Table of Contents
- About this manual
- Chapter 1. Safety information
- Chapter 2. General checkout
- Chapter 3. Identifying FRUs (CRUs)
- Chapter 4. Removing a FRU or CRU
- Service tools
- General guidelines
- Remove the lower case
- Remove the battery pack
- Remove the heat sink
- Remove the solid-state drive (SSD)
- Remove the I/O bracket (right)
- Remove the fans
- Remove the I/O bracket (left)
- Remove the I/O board
- Remove the fingerprint board module
- Remove the speakers
- Remove the system board and the I/O board cable
- Remove the touchpad with cable
- Remove the LCD unit
- Remove the upper case (with keyboard)
- Disassemble the LCD unit
- Remove the hinge cover
- Remove the hinge rubbers
- Remove the LCD bezel
- Remove the camera privacy shutter
- Remove the hinges
- Remove the LCD panel and the EDP cable
- Remove the microphone rubbers
- Remove the camera
- Remove the microphone board with cables
- Remove the trans board with cable
- Remove the LCD cover
- Appendix A. Label locations
- Trademarks
Lenovo 13s User Manual
Displayed below is the user manual for 13s by Lenovo which is a product in the Notebooks category. This manual has pages.
Related Manuals
Hardware Maintenance Manual
Lenovo ThinkBook 13s Gen 3 and Lenovo ThinkBook 14s Gen 3
First Edition (March 2021)
© Copyright Lenovo 2021.
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. General checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
CRU list . . . . . . . . . . . . . . . . . . 22
Chapter 3. Identifying FRUs
(CRUs) . . . . . . . . . . . . . . . . . 23
Locate FRUs and CRUs . . . . . . . . . . . 23
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 29
Service tools . . . . . . . . . . . . . . . . 29
General guidelines. . . . . . . . . . . . . . 29
Remove the lower case . . . . . . . . . . . . 30
Remove the battery pack . . . . . . . . . . . 31
Remove the heat sink . . . . . . . . . . . . 32
Remove the solid-state drive (SSD) . . . . . . . 33
Remove the I/O bracket (right) . . . . . . . . . 33
Remove the fans . . . . . . . . . . . . . . 35
Remove the I/O bracket (left). . . . . . . . . . 36
Remove the I/O board . . . . . . . . . . . . 37
Remove the fingerprint board module . . . . . . 38
Remove the speakers . . . . . . . . . . . . 39
Remove the system board and the I/O board
cable . . . . . . . . . . . . . . . . . . . 40
Use a Golden Key U1 tool to flash-write key id
information . . . . . . . . . . . . . . . 42
Remove the touchpad with cable . . . . . . . . 42
Remove the LCD unit . . . . . . . . . . . . 44
Remove the upper case (with keyboard) . . . . . 45
Disassemble the LCD unit . . . . . . . . . . . 45
Remove the hinge cover. . . . . . . . . . 46
Remove the hinge rubbers . . . . . . . . . 46
Remove the LCD bezel . . . . . . . . . . 47
Remove the camera privacy shutter . . . . . 47
Remove the hinges. . . . . . . . . . . . 48
Remove the LCD panel and the EDP cable . . 49
Remove the microphone rubbers . . . . . . 50
Remove the camera . . . . . . . . . . . 50
Remove the microphone board with cables . . 51
Remove the trans board with cable . . . . . 52
Remove the LCD cover . . . . . . . . . . 53
Appendix A. Label locations. . . . . . 55
Trademarks . . . . . . . . . . . . . . . . lvii
© Copyright Lenovo 2021 i
ii Hardware Maintenance Manual
About this manual
This manual contains service and reference information for the following Lenovo products.
Machine Machine type (MT)
ThinkBook 13s G3 ACN 20YA
ThinkBook 14s G3 ACN 20YB
Important:
• This manual is intended only for trained service technicians who are familiar with Lenovo products.
