
2. Main 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
38 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Table 2. Numeric error codes (continued)
Symptom or error FRU or action, in sequence
2202
Brand Name is invalid. Have the computer serviced.
2203
System configuration is invalid. Have the computer serviced.
2204
System configuration data is invalid. Have the computer serviced.
Error messages
Table 3. Error messages
Symptom or error FRU or action, in sequence
Fan error 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.
If this error happens at a service center, Lenovo
authorized service personnel will clean up the non-volatile
system UEFI variable storage using the preceding
solution.
Beep symptoms
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.
Chapter 4.Related service information 39
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 Solutions
0001: Reset error (platform reset not de-asserted) 1. Remove the ac power adapter and the removable
battery if your computer has one. Then, reset the
computer by doing one of the following:
• For models with the emergency-reset hole,
insert a straightened paper clip into the
emergency-reset hole. Wait for one minute.
Then, reconnect all power resources and restart
the computer.
• For models without the emergency-reset hole,
press and hold the power button for about
seven seconds. Then, reconnect to all power
resources and restart the computer.
2. Replace the system board (service provider only).
0002: Internal bus error Replace the system board (service provider only).
0281: General embedded controller error Replace the system board (service provider only).
0282: Memory module error 1. Reinstall or replace the memory module.
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 Replace the system board (service provider only).
40 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
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).
No-beep symptoms
Table 4. No-beep symptoms
Symptom or error FRU or action, in sequence
No beep, system-status indicator on, LCD blank, and no
POST.
1. Run LCD Self Test.
2. Ensure that every connector is connected tightly and
correctly.
3. Reseat memory module.
4. Replace the system board.
No beep, system-status indicator on, and LCD blank
during POST. 1. Run LCD Self Test.
2. Reseat memory module.
3. Replace the system board.
The power-on password prompt appears. A power-on password or a supervisor password is
set. Type the password and press Enter.
The hard-disk password prompt appears. A hard-disk password is set. Type the password and
press Enter.
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.
LCD Self Test
When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether
the LCD functions normally.
To run LCD Self Test:
Chapter 4.Related service information 41
1. Ensure that the computer is connected to ac power. Then, press the power button for about seven
seconds to turn off the computer.
2. Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in
sequence across the entire screen, it indicates that the LCD functions normally.
3. The test lasts for about 20 seconds and then exits automatically. You also can press the power button to
exit the test.
Table 5. LCD-related symptoms
Symptom or error FRU or action, in sequence
No beep, power-on indicator on, and a blank LCD during
POST.
1. Run LCD Self Test.
2. 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. See important note for “LCD-related symptoms.”
2. Reseat the LCD connectors.
3. Replace the LCD assembly.
4. Replace the system board.
Horizontal or vertical lines displayed on LCD. 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.
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.
42 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
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
Chapter 4.Related service information 43
44 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 5. YOGA Modes (for X1 Yoga)
The computer display can be opened to any angle within a range of up to 360 degrees as shown in the
following illustration.
By rotating the display to different angle, your computer features the following four YOGA Modes. You can
switch between different modes according to your preference and working convenience.
© Copyright Lenovo 2020 45
Notebook mode Stand mode
Tent mode Tablet mode
46 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 6. Special keys
The special keys on the keyboard help you work more easily and effectively.
1. Windows logo key
Open the Start menu.
For information about using this key with other keys, see the Windows help
information.
2. CapsLock key
Switch the letter case between the upper case and lower case.
When the key indicator is on, you can type uppercase letters.
3. F1–F12 function keys
Invoke the special function printed as an icon on each key or standard function.
To choose whether to invoke the special function or standard function:
1. Go to Control Panel and view by Large icons or Small icons.
2. Click Keyboard or Lenovo - Keyboard Manager and select the option of
your preference.
Switch the function of the F1–F12 keys between the standard function and special
function printed as an icon on each key.
When the Fn Lock indicator is on:
• Press F1-F12 to use the standard function.
• Press Fn+F1-F12 to use the special function.
When the Fn Lock indicator is off:
• Press Fn+F1-F12 to use the standard function.
