Lenovo ThinkPad L14 Gen 5 Bruksanvisning
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ThinkPad L14 Gen 5 and ThinkPad L16 Gen 1
Hardware Maintenance Manual
First Edition (March 2024)
© Copyright Lenovo 2024.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.
Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 3
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. Important service
information . . . . . . . . . . . . . . . 19
Strategy for replacing FRUs . . . . . . . . . . 19
Strategy for replacing a solid-state drive . . . 19
How to use error message . . . . . . . . . 20
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 20
Product definition . . . . . . . . . . . . 20
FRU identification . . . . . . . . . . . . 20
Chapter 3. General checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
Checkout guide . . . . . . . . . . . . . . . 22
Diagnosing problems . . . . . . . . . . . 22
Quick test programs . . . . . . . . . . . 23
UEFI diagnostic program . . . . . . . . . 23
Bootable diagnostic programs . . . . . . . 24
Power system checkout . . . . . . . . . . . 24
Checking the ac power adapter . . . . . . . 25
Checking the built-in battery and operational
charging . . . . . . . . . . . . . . . . 25
Checking the coin-cell battery . . . . . . . 26
Chapter 4. Related service
information . . . . . . . . . . . . . . . 27
Reset or restore Windows . . . . . . . . . . . 27
Use Lenovo recovery options. . . . . . . . 27
Use Window recovery options . . . . . . . 27
Passwords. . . . . . . . . . . . . . . . . 27
Power-on password . . . . . . . . . . . 28
NVMe passwords . . . . . . . . . . . . 28
Supervisor password . . . . . . . . . . . 28
System management password. . . . . . . 28
How to remove the power-on password . . . 29
How to remove the NVMe password . . . . . 29
How to remove the system management
password . . . . . . . . . . . . . . . 30
Power management . . . . . . . . . . . . . 30
Sleep mode . . . . . . . . . . . . . . 30
Hibernation mode . . . . . . . . . . . . 31
Symptom-to-FRU index . . . . . . . . . . . 31
Numeric error codes . . . . . . . . . . . 32
Error messages . . . . . . . . . . . . . 33
Battery-charge LED indicator diagnosis . . . 33
No-beep symptoms . . . . . . . . . . . 35
LCD-related symptoms . . . . . . . . . . 36
Intermittent problems . . . . . . . . . . . 37
Undetermined problems . . . . . . . . . 37
Chapter 5. Special keys . . . . . . . . 39
Chapter 6. Locations . . . . . . . . . 41
Locating computer controls and connectors . . . 41
Front view . . . . . . . . . . . . . . . 41
Side view . . . . . . . . . . . . . . . 44
Rear view . . . . . . . . . . . . . . . 46
Bottom view . . . . . . . . . . . . . . 47
Locating FRUs and CRUs . . . . . . . . . . . 49
Major FRUs and CRUs . . . . . . . . . . 50
LCD FRUs and CRUs . . . . . . . . . . . 55
Miscellaneous parts . . . . . . . . . . . 57
Connector and cable guide . . . . . . . . 58
Looking up FRU information . . . . . . . . . . 61
Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . . . 63
Service tool kit . . . . . . . . . . . . . . . 63
Screw notices . . . . . . . . . . . . . . . 63
Retaining serial numbers . . . . . . . . . . . 64
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 64
Retaining the UUID. . . . . . . . . . . . 65
Reading or writing the ECA information . . . . 66
Chapter 8. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 67
General guidelines. . . . . . . . . . . . . . 67
Before servicing the computer . . . . . . . . . 67
Disable Fast Startup and the built-in battery . . 67
Removing the nano-SIM card and nano-SIM-
card tray . . . . . . . . . . . . . . . . 68
Keyboard . . . . . . . . . . . . . . . . . 68
Remove the keyboard . . . . . . . . . . 68
Install the keyboard . . . . . . . . . . . 70
Base cover assembly . . . . . . . . . . . . 72
© Copyright Lenovo 2024 i
Produktspecifikationer
| Varumärke: | Lenovo |
| Kategori: | Laptop |
| Modell: | ThinkPad L14 Gen 5 |
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