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Hardware Maintenance Manual
Machine Types: 20LD, 20LE, 20LF, and 20LG
Note: Before using this information and the product it supports, be sure to read the general information
under Appendix A “Notices” on page 97.
Second Edition (October 2019)
© Copyright Lenovo 2019.
LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-
35F-05925.
Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge . . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. Important service
information . . . . . . . . . . . . . . . 21
Strategy for replacing FRUs . . . . . . . . . . 21
Strategy for replacing an M.2 solid-state
drive . . . . . . . . . . . . . . . . . 21
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 22
How to use error message . . . . . . . . . 22
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 23
Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . . . 25
Checkout guide . . . . . . . . . . . . . . . 26
Lenovo Companion . . . . . . . . . . . 26
Quick test programs . . . . . . . . . . . 26
UEFI diagnostic program . . . . . . . . . 27
Bootable diagnostic programs . . . . . . . 27
Power system checkout . . . . . . . . . . . 28
Checking the ac power adapter . . . . . . . 28
Checking the battery and operational
charging . . . . . . . . . . . . . . . . 28
Checking the coin-cell battery . . . . . . . 29
Chapter 4. Related service
information . . . . . . . . . . . . . . . 31
Recovery information . . . . . . . . . . . . 31
Resetting your computer . . . . . . . . . 31
Using advanced startup options . . . . . . 31
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 31
Creating and using a recovery USB drive . . . 32
Passwords. . . . . . . . . . . . . . . . . 33
Power-on password . . . . . . . . . . . 33
Hard disk password . . . . . . . . . . . 33
Supervisor password . . . . . . . . . . . 33
How to remove the power-on password . . . 34
How to remove the hard disk password. . . . 34
Power management . . . . . . . . . . . . . 35
Sleep mode . . . . . . . . . . . . . . 35
Hibernation mode . . . . . . . . . . . . 35
Symptom-to-FRU index . . . . . . . . . . . 36
Numeric error codes . . . . . . . . . . . 36
Error messages . . . . . . . . . . . . . 38
Beep symptoms . . . . . . . . . . . . . 38
No-beep symptoms . . . . . . . . . . . 40
LCD-related symptoms . . . . . . . . . . 40
Intermittent problems . . . . . . . . . . . 40
Undetermined problems . . . . . . . . . 41
Chapter 5. YOGA Modes . . . . . . . 43
Chapter 6. Special keys . . . . . . . . 45
Chapter 7. Locations . . . . . . . . . 47
Locating computer controls, connectors, and
indicators . . . . . . . . . . . . . . . . . 47
Front view . . . . . . . . . . . . . . . 47
Left-side view . . . . . . . . . . . . . . 48
Right-side view . . . . . . . . . . . . . 48
Rear view . . . . . . . . . . . . . . . 48
Bottom view . . . . . . . . . . . . . . 49
Status indicators . . . . . . . . . . . . 49
Locating FRUs and CRUs . . . . . . . . . . . 51
Major FRUs . . . . . . . . . . . . . . 52
LCD FRUs for models with conventional
camera . . . . . . . . . . . . . . . . 54
LCD FRUs for models with infrared camera . . 56
Miscellaneous parts and other FRUs . . . . . 57
Connector and cable guide . . . . . . . . 58
Looking up FRU information . . . . . . . . . . 60
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . . 61
Common service tools . . . . . . . . . . . . 61
Screw notices . . . . . . . . . . . . . . . 61
Sensor calibration . . . . . . . . . . . . . . 62
Retaining serial numbers . . . . . . . . . . . 63
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 63
Retaining the UUID. . . . . . . . . . . . 64
Reading or writing the ECA information . . . . 64
© Copyright Lenovo 2019 i
Produktspecifikationer
| Varumärke: | Lenovo |
| Kategori: | Laptop |
| Modell: | Thinkpad X1 Yoga G3 |
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