• Press F1-F12 to use the special function.
Mute or unmute the speakers.
When the key indicator is on, the speakers are muted.
If you mute the speakers and turn off your computer, the speakers remain muted
when you turn on your computer.
Volume down.
© Copyright Lenovo 2020 47
Volume up.
Mute or unmute the microphones.
When the key indicator is on, the microphones are muted.
Brightness down.
Brightness up.
Manage external displays.
Enable or disable the built-in wireless features.
Open or collapse the notification center.
Answer incoming calls.
This function only works with some apps, such as Skype for Business 2016 and
Microsoft Teams 1.0.
By default, the function works with Skype for Business 2016. You can change the
default setting on Lenovo Vantage.
Decline incoming calls.
This function only works with some apps, such as Skype for Business 2016 and
Microsoft Teams 1.0.
By default, the function works with Skype for Business 2016. You can change the
default setting on Lenovo Vantage.
Note: You can also press F11 to hang up ongoing calls on Skype for Business
2016.
Invoke the function defined by yourself.
You can define different functions for the F12 key on Lenovo Vantage.
Open the Snipping Tool program.
Fn+Spacebar Switch between different keyboard backlight statuses if your computer supports
keyboard backlight.
Fn+B Equal the Break key on a conventional external keyboard.
Fn+K Equal the ScrLK or Scroll Lock key on a conventional external keyboard.
Fn+P Equal the Pause key on a conventional external keyboard.
Fn+S Equal the SysRq key on a conventional external keyboard.
Fn+4 Put the computer to sleep mode. To wake up the computer, press Fn or the power
button.
Fn+D If your computer supports the Privacy Guard feature, press Fn+D to enable or
disable this feature.
Fn+Left arrow key Equal the Home key.
Fn+Right arrow key Equal the End key.
48 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 7. Locations
This chapter introduces the locations of the hardware components on your computer.
Locating computer controls, connectors, and indicators
This topic introduces the locations of the computer controls, connectors, and indicators.
Front
X1 Yoga Gen 5
© Copyright Lenovo 2020 49
X1 Carbon Gen 8
1. Microphones 4. Camera with IR function*
2. Infrared LED* 5. Camera
3. ThinkShutter 6. Multi-touch screen*
* for selected models
Base
X1 Yoga Gen 5
50 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
X1 Carbon Gen 8
1. Fingerprint reader 4. TrackPoint® pointing device
2. NFC mark* 5. Speakers
3. Trackpad
* for selected models
Left
1. Thunderbolt™ 3 connectors (USB-C) 4. USB 3.2 connector Gen 2
2. Ethernet extension connector Gen 2 5. HDMI™ connector
3. Docking-station connector 6. Audio connector
Chapter 7.Locations 51
Right
X1 Yoga Gen 5
X1 Carbon Gen 8
1. ThinkPad Pen Pro 3. Always On USB 3.2 connector Gen 2
2. Power button 4. Mini security-lock slot
52 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Bottom view
1. Emergency-reset hole 3. Speakers
2. Docking-station hook holes
Locating FRUs and CRUs
This topic introduces the following service parts:
• “Major FRUs and CRUs (for X1 Yoga Gen 5)” on page 56
• “Major FRUs and CRUs (for X1 Carbon Gen 8)” on page 58
• “LCD FRUs (for X1 Carbon Gen 8)” on page 60
• “Miscellaneous parts and other FRUs” on page 61
• “Connector and cable guide” on page 61
Notes:
• 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 Documentation 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 FRUs:
– 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.
54 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
– 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.
• Each FRU/CRU is available for all types or models, unless otherwise specified.
Chapter 7.Locations 55
Major FRUs and CRUs (for X1 Yoga Gen 5)
a
c
b
d
56 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
No. FRU descriptions Self-service CRU Optional-service
CRU
1LCD unit
Note: LCD unit is a single FRU.
