Lenovo ThinkPad R14 Gen 2 Owner's manual

E14 Gen 2/R14 Gen 2/E15 Gen 2
Hardware Maintenance Manual

Note: Before using this information and the product it supports, e sure to read the general information
under Appendix A “Notices” on page 101.
Fifth Edition (October 2021)
© Copyright Lenovo 2020, 2021.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is su ject to restrictions set forth in Contract No. GS-
35F-05925.

Contents
bout 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 a hard disk drive or a
solid-state drive . . . . . . . . . . . . . 21
Important notice for replacing a system
oard . . . . . . . . . . . . . . . . . 22
How to use error message . . . . . . . . . 22
Strategy for replacing FRUs for CTO, special id
model, and standard models. . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 22
Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . . . 25
Checkout guide . . . . . . . . . . . . . . . 26
Diagnosing pro lems . . . . . . . . . . . 26
Quick test programs . . . . . . . . . . . 27
UEFI diagnostic program . . . . . . . . . 27
Boota le diagnostic programs . . . . . . . 27
Power system checkout . . . . . . . . . . . 28
Checking the ac power adapter . . . . . . . 28
Checking the uilt-in attery and operational
charging . . . . . . . . . . . . . . . . 29
Checking the coin-cell attery . . . . . . . 29
Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Reset or restore Windows . . . . . . . . . . . 31
Passwords. . . . . . . . . . . . . . . . . 31
Power-on password . . . . . . . . . . . 31
Hard disk password . . . . . . . . . . . 31
Supervisor password . . . . . . . . . . . 32
How to remove the power-on password . . . 32
How to remove the hard disk password. . . . 33
Power management . . . . . . . . . . . . . 33
Sleep mode . . . . . . . . . . . . . . 33
Hi ernation mode . . . . . . . . . . . . 34
Symptom-to-FRU index . . . . . . . . . . . 34
Numeric error codes . . . . . . . . . . . 35
Error messages . . . . . . . . . . . . . 36
Beep errors. . . . . . . . . . . . . . . 36
No- eep symptoms . . . . . . . . . . . 38
LCD-related symptoms . . . . . . . . . . 38
Intermittent pro lems . . . . . . . . . . . 39
Undetermined pro lems . . . . . . . . . 39
Chapter 5. Special keys . . . . . . . . 41
Chapter 6. Locations . . . . . . . . . 43
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 43
Front . . . . . . . . . . . . . . . . . 43
Base . . . . . . . . . . . . . . . . . 44
Left . . . . . . . . . . . . . . . . . . 45
Right . . . . . . . . . . . . . . . . . 46
Locating FRUs and CRUs . . . . . . . . . . . 46
Major FRUs . . . . . . . . . . . . . . 48
LCD FRUs . . . . . . . . . . . . . . . 50
Miscellaneous parts . . . . . . . . . . . 52
Connector and ca le guide . . . . . . . . 52
Looking up FRU information . . . . . . . . . . 55
Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . . . 57
Service tool kit . . . . . . . . . . . . . . . 57
Screw notices . . . . . . . . . . . . . . . 57
Retaining serial num ers . . . . . . . . . . . 58
Restoring the serial num er of the system
unit . . . . . . . . . . . . . . . . . . 58
Retaining the UUID. . . . . . . . . . . . 59
Chapter 8. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 61
General guidelines. . . . . . . . . . . . . . 61
Before servicing the computer . . . . . . . . . 62
Disa ling the uilt-in attery . . . . . . . . . . 62
1010 Base cover assem ly . . . . . . . . . . 62
1020 Built-in attery . . . . . . . . . . . . . 65
1030 Memory shield and memory module . . . . 66
1040 M.2 solid-state drive . . . . . . . . . . . 67
1050 Speaker assem ly . . . . . . . . . . . 69
1060 Wireless LAN card . . . . . . . . . . . 69
1070 Thermal fan assem ly . . . . . . . . . . 70
1080 I/O card and ca le . . . . . . . . . . . 72
© Copyright Lenovo 2020, 2021 i

1090 Power utton/fingerprint reader module and
ca le . . . . . . . . . . . . . . . . . . . 75
1100 Coin-cell attery . . . . . . . . . . . . 75
1110 Trackpad ca le and trackpad . . . . . . . 76
1120 Ear uds . . . . . . . . . . . . . . . 77
1130 Ear ud ca le and ear ud USB-C oard . . . 77
1140 Ear ud tray . . . . . . . . . . . . . . 78
1150 Ear ud racket . . . . . . . . . . . . . 79
1160 Ear ud tray front ezel . . . . . . . . . . 79
1170 LCD unit . . . . . . . . . . . . . . . 80
1180 System oard . . . . . . . . . . . . . 83
1190 Key oard assem ly . . . . . . . . . . . 86
2010 LCD ezel assem ly . . . . . . . . . . . 86
2020 LCD panel. . . . . . . . . . . . . . . 87
2030 Hinge kit . . . . . . . . . . . . . . . 91
2040 Integrated camera and microphone com o
card . . . . . . . . . . . . . . . . . . . 92
2050 eDP ca le assem ly . . . . . . . . . . . 94
2060 Wireless LAN antennas assem ly . . . . . 96
2070 LCD cover assem ly. . . . . . . . . . . 99
ppendix . Notices . . . . . . . . . . 101
ppendix B. bbreviation and
acronym table . . . . . . . . . . . . . 103
ii E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

