
Contents
About this m nu l . . . . . . . . . . . . iii
Ch pter 1. S fety inform tion . . . . . . 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
Ch pter 2. Import nt service
inform tion . . . . . . . . . . . . . . . 21
Strategy for replacing FRUs . . . . . . . . . . 21
Strategy for replacing an M.2 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,
and standard models. . . . . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 22
Ch pter 3. Gener l 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 attery and operational
charging . . . . . . . . . . . . . . . . 29
Checking the coin-cell attery . . . . . . . 29
Ch pter 4. Rel ted service
inform tion . . . . . . . . . . . . . . . 31
Reset or restore Windows . . . . . . . . . . . 31
Passwords. . . . . . . . . . . . . . . . . 31
Power-on password . . . . . . . . . . . 31
Nvme password . . . . . . . . . . . . . 31
Supervisor password . . . . . . . . . . . 32
System management password. . . . . . . 32
How to remove the power-on password . . . 32
How to remove the Nvme password . . . . . 33
How to remove the system management
password . . . . . . . . . . . . . . . 33
Power management . . . . . . . . . . . . . 34
Sleep mode . . . . . . . . . . . . . . 34
Hi ernation mode . . . . . . . . . . . . 35
Symptom-to-FRU index . . . . . . . . . . . 35
Numeric error codes . . . . . . . . . . . 36
Error messages . . . . . . . . . . . . . 37
Beep errors. . . . . . . . . . . . . . . 37
LCD-related symptoms . . . . . . . . . . 39
Intermittent pro lems . . . . . . . . . . . 40
Undetermined pro lems . . . . . . . . . 40
Ch pter 5. Use the keybo rd
shortcuts . . . . . . . . . . . . . . . . 41
Ch pter 6. Loc tions . . . . . . . . . 43
Computer controls, connectors, and indicators . . 43
Front view . . . . . . . . . . . . . . . 43
Side view . . . . . . . . . . . . . . . 45
Bottom view . . . . . . . . . . . . . . 46
Locating FRUs and CRUs . . . . . . . . . . . 46
Major FRUs . . . . . . . . . . . . . . 48
Miscellaneous parts and other FRUs . . . . . 50
Connector and ca le guide . . . . . . . . 50
Looking up FRU information . . . . . . . . . . 54
Ch pter 7. FRU repl cement
notices . . . . . . . . . . . . . . . . . 55
Service tool kit . . . . . . . . . . . . . . . 55
Screw notices . . . . . . . . . . . . . . . 55
Retaining serial num ers . . . . . . . . . . . 56
Restoring the serial num er of the system
unit . . . . . . . . . . . . . . . . . . 56
Retaining the UUID. . . . . . . . . . . . 57
Reading or writing the ECA information . . . . 58
Ch pter 8. Removing or repl cing
FRU. . . . . . . . . . . . . . . . . . . 59
General guidelines. . . . . . . . . . . . . . 59
Before servicing the computer . . . . . . . . . 60
Disa ling the uilt-in attery . . . . . . . . 60
Removing the SD card . . . . . . . . . . 60
Removing a major FRU . . . . . . . . . . . . 60
1010 Base cover assem ly . . . . . . . . 61
1020 Nano-SIM-card tray (for selected
models) . . . . . . . . . . . . . . . . 62
1030 Wireless WAN card (for selected
models) . . . . . . . . . . . . . . . . 62
1040 Memory module . . . . . . . . . . 64
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