No No
2 Insulation tape for trackpad No No
3Trackpad (for models without NFC)* No No
4 Keyboard bezel assembly with keyboard No No
5Trackpad (for models with NFC)* No No
6Speaker kit No No
7Built-in battery No No
8Coin-cell battery No No
9 M.2 solid-state drive* No Yes
10 Thermal pad for M.2 solid-state drive* No No
11 Foam for NFC module* No No
12 NFC module* No No
13 Wireless-WAN card* Yes No
14 Wireless-WAN antenna assembly* No No
15 Base cover assembly Yes No
16 USB and power board No No
17 System board No No
18 Fingerprint reader module No No
19 Fingerprint reader bracket No No
20 Thermal fan assembly No No
21 Trackpad and fingerprint reader cable (for models with
NFC)*
No No
22 Trackpad and fingerprint reader cable (for models
without NFC)*
No No
23 ThinkPad Pen Pro Yes No
24 Pen charger Yes No
25 Nano-SIM-card tray* Yes No
aRecovery USB Yes No
b Power cord Yes No
cac power adapter Yes No
dMiscellaneous parts (See “Miscellaneous parts and
other FRUs” on page 61.)
No No
* for selected models
Chapter 7.Locations 57
Major FRUs and CRUs (for X1 Carbon Gen 8)
a
c
b
d
58 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
No. FRU descriptions Self-service CRU Optional-service
CRU
1LCD unit
Note: LCD unit is not a single FRU. See “LCD FRUs
(for X1 Carbon Gen 8)” on page 60.
No No
2 Insulation tape for trackpad No No
3Trackpad (for models without NFC)* No No
4 Keyboard bezel assembly with keyboard No No
5Trackpad (for models with NFC)* No No
6Speaker kit No No
7 Built-in battery No No
8Coin-cell battery No No
9 M.2 solid-state drive* No Yes
10 Thermal pad for M.2 solid-state drive* No No
11 Foam for NFC module* No No
12 NFC module* No No
13 Wireless-WAN card* Yes No
14 Wireless-WAN antenna assembly* No No
15 Base cover assembly Yes No
16 USB and power board No No
17 System board No No
18 Fingerprint reader module No No
19 Fingerprint reader bracket No No
20 Thermal fan assembly No No
21 Trackpad and fingerprint reader cable (for models with
NFC)*
No No
22 Trackpad and fingerprint reader cable (for models
without NFC)*
No No
23 Wireless-LAN antenna assembly* No No
24 Nano-SIM-card tray* Yes No
aRecovery USB Yes No
b Power cord Yes No
cac power adapter Yes No
dMiscellaneous parts (See “Miscellaneous parts and
other FRUs” on page 61.)
No No
* for selected models
Chapter 7.Locations 59
LCD FRUs (for X1 Carbon Gen 8)
No. FRU descriptions Self-service CRU Optional-service
CRU
1LCD bezel sheet No No
2 Foam for IR LED No No
3Camera module No No
4 B2B stopper No No
5ThinkShutter No No
6LCD panel No No
7Support plate No No
8LCD rear cover assembly No No
9LCD cable No No
10 Hinges No No
11 LCD bezel frame No No
60 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Miscellaneous parts and other FRUs
FRU descriptions Self-service CRU Optional-service CRU
Screw and tape kit (for X1 Yoga Gen 5)
• M2.5 x L4 (12)
• M2.0 x L2.2 (12)
• M2.0 x L2.8 (10)
• M2.0 x L3.2 (20)
• M2.0 x L2.2, big hat (6)
• M2.0 x L4.5 (12)
• M1.6 x L2.6 (6)
• M2.0 x L1.8 (8)
• Tape 10*20 (for fixing FPR cable)
NO NO
Screw and tape kit (for X1 Carbon Gen 8)
• M2.5 x L2.2, big head (8)
• M2.5 x L4 (12)
• M2.0 x L4 (12)
• M2.0 x L1.8 (8)
• M2.0 x L3.7+1.8 (12)
• M2.0 x L2.8 (10)
• M2.0 x L3.2 (16)
• M2.0 x L2.2 (6)
• M2.0 x L4.5 (12)
• M1.6 x L2.6 (6)
NO NO
Label kit NO NO
Connector and cable guide
This section provides information for Lenovo authorized service technicians to help identify connectors and
cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see “Major
FRUs and CRUs (for X1 Yoga Gen 5)” on page 56, “Major FRUs and CRUs (for X1 Carbon Gen 8)” on page
58, and “LCD FRUs (for X1 Carbon Gen 8)” on page 60.
