Lenovo ThinkPad X390, Hardware Maintenance Manual, Page: 3 / 108

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 a storage drive . . . . 21
Important notice for replacing a system
board . . . . . . . . . . . . . . . . . 22
How to use error message . . . . . . . . . 22
Strategy for replacing FRUs for CTO, special bid
model, and standard models. . . . . . . . . . 22
Product definition . . . . . . . . . . . . 22
FRU identification . . . . . . . . . . . . 22
Chapter 3. General checkout . . . . . 25
What to do first . . . . . . . . . . . . . . . 25
Checkout guide . . . . . . . . . . . . . . . 26
Diagnosing problems . . . . . . . . . . . 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 built-in 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 . . . . . . . . . . . . . 37
Beep errors. . . . . . . . . . . . . . . 38
No-beep symptoms . . . . . . . . . . . 39
LCD-related symptoms . . . . . . . . . . 39
Intermittent problems . . . . . . . . . . . 40
Undetermined problems
. . . . . . . . . 40
Chapter 5. Use the keyboard
shortcuts . . . . . . . . . . . . . . . . 44
Chapter 6. Locations . . . . . . . . . 47
Locating computer controls and connectors . . . 47
Locating FRUs and CRUs . . . . . . . . . . . 49
Major FRUs . . . . . . . . . . . . . . 51
LCD FRUs . . . . . . . . . . . . . . . 54
Miscellaneous parts . . . . . . . . . . . 55
Connector and cable guide . . . . . . . . . . 56
Looking up FRU information . . . . . . . . . . 58
Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . . . 59
Service tool kit . . . . . . . . . . . . . . . 59
Screw notices . . . . . . . . . . . . . . . 59
Retaining serial numbers . . . . . . . . . . . 60
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . . 60
Retaining the UUID. . . . . . . . . . . . 61
Chapter 8. Removing or replacing a
FRU. . . . . . . . . . . . . . . . . . . 63
General guidelines. . . . . . . . . . . . . . 63
Before servicing the computer . . . . . . . . . 64
Disable Fast Startup and the built-in battery . . 64
1010 ThinkPad Pen Pro . . . . . . . . . . . . 64
1020 Nano-SIM card tray (for selected models) . . 65
1030 Base cover assembly . . . . . . . . . . 65
1040 Battery . . . . . . . . . . . . . . . . 66
1050 I/O bracket . . . . . . . . . . . . . . 68
1060 Wireless-WAN card (for selected models) . . 68
1070 M.2 solid-state drive . . . . . . . . . . . 69
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