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
- Removal procedure
- Remove the Lenovo Smart Pen
- Remove the lower case
- Remove the battery pack
- Remove the solid-state drive (SSD)
- Remove the Wi-Fi card
- Remove the heat sink
- Remove the fan
- Remove the memory module
- Remove the I/O bracket (left)
- Remove the I/O board bracket (right)
- Remove the CMOS battery
- Remove the Lenovo Smart Pen holder
- Remove the I/O board with cable
- Remove the speakers
- Remove the Lenovo Smart Pen charger cable
- Remove the fingerprint board
- Remove the system board
- Remove the LCD unit
- Remove the upper case (with keyboard and touchpad)
- Disassemble the LCD unit
- Appendix A. Label locations
- Trademarks
Lenovo 14s Yoga User Manual
Displayed below is the user manual for 14s Yoga by Lenovo which is a product in the Notebooks category. This manual has pages.
Related Manuals
Hardware Maintenance Manual
Lenovo ThinkBook 14s Yoga
First Edition (October 2020)
© Copyright Lenovo 2020.
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 . . . . . . . . . . . . . . . . . . 27
Service tools . . . . . . . . . . . . . . . . 27
General guidelines. . . . . . . . . . . . . . 27
Removal procedure . . . . . . . . . . . . . 28
Remove the Lenovo Smart Pen . . . . . . . 28
Remove the lower case . . . . . . . . . . 28
Remove the battery pack . . . . . . . . . 29
Remove the solid-state drive (SSD) . . . . . 30
Remove the Wi-Fi card . . . . . . . . . . 32
Remove the heat sink. . . . . . . . . . . 33
Remove the fan . . . . . . . . . . . . . 33
Remove the memory module . . . . . . . . 34
Remove the I/O bracket (left) . . . . . . . . 35
Remove the I/O board bracket (right) . . . . . 36
Remove the CMOS battery . . . . . . . . 37
Remove the Lenovo Smart Pen holder . . . . 38
Remove the I/O board with cable . . . . . . 39
Remove the speakers. . . . . . . . . . . 39
Remove the Lenovo Smart Pen charger
cable . . . . . . . . . . . . . . . . . 40
Remove the fingerprint board. . . . . . . . 41
Remove the system board . . . . . . . . . 41
Remove the LCD unit . . . . . . . . . . . 43
Remove the upper case (with keyboard and
touchpad) . . . . . . . . . . . . . . . 44
Disassemble the LCD unit . . . . . . . . . 45
Appendix A. Label locations. . . . . . 53
Trademarks . . . . . . . . . . . . . . . . . lv
© Copyright Lenovo 2020 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 14s Yoga ITL 20WE
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 2020 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 2020 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
10 Hardware Maintenance Manual
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 2020 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 14s Yoga ITL (MT: 20WE)
CRU Type
ac power adapter self-service
Power cord self-service
Lenovo Smart Pen self-service
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.
Figure 1. ThinkBook 14s Yoga ITL exploded view
Table 2. FRU (CRU) categories
No. FRU (CRU) category
1Upper case (with keyboard and touchpad)
© Copyright Lenovo 2020 23
Table 2. FRU (CRU) categories (continued)
2Fingerprint board
3I/O board with cable
4I/O bracket (right)
5CMOS battery
6Lenovo Smart Pen charger cable
7Lenovo Smart Pen holder
8Lenovo Smart Pen
9Solid-state drive (SSD) bracket
Note: The SSD bracket is used to lock the screw for the 2242 SSD.
10 Solid-state drive (SSD)
11 Mylar
12 Wi-Fi card
13 Lower case
14 Speakers
15 Battery pack
16 Fan
17 Heat sink
18 Memory module shielding
19 Memory module
20 System board
21 I/O bracket (left)
aPower cord
bac power adapter
cScrew kit
dLabel
24 Hardware Maintenance Manual
Table 3. FRU categories for the LCD unit (continued)
7LCD cover
8Rubber hinges
9Hinges
10 EDP cable
11 Sensor board with cable
26 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 4. 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 2020 27
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).
Removal procedure
Remove the Lenovo Smart Pen
Step 1. Remove the Lenovo Smart Pen.
Figure 3. Remove the Lenovo Smart Pen
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Lenovo Smart Pen
Remove the lower case
Make sure the computer has been shut down before servicing the computer and the following FRUs (or
CRUs) have been removed.