Note: Depending on your model, some connectors or cables might not be available.
System board connectors and cables
Chapter 7.Locations 61
Item Connector (location) Internal cable required Cable connection
1Camera/LED connector
(internal) • X1 Yoga Gen 5: the LCD
unit comes with the cable.
• X1 Carbon Gen 8: the LCD
rear cover assembly comes
with the cable.
• X1 Yoga Gen 5: the LCD unit comes with
the cable. Connect the cable to this
connector.
• X1 Carbon Gen 8: the LCD rear cover
assembly comes with the cable. Connect
the cable to this connector.
2LCD connector (internal) • X1 Yoga Gen 5: the LCD
unit comes with the cable.
• X1 Carbon Gen 8: LCD
cable.
• X1 Yoga Gen 5: the LCD unit comes with
the cable. Connect the cable to this
connector.
• X1 Carbon Gen 8: Connect one end to the
LCD panel and the other end to this
connector.
3Speaker connector (near
the hinges) (internal)
Speaker assembly with cable The speaker assembly comes with a cable.
Connect the cable to this connector.
4M.2 SSD slot (internal) No Insert an M.2 SSD into this slot.
5Speaker connector (near
the built-in battery)
(internal)
Speaker assembly with cable The speaker assembly comes with a cable.
Connect the cable to this connector.
6Thunderbolt 3 connector
(USB-C) (external)
No Connect a USB-C compatible device or a
Thunderbolt-3 compatible device or a USB-C
power adapter to this connector.
7Thunderbolt 3 connector
(USB-C) (external)
No Connect a USB-C compatible device or a
Thunderbolt-3 compatible device or a USB-C
power adapter to this connector.
8Ethernet extension
connector Gen 2
(external)
No Connect to a local area network (LAN) through
this connector using an Ethernet extension
adapter Gen 2.
9Docking-station
connector (external)
No Connect a supported docking station.
10 USB 3.1 connector Gen 1
(external)
No Connect USB-A compatible devices.
11 HDMI connector (external) No Connect a compatible digital audio device or
video monitor to this connector.
12 Audio connector (external) No Connect headphones or a headset to this
connector.
62 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Item Connector (location) Internal cable required Cable connection
13 Coin-cell battery
connector (internal)
Coin-cell battery with cable The coin-cell battery comes with a cable.
Connect the cable to this connector.
14 P-sensor connector
(internal)
WWAN antenna assembly
comes with the cables
The WWAN antenna assembly comes with the
P-sensor cable. Connect the cable to this
connector.
15 Keyboard connector
(internal)
Keyboard assembly with
cables
The keyboard assembly comes with cables.
Connect the keyboard cable to this connector.
16 TrackPoint connector
(internal)
Keyboard assembly with
cables
The keyboard assembly comes with cables.
Connect the TrackPoint cable to this
connector.
17 WWAN card slot (internal) No Insert a WWAN card into this slot.
18 Built-in battery connector
(internal)
Built-in battery with cable The built-in battery comes with a cable.
Connect the cable to this connector.
19 Trackpad/fingerprint
reader/NFC connector
(internal)
Tackpad and fingerprint
reader cable
See “Trackpad and fingerprint reader cable” on
page 63.
20 USB and power board
connector (internal)
USB and power board with
cable
The USB and power board comes with a cable.
Connect the cable to this connector.
21 Thermal fan connector
(internal)
Thermal fan assembly with
cable
The thermal fan assembly comes with cable.
Connect the cable to this connector.
22 Nano-SIM-card slot
(external)
No Insert a nano-SIM-card into this slot to
establish WWAN connection.
Trackpad and fingerprint reader cable
for models without NFC
Chapter 7.Locations 63
for models with NFC
Item Connector (location) Cable connection
1Trackpad/fingerprint reader/NFC
connector
Connect this end to the trackpad and fingerprint reader connector on
the system board.