• Before servicing a Lenovo product, be sure to read all the information under Chapter 1 “Safety
information” on page 1.
© Copyright Lenovo 2021 iii
iv Hardware Maintenance Manual
Chapter 1. Safety information
This chapter presents the following safety information that you need to be familiar with before you service a
Lenovo notebook computer.
General safety
Follow these rules to ensure general safety:
• Observe good housekeeping in the area of the machines during and after maintenance.
• When lifting any heavy object:
1. 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 tool case away from walk areas so that other people will not trip over it.
• Do not wear loose clothing that can be trapped in the moving parts of a machine. 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 non-conductive clip, about 8
centimeters (3 inches) from the end.
• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
Attention: Metal objects are good electrical conductors.
• Wear safety glasses when you are hammering, drilling, soldering, cutting wire, attaching springs, using
solvents, or working in any other conditions that might be hazardous to your eyes.
• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that
is worn or defective.
• Reinstall all covers correctly before returning the machine to the customer.
• Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan
louvers or cover them with labels or stickers.
Electrical safety
Observe the following rules when working on electrical equipment.
Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft
material that does not insulate you when working with live electrical currents.Many customers have, near
their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.
Do not use this type of mat to protect yourself from electrical shock.
• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical
accident occurs, you can then operate the switch or unplug the power cord quickly.
• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.
• Disconnect all power before:
– Performing a mechanical inspection
– Working near power supplies
© Copyright Lenovo 2021 1
– 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 need to work on a machine that has exposed electrical circuits, observe the following precautions:
– Ensure that another person, familiar with the power-off controls, is near you.
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,
non-grounded 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-Lenovo features or options not covered by this inspection
guide.
If any unsafe conditions are present, you must determine how serious the apparent hazard could be and
whether you can continue without first correcting the problem.
Consider these conditions and the safety hazards they present:
• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal
electrical shock)
• Explosive hazards, such as a damaged cathode ray tube (CRT) face or a bulging capacitor
• Mechanical hazards, such as loose or missing hardware
2Hardware Maintenance Manual
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: http://
www.lenovo.com/serviceparts-lookup
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-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo
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.
– 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.
Chapter 1.Safety information 3
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
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PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
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DANGER
DANGER
DANGER
DANGER
VORSICHT
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VORSICHT
VORSICHT
VORSICHT
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20 Hardware Maintenance Manual
Chapter 2. General checkout
This chapter contains the following topics:
Before you go to the checkout instructions, ensure that you 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.
• Be extremely careful during such write operations as copying, saving, or formatting. Drives in the computer
that you are servicing sequence might have been altered. If you select an incorrect drive, data or programs might be
overwritten.
• Replace an FRU only with another FRU of the correct model. When you replace an FRU, make sure that the
model of the machine and the FRU part number are correct by referring to the FRU parts list.
• An FRU should not be replaced because of a single, unreproducible failure. Single failures can occur for a
variety of reasons that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge,
or software errors. Consider replacing an FRU only when a problem recurs. If you suspect that an 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 an FRU, you must include the following information in the parts exchange form or parts
return form that you attach to it:
1. Name and phone number of service technician
2. Date of service
3. Date on which the machine failed
4. Date of purchase
5. Failure symptoms, error codes appearing on the display, and beep symptoms
6. Procedure index and page number in which the failing FRU was detected
7. Failing FRU name and part number
8. Machine type, model number, and serial number
9. Customer's name and address
Note: During the warranty period, the customer may be responsible for repair costs if the computer damage
was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper
maintenance by the customer. Following is a list of some common items that are not covered under warranty
and some symptoms that might indicate that the system was subjected to stress beyond normal use.
Before checking problems with the computer, determine whether the damage is covered under the warranty
by referring to the following list:
The following are not covered under warranty:
• LCD panel cracked from the application of excessive force or from being dropped
• Scratched (cosmetic) parts
• Distortion, deformation, or discoloration of the cosmetic parts
• Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force
• Damage caused by liquid spilled into the system
© Copyright Lenovo 2021 21
• Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an
incompatible card
• Improper disc insertion or use of an external optical drive
• Fuses blown by attachment of a non-supported 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 non-warranted 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.