28 Hardware Maintenance Manual
“Remove the Lenovo Smart Pen” on page 28
Step 1. Place the computer upside down on a flat surface.
Step 2. Loosen six screws and then remove four screws.
Figure 4. Loosen six screws and then remove four screws
Screw specifications Number of screws
M2.0 x L3.5+4.5 4
Step 3. Pry up the latches and then remove the lower case.
Figure 5. Pry up the latches and then 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 FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
Chapter 4.Removing a FRU or CRU 29
“Remove the lower case” on page 28
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 three screws and then remove the battery pack.
Figure 6. Remove three screws and then remove the battery pack
Screw specifications Number of screws
M2 x L4.0 3
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Battery pack
Remove the solid-state drive (SSD)
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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.
30 Hardware Maintenance Manual
Figure 7. Remove one screw
Screw specifications Number of screws
M2.0 x L2.0 1
Step 3. Remove the SSD module.
Figure 8. Remove the SSD module
Step 4. Remove one screw and then separate the SSD from the SSD bracket.
Figure 9. Remove one screw and separate the SSD from the SSD bracket
Screw specifications Number of screws
M2.0 x L2.0 1
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
SSD
SSD bracket
Chapter 4.Removing a FRU or CRU 31
Remove the Wi-Fi card
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 mylar.
Figure 10. Peel off the mylar
Step 3. Detach the main and auxiliary antenna cable connectors. Remove one screw and then remove the
Wi-Fi card by pulling it away from the slot.
Figure 11. Remove one screw and then remove the Wi-Fi card by pulling it away from the slot
Screw specifications Number of screws
M1.98 x L3.0 1
32 Hardware Maintenance Manual
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Wi-Fi card
Mylar
Remove the heat sink
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 three screws and then remove the heat sink.
Figure 12. Remove three screws and then remove the heat sink
Screw specifications Number of screws
M2 x L2.0 3
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Heat sink
Remove the fan
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 fan cable from the system board. Remove two screws and then remove the fan.
Chapter 4.Removing a FRU or CRU 33
Figure 13. Remove two screws and then remove the fan
Screw specifications Number of screws
M2 x L4.0 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Fan
Remove the memory module
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 the memory module shielding.
Figure 14. Remove the memory module shielding
Step 3. Release the two latches on both edges of the socket at the same time. Then, remove the memory
module.
34 Hardware Maintenance Manual
Figure 15. Remove the memory module
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Memory module
Memory module shielding
Remove the I/O bracket (left)
Make sure the following FRUs (or CRUs) has been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 two screws and then open the hinge.
Figure 16. Remove two screws and then open the hinge
Screw specifications Number of screws
M2.5 x L5.5 2
Chapter 4.Removing a FRU or CRU 35
Step 3. Remove four screws and then remove the left I/O bracket.
Figure 17. Remove four screws and then remove the left I/O bracket
Screw specifications Number of screws
M2 x L4.0 4
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 bracket (right)
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 two screws and then open the hinge.
Figure 18. Remove two screws and then open the hinge
36 Hardware Maintenance Manual
Screw specifications Number of screws
M2.5 x L5.5 2
Step 3. Remove one screw and then remove the right I/O bracket.
Figure 19. Remove one screw and then remove the right I/O bracket
Screw specifications Number of screws
M2 x L4.0 1
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 CMOS battery
Make sure the following FRUs (or CRUs) has been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 CMOS battery cable from the I/O board and then remove the CMOS battery.
Chapter 4.Removing a FRU or CRU 37
Figure 20. Disconnect the CMOS battery cable from the I/O board and then remove the CMOS battery
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
CMOS battery
Remove the Lenovo Smart Pen holder
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
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 two screws and then remove the Lenovo Smart Pen holder.
Figure 21. Remove two screws and then remove the Lenovo Smart Pen holder
Screw specifications Number of screws
M1.6 x L3.0 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
38 Hardware Maintenance Manual
Lenovo Smart Pen holder
Remove the I/O board with cable
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
“Remove the fan” on page 33
“Remove the Lenovo Smart Pen holder” on page 38
“Remove the CMOS battery” on page 37
“Remove the I/O board bracket (right)” on page 36
Step 1. Disconnect the pen holder cable and the fingerprint board cable from the I/O board, and
disconnect the I/O board cable from the system board. Then, remove the I/O board with cable.