bout this manual
This manual contains service and reference information for the following ThinkPad® products.
ThinkPad E14 Gen 2 Machine types (MT) 20TA, 20TB, 20T6 and 20T7
ThinkPad E15 Gen 2 Machine types (MT) 20TD, 20TE, 20T8 and 20T9
ThinkPad R14 Gen 2 Machine types (MT) 20TC
Use this manual along with the advanced diagnostic tests to trou leshoot pro lems.
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 trou leshoot pro lems effectively.
Before servicing a ThinkPad product, e 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, 2021 iii

iv E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

Chapter 1. Safety information
This chapter presents following safety information that you need to e familiar with efore you service a
ThinkPad note ook 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:
• O serve good housekeeping in the area of the machines during and after maintenance.
• When lifting any heavy o ject:
1. Make sure that you can stand safely without slipping.
2. Distri ute the weight of the o ject equally etween your feet.
3. Use a slow lifting force. Never move suddenly or twist when you attempt to lift.
4. Lift y standing or y pushing up with your leg muscles; this action removes the strain from the
muscles in your ack. 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 e trapped in the moving parts of a machine. Make sure that your
sleeves are fastened or rolled up a ove your el ows. If your hair is long, fasten it.
• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, a out 8
centimeters (3 inches) from the end.
• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.
ttention: Metal o jects 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 e hazardous to your eyes.
• After service, reinstall all safety shields, guards, la els, and ground wires. Replace any safety device that
is worn or defective.
• Reinstall all covers correctly efore returning the machine to the customer.
• Fan louvers on the machine help to prevent overheating of internal components. Do not o struct fan
louvers or cover them with la els or stickers.
Electrical safety
O serve 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, ru er floor mats that contain small conductive fi ers to decrease electrostatic discharges.
Do not use this type of mat to protect yourself from electrical shock.
© Copyright Lenovo 2020, 2021 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 efore:
– 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 ox that supplies power to the machine, and to lock the wall ox in the off position.
• If you need to work on a machine that has e posed electrical circuits, o serve the following precautions:
– Ensure that another person, familiar with the power-off controls, is near you.
ttention: Another person must e 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 ehind your ack.
ttention: An electrical shock can occur only when there is a complete circuit. By o serving the a ove
rule, you may prevent a current from passing through your ody.
– When using testers, set the controls correctly and use the approved pro e leads and accessories for
that tester.
– Stand on suita le ru er mats (o tained locally, if necessary) to insulate you from grounds such as
metal floor strips and machine frames.
O serve 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 roken tools and testers.
• Never assume that power has een disconnected from a circuit. First, check that it has een powered off.
• Always look carefully for possi le hazards in your work area. Examples of these hazards are moist floors,
ungrounded power extension ca les, 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
– Parts similar to those listed a ove
This practice ensures correct grounding of the units.
• If an electrical accident occurs:
– Use caution; do not ecome 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 uilt, 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 y this
inspection guide.
If any unsafe conditions are present, you must determine how serious the apparent hazard could e and
whether you can continue without first correcting the pro lem.
2E14 Gen 2/R14 Gen 2/E15 Gen 2 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 ulging capacitor
• Mechanical hazards, such as loose or missing hardware
To determine whether there are any potentially unsafe conditions, use the following checklist at the
eginning of every service task. Begin the checks with the power off, and the power cord disconnected.
Checklist:
1. Check exterior covers for damage (loose, roken, 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 etween the external ground pin and the frame ground.
. The power cord should e the authorized type specified for your computer. Go to: https://
www.lenovo.com/serviceparts-lookup
c. Insulation must not e frayed or worn.
4. Check for cracked or ulging atteries.
5. Remove the cover.
6. Check for any o vious non-ThinkPad alterations. Use good judgment as to the safety of any non-
ThinkPad alterations.
7. Check inside the unit for any o vious 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 ca les.
9. Check that the power-supply cover fasteners (screws or rivets) have not een removed or tampered
with.
Handling devices that are sensitive to electrostatic discharge
Any computer part containing transistors or integrated circuits (ICs) should e considered sensitive to
electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge etween o jects.
Protect against ESD damage y 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 een 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 ody.
• 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 elow, to provide protection that meets the specific
service requirement.
Note: The use of a grounding system to guard against ESD damage is desira le ut not necessary.
– Attach the ESD ground clip to any frame ground, ground raid, or green-wire ground.
Chapter 1.Safety information 3

– When working on a dou le-insulated or attery-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 e verified y a certified electrician.
Safety notices (multilingual translations)
The safety notices in this section are provided in the following languages:
• English
• Ara ic
• Brazilian Portuguese
• French
• German
• He rew
• Japanese
• Korean
• Spanish
• Traditional Chinese
D NGER
D NGER
D NGER
4E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

D NGER
D NGER
D NGER
D NGER
D NGER
Chapter 1.Safety information 5

6E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

PERIGO
PERIGO
Chapter 1.Safety information 7

PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
8E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

PERIGO
D NGER
D NGER
D NGER
D NGER
Chapter 1.Safety information 9

D NGER
D NGER
D NGER
D NGER
VORSICHT
10 E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

VORSICHT
VORSICHT
VORSICHT
VORSICHT
Chapter 1.Safety information 11

VORSICHT
VORSICHT
VORSICHT
12 E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual

Chapter 1.Safety information 13

14 E14 Gen 2/R14 Gen 2/E15 Gen 2 Hardware Maintenance Manual