2Trackpad connector Connect this end to the trackpad.
3Fingerprint reader connector Connect this end to the fingerprint reader module.
4NFC module connector Connect this end to the NFC module.
Looking up FRU information
For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to
https://support.lenovo.com/partslookup.
64 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 8. 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 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.
Service tool kit
Ensure that the following service tool kit is prepared before you service a ThinkPad notebook computer.
No. Tool name Tool type
1 Phillips-head screwdriver Common tool
2 Torx-head screwdriver Common tool
3Conductive tweezers Common tool
4 Hexagonal socket Common tool
5Silicone grease Consumable tool
6 Polyamide tape Consumable tool
7 Mylar tape Consumable tool
8 Eraser Consumable tool
9 Electrical tape Consumable tool
10 Double-sided tape Consumable tool
11 Conductive tape Consumable tool
Note: The silicone grease can be applied to the surfaces of the microprocessor and heatsink to eliminate air
gaps. The hexagonal socket is used to pick up the antenna connectors.
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.
© Copyright Lenovo 2020 65
• 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.
Sensor calibration (for X1 Yoga Gen 5 only)
If your system board or LCD unit has been replaced, do the following to make sensor calibration:
1. Download the Windows Sensor Calibration Tool from https://support.lenovo.com.
2. Extract the tool into a local driver, such as D:\WinCalibration.
3. Type WindowsCalibrationTool.exe –calibrate a –minimal –updateiss –primaryonly to create a Update.bat
file as shown. Then, copy the file to the same folder of the Windows Sensor Calibration Tool.
4. Run the Update.bat file as Administrator.
66 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
5. Lay down the computer with the LCD panel facing up as shown and then follow the on-screen
instructions to start the calibration process.
6. Rotate the computer into Tablet mode and then follow the on-screen instructions to complete the
calibration process.
Note: You might need to rotate the LCD display in every aspect to ensure each YOGA mode works well.
Retaining serial numbers
This section includes the following descriptions:
• “Restoring the serial number of the system unit” on page 67
• “Retaining the UUID” on page 68
• “Reading or writing the ECA information” on page 68
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.
2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a
Maintenance Key.
Chapter 8.FRU replacement notices 67
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.
Reading or writing the ECA information
Information on 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.
68 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
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.
Chapter 8.FRU replacement notices 69
70 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Chapter 9. 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 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 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 8 “FRU replacement notices” on page 65.
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.
© Copyright Lenovo 2020 71
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 FRU/CRU, ensure that you 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
If the computer has a nano-SIM card installed, remove the nano-SIM card before you start the servicing. The
following is the removal procedure of the nano-SIM card.
After you finish the servicing, ensure that you install the removed nano-SIM card back into the computer.
Removing ThinkPad Pen Pro (for X1 Yoga Gen 5)
If the computer has a ThinkPad Pen Pro installed, remove the pen before you start servicing.
72 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of the base cover assembly (for X1 Carbon Gen 8)
Label locations on the base cover assembly
The following illustration shows the location of each label.
1 IMEI label 2 Country label
3 Asset tag 4 Windows label
5 S/N label 6 CECP label
7 GEO label (TaiWan/Argentina) 8 GEO label (Mainland China/Korea/Mexico/Belarus/
Kazakhstan/Russia Morocco/Serbia/Ukraine)
9 GEO label (India) 9 GEO label (US/Japan)
1020 M.2 SSD and thermal pad
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
74 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
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 sleep mode.
If your computer is installed with a hybrid solid-state drive (with Intel Optane memory), go to https://
support.lenovo.com/docs/tg_ssd to know the details on how to replace it.
Removal steps of the M.2 SSD and the thermal pad
Step Screw (quantity) Color Torque
1M2 × L2.2 mm, big-hat (1) Black 0.181 Nm
(1.85 kgf-cm)
1030 WWAN card
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
Chapter 9.Removing or replacing a FRU 75
Removal steps of the WWAN card
Step Screw (quantity) Color Torque
2M2 × L2.2 mm, big-hat (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.