Figure 22. Disconnect the pen holder cable and the fingerprint board cable from the I/O board, and disconnect
the I/O board cable from the system board. Then, remove the I/O board with cable.
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
I/O board with cable
Remove the speakers
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
Step 1. Disconnect the speaker cable from the system board and release the speaker cable from the cable
guide. Remove the speakers carefully.
Chapter 4.Removing a FRU or CRU 39
Figure 23. Disconnect the speaker cable from the system board and release the speaker cable from the cable
guide. Remove the speakers carefully.
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Speakers
Remove the Lenovo Smart Pen charger cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
“Remove the fan” on page 33
“Remove the I/O board bracket (right)” on page 36
“Remove the CMOS battery” on page 37
“Remove the Lenovo Smart Pen holder” on page 38
“Remove the I/O board with cable” on page 39
Step 1. Peel off the tape and then remove the Lenovo Smart Pen charger cable.
Figure 24. Peel off the tape and then remove the Lenovo Smart Pen charger cable
40 Hardware Maintenance Manual
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Lenovo Smart Pen charger cable
Remove the fingerprint board
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
“Remove the fan” on page 33
“Remove the I/O board bracket (right)” on page 36
“Remove the CMOS battery” on page 37
“Remove the I/O board with cable” on page 39
“Remove the Lenovo Smart Pen holder” on page 38
Step 1. Remove two screws and then remove the fingerprint board.
Figure 25. Remove two screws and then remove the fingerprint board
Screw specifications Number of screws
M1.6 x L3.0 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
fingerprint board
Remove the system board
Make sure the following FRUs (or CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
“Remove the solid-state drive (SSD)” on page 30
“Remove the Wi-Fi card” on page 32
Chapter 4.Removing a FRU or CRU 41
“Remove the heat sink” on page 33
“Remove the fan” on page 33
“Remove the memory module” on page 34
“Remove the I/O bracket (left)” on page 35
Step 1. Peel off the tapes.
Figure 26. Peel off the tapes
Step 2. Disconnect cables connected to the system board.
Figure 27. Disconnect cables connected to the system board
Step 3. Remove one screw and then remove the system board.
42 Hardware Maintenance Manual
Figure 28. Remove one screw and then remove the system board
Screw specifications Number of screws
M1.98 x L3.0 1
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
System board
Remove the LCD unit
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the heat sink” on page 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 mylar and tapes.
Figure 29. Peel off the mylar and tapes
Chapter 4.Removing a FRU or CRU 43
Step 3. Detach the antenna cable connectors and then disconnect the EDP cable form the system board.
Figure 30. Detach the antenna cable connectors and then disconnect the EDP cable form the system board
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 four screws and then remove the LCD unit.
Figure 31. Remove four screws and then remove the LCD unit
Screw specifications Number of screws
M2.5 x L5.5 4
Remove the upper case (with keyboard and touchpad)
Make sure the following FRUs (CRUs) have been removed.
“Remove the Lenovo Smart Pen” on page 28
“Remove the lower case” on page 28
“Remove the battery pack” on page 29
“Remove the solid-state drive (SSD)” on page 30
“Remove the Wi-Fi card” on page 32
“Remove the heat sink” on page 33
44 Hardware Maintenance Manual
“Remove the fan” on page 33
“Remove the memory module” on page 34
“Remove the I/O bracket (left)” on page 35
“Remove the I/O board bracket (right)” on page 36
“Remove the CMOS battery” on page 37
“Remove the Lenovo Smart Pen holder” on page 38
“Remove the I/O board with cable” on page 39
“Remove the speakers” on page 39
“Remove the Lenovo Smart Pen charger cable” on page 40
“Remove the fingerprint board” on page 41
“Remove the system board” on page 41
“Remove the LCD unit” on page 43
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Upper case (with keyboard and touchpad)
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.
Remove the strip cover
Make sure the following unit has been removed.
“Remove the LCD unit” on page 43
Step 1. Remove the strip cover.
Figure 32. Remove the strip cover
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
strip cover
Remove the rubber hinges
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
Chapter 4.Removing a FRU or CRU 45
“Remove the strip cover” on page 45
Step 1. Remove the rubber hinges.