CRU list
Table 1. Model: ThinkBook 13s G3 ACN (MT: 20YA)
CRU Type
ac power adapter self-service
Power cord * self-service
Table 2. Model: ThinkBook 14s G3 ACN (MT: 20YB)
CRU Type
ac power adapter self-service
Power cord * self-service
* for selected models
22 Hardware Maintenance Manual
Chapter 3. Identifying FRUs (CRUs)
Locate FRUs and CRUs
The exploded illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to
replace when servicing a customer’s computer.
© Copyright Lenovo 2021 23
Figure 1. ThinkBook 13s G3 ACN and ThinkBook 14s G3 ACN exploded view
24 Hardware Maintenance Manual
Table 3. FRU (CRU) categories
No. FRU (CRU) category
1Upper case (with keyboard)
2Switch cover
3Fingerprint board
4Fingerprint board cable
5Solid-state drive (SSD)
6SSD Thermalpad
7System board
8I/O board with cable
9I/O bracket (right)
10 Fans
11 Heat sink
12 Battery pack
13 Speakers
14 Lower case
15 I/O bracket (left)
16 Touchpad with cable
aPower cord
bac power adapter
cScrew kit
Chapter 3.Identifying FRUs (CRUs) 25
Figure 2. ThinkBook 13s G3 ACN and ThinkBook 14s G3 ACN LCD unit - exploded view
26 Hardware Maintenance Manual
28 Hardware Maintenance Manual
Chapter 4. Removing a FRU or CRU
Service tools
The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving
the product models as described by this publication. Prepare them before you service the product.
Table 5. Service tools
Service tool and consumable Model applicability
Screw driver (Phillips head) (PH1/PH0) X
Screw driver (Torx head) (T5) X
Screw driver (Torx head) (T30)
Pry tool 1 X
Tweezers (conductive) X
Tweezers (isolated)
Suction cup
Hexagonal socket
Silicone grease
Acetate tape X
Polyamide tape
Mylar tape
Electrical tape
Double-sided tape
Conductive tape
Eraser
Heat gun
Brown brush
Notes:
• T30 screw drivers are used to service the new Intel Xeon CPUs.
• Hexagonal sockets are used to remove antenna connectors.
• Silicone grease is applied to the CPU and heatsink surfaces to eliminate air gaps.
General guidelines
When removing or replacing an FRU, ensure that you 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. 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 procedure. Remove them in the order in which they
are listed.
© Copyright Lenovo 2021 29
3. Follow the correct sequence in the steps for removing an FRU, as shown in the illustrations by the
numbers in square callouts.
4. When removing an FRU, move it in the direction as shown by the arrow in the illustration.
5. To install a new FRU in place, perform the removal procedure in reverse and follow any notes that
pertain to replacement.
6. When replacing an FRU, carefully retain and reuse all screws.
7. When replacing the base cover, reapply all labels that come with the replacement base cover. If some
original labels are not included with the replacement base cover, peel them off from the original base
cover and paste them on the replacement base cover.
DANGER
Before removing any FRU or CRU, shut down the computer and unplug all power cords from
electrical outlets.
Attention: After replacing an FRU, do not turn on the computer until you have ensured 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 ESD. Before touching it, establish
personal grounding by touching a ground point with one hand or by using an ESD strap (P/N 6405959).
Remove the lower case
Make sure the computer has been shut down before servicing the computer.
Step 1. Place the computer upside down on a flat surface.
Step 2. Remove nine screws.
Figure 3. Remove nine screws
Screw specifications Number of screws
M2 x L4 8
M2 x L8 1
30 Hardware Maintenance Manual
Step 3. Pry up the latches and then remove the lower case.