1040 Pen charger (for X1 Yoga Gen 5)
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
Removal steps of the pen charger
76 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Step Screw (quantity) Color Torque
1M2 × L4.5 mm, flat-head, nylon-coated (1) Silver 0.181 Nm
(1.85 kgf-cm)
1050 Thermal fan assembly
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
Removal steps of the thermal fan assembly
2a
2c
2d
2b
When installing:
• Ensure that the connector is attached firmly.
• Do not press the top of the fan cover and the fan hub.
• Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on
the part marked a as shown in the following illustrations. Either too much or too less application of grease
can cause a thermal problem due to imperfect contact with a component.
1060 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.
The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the
battery is defective. A battery FRU should not be replaced unless this diagnostic test shows that the battery
is defective. The only exception to this is if the battery is physically damaged or a customer is reporting a
possible safety issue.
Chapter 9.Removing or replacing a FRU 77
If the Lenovo Solution Center program is not installed on the computer, the customer should download and
install the program to diagnose the battery, before getting a non-physically damaged battery replaced. Note
that the replacement of a physically damaged battery is not covered by the warranty.
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
Removal steps of the built-in battery
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
Step Screw (quantity) Color Torque
3M2 × L4.5 mm, flat-head, nylon-coated (6) Silver 0.181 Nm
(1.85 kgf-cm)
78 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Installation steps of the built-in battery
DANGER
Use only the authorized battery specified for your computer. Any other battery could ignite or
explode.
Step Screw (quantity) Color Torque
2M2 × L4.5 mm, flat-head, nylon-coated (6) Silver 0.181 Nm
(1.85 kgf-cm)
1070 USB and power board
For access, remove this FRU:
• “1010 Base cover assembly” on page 73
• “1040 Pen charger (for X1 Yoga Gen 5)” on page 76
• “1060 Built-in battery” on page 77
Chapter 9.Removing or replacing a FRU 79
Removal steps of the USB and power board
Step Screw (quantity) Color Torque
1M2 × L3.2 mm, flat-head shoulder, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
1080 Trackpad and fingerprint reader cable
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 73
• “1060 Built-in battery” on page 77
Removal steps of the trackpad and fingerprint reader cable
80 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of the fingerprint reader module and bracket
Step Screw (quantity) Color Torque
1M2 × L2.2 mm, big-hat (1) Silver 0.181 Nm
(1.85 kgf-cm)
1100 Trackpad and trackpad insulation tape
For access, remove these FRUs:
• “1010 Base cover assembly” on page 73
• “1060 Built-in battery” on page 77
Removal steps of the trackpad and trackpad insulation tape
82 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of the coin-cell battery (for X1 Yoga Gen 5)
Removal steps of the coin-cell battery (for X1 Carbon Gen 8)
1130 Wireless-WAN antenna assembly
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 73
• “1060 Built-in battery” on page 77
Removal steps of WWAN antenna assembly
Chapter 9.Removing or replacing a FRU 85
Step Screw (quantity) Color Torque
1M2 × L3.2 mm, flat-head, nylon-coated (4) Silver 0.181 Nm
(1.85 kgf-cm)
2M1.6 × L2.6 mm, flat-head, nylon-coated (3) Silver 0.181 Nm
(1.85 kgf-cm)
Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause
the cables to be damaged by the cable guides, or a wire to be broken.
1140 Speaker assembly near the built-in battery
For access, remove these FRUs:
• “1010 Base cover assembly” on page 73
• “1060 Built-in battery” on page 77
• “1130 Wireless-WAN antenna assembly” on page 85
Removal steps of the speaker assembly near the built-in battery (for X1 Yoga Gen 5)
86 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Step Screw (quantity) Color Torque
3M2 × L3.7+1.8 mm, flat-head shoulder, nylon-coated (6) Black 0.181 Nm
(1.85 kgf-cm)
Removal steps of the speaker assembly near the built-in battery (for X1 Carbon Gen 8)
Step Screw (quantity) Color Torque
3M2 × L3.7+1.8 mm, flat-head shoulder, nylon-coated (6) Black 0.181 Nm
(1.85 kgf-cm)
Chapter 9.Removing or replacing a FRU 87
1150 System board assembly
Note: If you replace the system board of X1 Yoga Gen 5, remember to make the sensor calibration. For
details, see “Sensor calibration (for X1 Yoga Gen 5 only)” on page 66.
