Lenovo ThinkPad X1 Carbon 20HQ, Hardware Maintenance Manual

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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 . . . . . . . . . . . . . .
19
Strategy for replacing FRUs . . . . . . . . . 19
Strategy for replacing an M.2 solid-state
drive . . . . . . . . . . . . . . . . .
19
Important notice for replacing a system
board . . . . . . . . . . . . . . . .
20
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 . . . . . 23
What to do first . . . . . . . . . . . . . . 23
Checkout guide . . . . . . . . . . . . . . 24
Diagnosing problems . . . . . . . . . . 24
Quick test programs. . . . . . . . . . . 25
UEFI diagnostic program . . . . . . . . . 25
Bootable diagnostic programs. . . . . . . 26
Power system checkout . . . . . . . . . . . 26
Checking the ac power adapter . . . . . . 27
Checking the battery and operational
charging . . . . . . . . . . . . . . .
27
Checking the coin-cell battery . . . . . . . 28
Chapter 4. Related service
information . . . . . . . . . . . . . .
29
Recovery information . . . . . . . . . . . . 29
Restoring the factory contents with the
Recovery Disc Set for the Windows 7
operating system . . . . . . . . . . . .
29
Recovery information for the Windows 7
operating system . . . . . . . . . . . .
30
Recovery information for the Windows 10
operating system . . . . . . . . . . . .
32
Passwords . . . . . . . . . . . . . . . . 33
Power-on password . . . . . . . . . . . 34
Hard disk password . . . . . . . . . . . 34
Supervisor password . . . . . . . . . . 34
How to remove the power-on password . . . 34
How to remove the hard disk password . . . 35
Power management . . . . . . . . . . . . 35
Screen blank mode (for the Windows 7
operating system only) . . . . . . . . . .
35
Sleep mode . . . . . . . . . . . . . . 36
Hibernation mode . . . . . . . . . . . 36
Symptom-to-FRU index . . . . . . . . . . . 37
Numeric error codes . . . . . . . . . . 37
Error messages . . . . . . . . . . . . 38
Beep errors . . . . . . . . . . . . . . 38
LCD-related symptoms . . . . . . . . . 40
Intermittent problems . . . . . . . . . . 40
Undetermined problems . . . . . . . . . 40
Chapter 5. Special keys . . . . . . . . 43
Chapter 6. Locations . . . . . . . . . 45
Computer controls, connectors, and indicators . . 45
Front view. . . . . . . . . . . . . . . 45
Left-side view . . . . . . . . . . . . . 46
Right-side view. . . . . . . . . . . . . 46
Rear view . . . . . . . . . . . . . . . 46
Bottom view . . . . . . . . . . . . . . 47
Status indicators . . . . . . . . . . . . 47
Locating FRUs and CRUs . . . . . . . . . . 49
Major FRUs . . . . . . . . . . . . . . 50
LCD FRUs . . . . . . . . . . . . . . 53
Miscellaneous parts and other FRUs . . . . 55
Connector and cable guide . . . . . . . . 55
Looking up FRU information . . . . . . . . . 61
Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . .
63
Common service tools . . . . . . . . . . . 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
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