Figure 33. Remove the rubber hinges
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Rubber hinges
Remove the LCD module
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
Step 1. Remove the two screws and then remove the two pieces of removable tape with tweezers. Then,
turn over the LCD module.
Figure 34. Remove the two screws and then remove the two pieces of removable tape with tweezers. Then,
turn over the LCD module
46 Hardware Maintenance Manual
Screw specifications Number of screws
M1.6 x L1.5 2
Step 2. Peel off the tape carefully and then disconnect the EDP cable from the LCD module.
Figure 35. Peel off the tape carefully and then disconnect the EDP cable from the LCD module
Step 3. Disconnect the touch cable, and then remove the LCD module.
Figure 36. Disconnect the touch cable, and then remove the LCD module
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
LCD module
Chapter 4.Removing a FRU or CRU 47
Removable tape
Remove the EDP cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
“Remove the rubber hinges” on page 45
“Remove the LCD module” on page 46
Step 1. Disconnect the EDP cable from the sensor board and then remove the EDP cable.
Figure 37. Disconnect the EDP cable from the sensor board and then remove the EDP cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
EDP cable
Remove the microphone rubbers
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
“Remove the LCD module” on page 46
Step 1. Remove the microphone rubbers.
Figure 38. Remove the microphone rubbers
48 Hardware Maintenance Manual
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Microphone rubbers
Remove the camera shutter
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
“Remove the LCD module” on page 46
Step 1. Remove the camera shutter.
Figure 39. Remove the camera shutter
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Camera shutter
Remove the camera
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
“Remove the LCD module” on page 46
“Remove the microphone rubbers” on page 48
Step 1. Disconnect the camera cable from the camera board and then remove the camera.
Chapter 4.Removing a FRU or CRU 49
Figure 40. Disconnect the camera cable from the camera board and then remove the camera
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Camera
Remove the sensor board with cable
Make sure the following FRUs (CRUs) have been removed.
“Remove the LCD unit” on page 43
“Remove the strip cover” on page 45
“Remove the LCD module” on page 46
Step 1. Disconnect the EDP cable from the sensor board and disconnect the sensor board cable from the
camera. Then, remove the sensor board with cable.
Figure 41. Disconnect the EDP cable from the LCD module and then remove the EDP cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Sensor board with cable
Remove the hinges
Make sure the following FRUs (CRUs) have been removed.
“Remove the strip cover” on page 45
“Remove the rubber hinges” on page 45
“Remove the LCD module” on page 46
50 Hardware Maintenance Manual
Step 1. Remove six screws and then remove the hinges.
Figure 42. Remove six screws and then remove the hinges
Screw specifications Number of screws
M2 x L2.0 6
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Hinges
Remove the LCD cover
Make sure the following FRUs (CRUs) have been removed.
“Remove the strip cover” on page 45
“Remove the rubber hinges” on page 45
“Remove the LCD module” on page 46
“Remove the EDP cable” on page 48
“Remove the microphone rubbers” on page 48
“Remove the camera shutter” on page 49
“Remove the camera” on page 49
“Remove the sensor board with cable” on page 50
“Remove the hinges” on page 50
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 51
52 Hardware Maintenance Manual
Appendix A. Label locations
Figure 43. 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 5. All base cover labels
Label Label name Applied country/region Label dimensions
aQR Label 26.1 mm x 17 mm
bGML Label 22.501 mm x 16.077 mm
cAdapter Label 65 mm x 20 mm
dWL/BT label Brazil 35 mm x 15 mm
Israel/US/CA/TW 32 mm x 10 mm
South Africa 20 mm x 10 mm
Malaysia/Indonesia 15 mm x 10 mm
eCountry label Argentina label 68 mm x 6 mm
fTW label 70 mm x 10 mm
gIndonesia rating label 26 mm x 10 mm
hIndia BIS label 22 mm x 30 mm
IKR KCC label 50 mm x 43 mm
jJapan 35 mm x 10 mm
© Copyright Lenovo 2020 53
Table 5. All base cover labels (continued)
kVietnam Energy Label 10 mm x 9 mm
54 Hardware Maintenance Manual
Trademarks
LENOVO and the LENOVO logo are trademarks of Lenovo.
All other trademarks are the property of their respective owners. © 2020 Lenovo.