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 73
• “1020 M.2 SSD and thermal pad” on page 74
• “1030 WWAN card” on page 75
• “1050 Thermal fan assembly” on page 77
• “1060 Built-in battery” on page 77
Removal steps of the system board assembly
This computer shares a common system board with another computer. After replacing the system board,
you will be prompted to input a brand name to correctly identify the machine type. The following table
contains the brand name required to complete this step.
Note: Input the exact brand name as shown in this table.
Brand name Machine types Shared with
ThinkPad X1 Yoga Gen 5 20UB and 20UC ThinkPad X1 Carbon Gen 8
ThinkPad X1 Carbon Gen 8 20U9 and 20UA ThinkPad X1 Yoga Gen 5
88 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
1160 Speaker assembly near the hinges
For access, remove these FRUs:
• “1010 Base cover assembly” on page 73
• “1020 M.2 SSD and thermal pad” on page 74
• “1030 WWAN card” on page 75
• “1050 Thermal fan assembly” on page 77
• “1060 Built-in battery” on page 77
• “1150 System board assembly” on page 88
Removal steps of the speaker assembly near the hinges (for X1 Yoga)
Step Screw (quantity) Color Torque
1M2 × L3.2 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
90 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
1170 Wireless-LAN antenna assembly (for X1 Carbon Gen 8)
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 73
• “1020 M.2 SSD and thermal pad” on page 74
• “1030 WWAN card” on page 75
• “1050 Thermal fan assembly” on page 77
• “1060 Built-in battery” on page 77
• “1150 System board assembly” on page 88
• “1160 Speaker assembly near the hinges” on page 90
Removal steps of WLAN antenna assembly
Step Screw (quantity) Color Torque
1M2 × L3.2 mm, flat-head, nylon-coated (2) Silver 0.181 Nm
(1.85 kgf-cm)
Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause
the cables to be damaged by the cable guides, or a wire to be broken.
1180 LCD unit
Note: If you replace the system board of X1 Yoga Gen 5, remember to make the sensor calibration. For
details, see “Sensor calibration (for X1 Yoga Gen 5 only)” on page 66.
For access, remove these FRUs in order:
92 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of the LCD unit (for X1 Carbon Gen 8)
Step Screw (quantity) Color Torque
7M2.5 × L4 mm, flat-head, nylon-coated (6) Black 0.294 Nm
(3.0 kgf-cm)
1190 Keyboard bezel assembly with keyboard
To remove the keyboard bezel assembly, remove these FRUs in order:
• “1010 Base cover assembly” on page 73
• “1020 M.2 SSD and thermal pad” on page 74
• “1030 WWAN card” on page 75
• “1040 Pen charger (for X1 Yoga Gen 5)” on page 76
• “1050 Thermal fan assembly” on page 77
• “1060 Built-in battery” on page 77
• “1070 USB and power board” on page 79
• “1080 Trackpad and fingerprint reader cable” on page 80
• “1090 Fingerprint reader module and bracket” on page 81
94 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
• “1110 NFC module and the sponge” on page 83
• “1120 Coin-cell battery” on page 84
• “1130 Wireless-WAN antenna assembly” on page 85
• “1140 Speaker assembly near the built-in battery” on page 86
• “1150 System board assembly” on page 88
• “1160 Speaker assembly near the hinges” on page 90
• “1170 Wireless-LAN antenna assembly (for X1 Carbon Gen 8)” on page 92
• “1180 LCD unit” on page 92
Removing an LCD FRU (for X1 Carbon Gen 8)
This section provides instructions on how to remove an LCD FRU of ThinkPad X1 Carbon Gen 8.
