Contents
About this manual . . . . . . . . . . . . iii
Chapter 1. Important safety
information. . . . . . . . . . . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . . 2
Safety inspection guide . . . . . . . . . . . . . 3
Handling electrostatic discharge-sensitive
devices . . . . . . . . . . . . . . . . . . . 4
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multi-lingual translations) . . . . . . 4
Chapter 2. Important service
information. . . . . . . . . . . . . . . 27
Strategy for replacing FRUs . . . . . . . . . . 27
Strategy for replacing a hard disk drive or a
solid-state drive . . . . . . . . . . . . . 27
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 27
How to use error codes . . . . . . . . . . 28
Strategy for replacing FRUs for CTO, special-bid,
and standard models. . . . . . . . . . . . . 28
Product definition . . . . . . . . . . . . 28
FRU identification . . . . . . . . . . . . 28
Chapter 3. Product overview . . . . . 29
Front . . . . . . . . . . . . . . . . . . . 29
Rear . . . . . . . . . . . . . . . . . . . 31
Chapter 4. Service checkout and
symptom-to-FRU index . . . . . . . . 33
Service checkout . . . . . . . . . . . . . . 33
Problem determination tips . . . . . . . . 33
Symptom-to-FRU index . . . . . . . . . . . 34
Hard disk drive boot error . . . . . . . . . 34
Power supply problems . . . . . . . . . . 35
Beep symptoms . . . . . . . . . . . . . 35
POST error codes . . . . . . . . . . . . 35
Miscellaneous error conditions . . . . . . . 36
Undetermined problems . . . . . . . . . 38
Chapter 5. Troubleshooting,
diagnostics, and recovery . . . . . . . 41
Basic procedure for resolving computer
problems . . . . . . . . . . . . . . . . . 41
Troubleshooting . . . . . . . . . . . . . . 41
Startup problems . . . . . . . . . . . . 42
Screen problems . . . . . . . . . . . . 43
Audio problems . . . . . . . . . . . . . 44
Network problems . . . . . . . . . . . . 44
Performance problems . . . . . . . . . . 47
Storage drive problems . . . . . . . . . . 48
CD or DVD problems . . . . . . . . . . . 48
Serial connector problems . . . . . . . . . 49
USB device problems . . . . . . . . . . 49
Software problems. . . . . . . . . . . . 50
Diagnostics . . . . . . . . . . . . . . . . 50
Lenovo diagnostic tools . . . . . . . . . . 50
Recovery . . . . . . . . . . . . . . . . . 50
Restore system files and settings to an earlier
point . . . . . . . . . . . . . . . . . 50
Restore your files from a backup . . . . . . 50
Reset your computer . . . . . . . . . . . 50
Use advanced options . . . . . . . . . . 51
Windows automatic recovery. . . . . . . . 51
Create and use a recovery USB device . . . . 51
Update the device driver . . . . . . . . . 52
Chapter 6. Hardware removal and
installation . . . . . . . . . . . . . . . 53
Handling static-sensitive devices . . . . . . . . 53
Service tool kit . . . . . . . . . . . . . . . 53
Major FRUs and CRUs . . . . . . . . . . . . 54
System board . . . . . . . . . . . . . . . 59
Removing and installing hardware . . . . . . . 60
External options . . . . . . . . . . . . . 61
Computer stand . . . . . . . . . . . . . 61
Rear cover . . . . . . . . . . . . . . . 65
Optical drive . . . . . . . . . . . . . . 66
Optical drive holder . . . . . . . . . . . 69
System board shield . . . . . . . . . . . 71
VESA mount bracket cover . . . . . . . . 74
VESA mount bracket . . . . . . . . . . . 76
Storage drive and storage drive bracket . . . 78
System fan . . . . . . . . . . . . . . . 83
Heat sink . . . . . . . . . . . . . . . 85
Bump cover . . . . . . . . . . . . . . 88
M.2 solid-state drive . . . . . . . . . . . 90
Microprocessor . . . . . . . . . . . . . 94
Serial connector module . . . . . . . . . 100
Cable cover . . . . . . . . . . . . . . 102
Memory module . . . . . . . . . . . . . 104
Wi-Fi card . . . . . . . . . . . . . . . 107
Coin-cell battery. . . . . . . . . . . . . 110
Cover presence switch (intrusion switch) . . . 113
E-Privacy button board (M90a) . . . . . . . 115
© Copyright Lenovo 2021 i
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