Figure 4. Pry up the latches and remove the lower case
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Lower case
Remove the battery pack
Make sure the following FRU (or CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Release the speaker cable from the cable guide and remove five screws. Then, remove the battery
pack.
Figure 5. Remove five screws and remove the battery pack
Screw specifications Number of screws
M2 x L3 5
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Chapter 4.Removing a FRU or CRU 31
Battery pack
Remove the heat sink
Make sure the following FRU (or CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Peel off the pieces of tape.
Figure 6. Peel off the pieces of tape
Step 3. Remove three screws and then remove the heat sink.
Figure 7. Remove three screws and then remove the heat sink
Screw specifications Number of screws
M2 x L3 3
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
32 Hardware Maintenance Manual
Heat sink
Remove the solid-state drive (SSD)
Make sure the following FRU (or CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Remove one screw.
Figure 8. Remove one screw
Screw specifications Number of screws
M2 x L3 1
Step 3. Remove the SSD by pulling it away from the slot.
Figure 9. Remove the SSD by pulling it away from the slot
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
SSD
Remove the I/O bracket (right)
Make sure the following FRU (or CRU) has been removed.
“Remove the lower case” on page 30
Chapter 4.Removing a FRU or CRU 33
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Peel off the pieces of tape.
Figure 10. Peel off the pieces of tape
Step 3. Release the antenna cable from the cable guide.
Figure 11. Release the antenna cable from the cable guide
Step 4. Remove three screws and then open the hinge.
Figure 12. Remove three screws and then open the hinge
34 Hardware Maintenance Manual
Screw specifications Number of screws
M2.5 x L5 3
Step 5. Remove two screws and then remove the I/O bracket (right).
Figure 13. Remove two screws and remove the I/O bracket (right)
Screw specifications Number of screws
M2 x L4 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
I/O bracket (right)
Remove the fans
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the heat sink” on page 32
Step 1. Peel off the tape and then disconnect the fan cables from the system board.
Figure 14. Peel off the tape and disconnect the fan cables from the system board
Chapter 4.Removing a FRU or CRU 35
Step 2. Release the fan cables from the cable guide. Remove four screws and then remove the fans.
Figure 15. Remove four screws and then remove the fans
Screw specifications Number of screws
M2 x L3 4
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Fans
Remove the I/O bracket (left)
Make sure the following FRU (or CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Peel off the tape.
Figure 16. Peel off the tape
Step 3. Remove three screws and then open the hinge.
36 Hardware Maintenance Manual
Figure 17. Remove three screws and then open the hinge
Screw specifications Number of screws
M2.5 x L5 3
Step 4. Remove two screws and then remove the I/O bracket (left).
Figure 18. Remove two screws and remove the I/O bracket (left)
Screw specifications Number of screws
M2 x L4 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
I/O bracket (left)
Remove the I/O board
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the I/O bracket (right)” on page 33
Step 1. Disconnect the I/O board cable and the fingerprint board cable from the I/O board.
Chapter 4.Removing a FRU or CRU 37
Figure 19. Disconnect the I/O board cable and the fingerprint board cable from the I/O board
Step 2. Remove the I/O board.
Figure 20. Remove the I/O board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
I/O board
Remove the fingerprint board module
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the I/O bracket (right)” on page 33
“Remove the I/O board” on page 37
Step 1. Remove the fingerprint board module.
38 Hardware Maintenance Manual
Figure 21. Remove the fingerprint board module
Step 2. Remove the switch cover.
Figure 22. Remove the switch cover
Step 3. Separate the fingerprint board cable from the fingerprint board.
Figure 23. Separate the fingerprint board cable from the fingerprint board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Switch cover
Fingerprint board
Fingerprint board cable
Remove the speakers
Make sure the following FRU (CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Disconnect the speaker cable from the system board and release the speaker cable from the cable
guide. Remove the speakers.