2010 LCD Bezel sheet
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
Removal steps of the LCD bezel sheet
When installing: After the LCD bezel sheet is removed, it cannot be used anymore. A new LCD bezel sheet
is required for replacement.
2020 Hinges
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
Chapter 9.Removing or replacing a FRU 95
Removal steps of the hinges
Step Screw (quantity) Color Torque
1M2.5 × L2.2 mm, big-hat (4) Black 0.294 Nm
(3 kgf-cm)
2030 Bezel frame
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
• “2020 Hinges” on page 95
96 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of the bezel frame
2040 LCD panel and LCD cable
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
• “2020 Hinges” on page 95
• “2030 Bezel frame” on page 96
Removal steps of the LCD panel and the LCD cable
Chapter 9.Removing or replacing a FRU 97
2050 B2B stopper
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
Removal steps of the B2B stopper
2060 ThinkShutter
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
98 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Removal steps of ThinkShutter
2070 Support plate
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
Removal steps of the support plate
2080 Camera module
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
• “2020 Hinges” on page 95
• “2030 Bezel frame” on page 96
• “2040 LCD panel and LCD cable” on page 97
• “2050 B2B stopper” on page 98
• “2060 ThinkShutter” on page 98
Chapter 9.Removing or replacing a FRU 99
Removal steps of the camera module
2090 Rear cover assembly
For access, remove these FRUs in order:
• “1180 LCD unit” on page 92
• “2010 LCD Bezel sheet” on page 95
• “2020 Hinges” on page 95
• “2030 Bezel frame” on page 96
• “2040 LCD panel and LCD cable” on page 97
• “2050 B2B stopper” on page 98
• “2060 ThinkShutter” on page 98
• “2070 Support plate” on page 99
• “2080 Camera module” on page 99
100 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Appendix A. Notices
Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult
your local Lenovo representative for information on the products and services currently available in your
area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that
Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service
that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user’s
responsibility to evaluate and verify the operation of any other product, program, or service.
Lenovo may have patents or pending patent applications covering subject matter described in this
document. The furnishing of this document does not give you any license to these patents. You can send
license inquiries, in writing, to:
Lenovo (United States), Inc.
1009 Think Place - Building One
Morrisville, NC 27560
U.S.A.
Attention: Lenovo Director of Licensing
LENOVO PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow
disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to
you.
This information could include technical inaccuracies or typographical errors. Changes are periodically made
to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may
make improvements and/or changes in the product(s) and/or the program(s) described in this publication at
any time without notice.
The products described in this document are not intended for use in implantation or other life support
applications where malfunction may result in injury or death to persons. The information contained in this
document does not affect or change Lenovo product specifications or warranties. Nothing in this document
shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or
third parties. All information contained in this document was obtained in specific environments and is
presented as an illustration. The result obtained in other operating environments may vary.
Lenovo may use or distribute any of the information you supply in any way it believes appropriate without
incurring any obligation to you.
Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in
any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the
materials for this Lenovo product, and use of those Web sites is at your own risk.
Any performance data contained herein was determined in a controlled environment. Therefore, the result
obtained in other operating environments may vary significantly. Some measurements may have been made
on development-level systems and there is no guarantee that these measurements will be the same on
generally available systems. Furthermore, some measurements may have been estimated through
extrapolation. Actual results may vary. Users of this document should verify the applicable data for their
specific environment.
© Copyright Lenovo 2020 101
Electromagnetic emission notices
For electromagnetic information on Class B digital devices, refer to the corresponding information in the User
Guide.
EU Contact: Lenovo (Slovakia), Landererova 12, 811 09 Bratislava, Slovakia
Trademarks
LENOVO, LENOVO logo, THINKPAD, THINKPAD logo and TRACKPOINT are trademarks of Lenovo.
Microsoft and Windows are trademarks of the Microsoft group of companies. Intel and Optane are
trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. 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. USB-C is a trademark of USB Implementers Forum. All other
trademarks are the property of their respective owners. © 2020 Lenovo
102 X1 Yoga Gen 5 and X1 Carbon Gen 8 Hardware Maintenance Manual
Part Number: SP40T10073
Printed in
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