Chapter 4.Removing a FRU or CRU 39
Figure 24. Remove the speakers
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Speakers
Remove the system board and the I/O board cable
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the battery pack” on page 31
“Remove the solid-state drive (SSD)” on page 33
“Remove the heat sink” on page 32
“Remove the fans” on page 35
“Remove the I/O bracket (left)” on page 36
Step 1. Detach the antenna cable connectors and disconnect the I/O board cable from the I/O board. Then,
disconnect cables connected to the system board.
40 Hardware Maintenance Manual
Figure 27. Separate the I/O board cable from the system board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
System board
I/O board cable
Use a Golden Key U1 tool to flash-write key id information
After replacing the system board and re-assembling the computer, use a pre-made Golden Key U1 tool to
start the computer and flash-write the serial number (SN), machine type (MT), product name (PN), and UUID
to the new system board.
The Golden Key U1 tool is prepared by running the U1 Update software on a FAT32-formatted USB thumb
drive. Go to http://support.lenovo.com/us/en/solutions/HT506954 for detailed instructions on how to create
and use a Goldern Key U1 tool.
Remove the touchpad with cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the battery pack” on page 31
Step 1. Peel off the pieces of tape.
Figure 28. Peel off the pieces of tape
42 Hardware Maintenance Manual
Step 2. Disconnect the touchpad cable from the system board.
Figure 29. Disconnect the touchpad cable from the system board
Step 3. Remove four screws.
Figure 30. Remove four screws
Screw specifications Number of screws
M2 x L2 4
Step 4. Remove the touchpad with cable.
Figure 31. Remove the touchpad with cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Touchpad with cable
Chapter 4.Removing a FRU or CRU 43
Remove the LCD unit
Make sure the following FRU (CRU) has been removed.
“Remove the lower case” on page 30
Step 1. Disconnect the battery pack cable from the system board.
Attention: Use your fingernails to pull the connector to unplug it. Do not pull the cable.
Step 2. Peel off the pieces of tape.
Figure 32. Peel off the pieces of tape
Step 3. Detach the antenna cable connectors. Then, disconnect the trans board cable and the EDP cable
from the system board.
Figure 33. Detach the antenna cable connectors, disconnect the trans board cable and the EDP cable from the
system board
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Step 4. Rotate the LCD unit to an angle of more than 90 degrees and place the computer on a flat surface
as shown. Remove six screws and then remove the LCD unit.
Figure 34. Remove six screws and remove the LCD unit
Screw specifications Number of screws
M2.5 x L5 6
Remove the upper case (with keyboard)
Make sure the following FRUs (CRUs) have been removed.
“Remove the lower case” on page 30
“Remove the battery pack” on page 31
“Remove the solid-state drive (SSD)” on page 33
“Remove the heat sink” on page 32
“Remove the fans” on page 35
“Remove the I/O bracket (right)” on page 33
“Remove the I/O bracket (left)” on page 36
“Remove the I/O board” on page 37
“Remove the fingerprint board module” on page 38
“Remove the speakers” on page 39
“Remove the touchpad with cable” on page 42
“Remove the system board and the I/O board cable” on page 40
“Remove the LCD unit” on page 44
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Upper case (with keyboard)
Disassemble the LCD unit
The LCD unit as a whole is not an FRU. Instead, it contains FRUs as its components. Before disassembling
the LCD unit, make sure it has been detached from the upper case.
Chapter 4.Removing a FRU or CRU 45
Remove the hinge cover
Make sure the following unit has been removed.
“Remove the LCD unit” on page 44
Step 1. Remove the hinge cover.
Figure 35. Remove the hinge cover
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Hinge cover
Remove the hinge rubbers
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
Step 1. Remove the hinge rubbers.
Figure 36. Remove the hinge rubbers
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Hinge rubbers
46 Hardware Maintenance Manual
Remove the LCD bezel
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
Step 1. Remove four screws.
Figure 37. Remove four screws
Screw specifications Number of screws
M2 x L4 4
Step 2. Remove the LCD bezel.
Figure 38. Remove the LCD bezel
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
LCD bezel
Remove the camera privacy shutter
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
Step 1. Remove the camera privacy shutter.
Chapter 4.Removing a FRU or CRU 47
Figure 39. Remove the camera privacy shutter
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Camera privacy shutter
Remove the hinges
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
Step 1. Remove six screws and then remove the hinges.
Figure 40. Remove six screws and remove the hinges
Screw specifications Number of screws
M2 x L2 6
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Hinges
48 Hardware Maintenance Manual
Remove the LCD panel and the EDP cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
Step 1. Remove the two pieces of removable tape with tweezers and then remove the LCD panel.
Figure 41. Remove the two pieces of removable tape with tweezers and then remove the LCD panel
Step 2. Peel off the tape and then disconnect the EDP cable from the LCD panel.
Figure 42. Peel off the tape and then disconnect the EDP cable from the LCD panel
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
EDP cable
LCD panel
Removable tape
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.
Chapter 4.Removing a FRU or CRU 49
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.
Remove the microphone rubbers
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
“Remove the LCD panel and the EDP cable” on page 49
Step 1. Remove the microphone rubbers.
Figure 43. Remove the microphone rubbers
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Microphone rubbers
Removable tape
Remove the camera
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
50 Hardware Maintenance Manual
“Remove the LCD panel and the EDP cable” on page 49
Step 1. Disconnect the camera cable from the camera board and then remove the camera.
Figure 44. Disconnect the camera cable from the camera board and remove the camera
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Camera
Removable tape
Remove the microphone board with cables
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
“Remove the LCD panel and the EDP cable” on page 49
“Remove the microphone rubbers” on page 50
Step 1. Peel off the tape and then disconnect the camera cable from the trans board. Remove the
microphone board with cables.
Figure 45. Remove the microphone board with cables
Chapter 4.Removing a FRU or CRU 51
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Microphone board with cables
Removable tape
Remove the trans board with cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
“Remove the LCD panel and the EDP cable” on page 49
Step 1. Peel off the tape and then disconnect the camera cable from the trans board.
Figure 46. Peel off the tape and then disconnect the camera cable from the trans board
Step 2. Remove the trans board with cable.
Figure 47. Remove the trans board with cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Trans board with cable
Removable tape
52 Hardware Maintenance Manual
Remove the LCD cover
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 44
“Remove the hinge cover” on page 46
“Remove the hinge rubbers” on page 46
“Remove the LCD bezel” on page 47
“Remove the hinges” on page 48
“Remove the LCD panel and the EDP cable” on page 49
“Remove the microphone rubbers” on page 50
“Remove the camera” on page 50
“Remove the microphone board with cables” on page 51
“Remove the trans board with cable” on page 52
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
LCD cover
Chapter 4.Removing a FRU or CRU 53
54 Hardware Maintenance Manual
Appendix A. Label locations
Figure 48. Label layout on the back side of the base cover
Labels attached to the base cover are country/region specific. Make sure to apply the appropriate labels to
the replacement base cover.
Table 6. All base cover labels
Label Label name Applied country/region Label dimensions
aCountry label Belarus label 40 mm x 8 mm
bVietnam energy label 10 mm x 9 mm
cArgentina CNC label 68 mm x 6 mm
dArgentina label 65 mm x 20 mm
eTW warning label 70 mm x 10 mm
fKCC label 43 mm x 24 mm
gIndonesia postel label 15 mm x 10 mm
hIndonesia rating label 26 mm x 10 mm
IBIS label 18 mm x 18 mm
jWL/BT label US/CA/TW 32 mm x 10 mm
Isarel 32 mm x 10 mm
Brazil 35 mm x 15 mm
South Africa 20 mm x 10 mm
© Copyright Lenovo 2021 55
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All other trademarks are the property of their respective owners. © 2021 Lenovo.
