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Lenovo ThinkPad X250 20CM and 20CL

Tags : LenovoThinkPadX25020CM20CL 
Lenovo ThinkPad X250 20CM and 20CL Hardware Maintenance Manual

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Description

Lenovo ThinkPad X250 20CM and 20CL Hardware Maintenance Manual
Second Edition (July 2015) - 118 pages

This manual contains service and reference information for the following ThinkPad® products.

ThinkPad X250 Machine types (MT): 20CM and 20CL

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

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 a hard disk drive or a
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
Lenovo Solution Center . . . . . . . . . 24
Quick test programs. . . . . . . . . . . 24
UEFI diagnostic program . . . . . . . . . 25
Bootable diagnostic programs. . . . . . . 26
Power system checkout . . . . . . . . . . . 26
Checking the ac power adapter . . . . . . 27
Checking operational charging . . . . . . 27
Checking the external battery pack . . . . . 27
Checking the coin-cell battery . . . . . . . 28
Chapter 4. Related service
information . . . . . . . . . . . . . . 29
Restoring the factory contents by using the
product Recovery Disc Set . . . . . . . . . . 29
Using the Windows recovery programs on the
Windows 8 and Windows 8.1 operating systems . 30
Recovery overview for the Windows 10 operating
system. . . . . . . . . . . . . . . . . . 33
Resetting your computer . . . . . . . . . 33
Using advanced startup options . . . . . . 33
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 33
Creating and using a recovery USB drive . . 34
Passwords . . . . . . . . . . . . . . . . 34
Power-on password . . . . . . . . . . . 35
Hard disk password . . . . . . . . . . . 35
Supervisor password . . . . . . . . . . 36
Power management . . . . . . . . . . . . 36
Screen blank mode (for the Windows 7
operating system only) . . . . . . . . . . 36
Sleep mode . . . . . . . . . . . . . . 36
Hibernation mode . . . . . . . . . . . 37
Symptom-to-FRU index . . . . . . . . . . . 37
Numeric error codes . . . . . . . . . . 38
Error messages . . . . . . . . . . . . 39
Beep symptoms . . . . . . . . . . . . 40
No-beep symptoms . . . . . . . . . . . 40
LCD-related symptoms . . . . . . . . . 40
Intermittent problems . . . . . . . . . . 41
Undetermined problems . . . . . . . . . 41
Chapter 5. Status indicators . . . . . 43
Chapter 6. Function keys and
combinations . . . . . . . . . . . . . 45
Chapter 7. Locations . . . . . . . . . 47
Locating computer controls, connectors, and
indicators. . . . . . . . . . . . . . . . . 47
Front view. . . . . . . . . . . . . . . 47
Left-side view . . . . . . . . . . . . . 48
Bottom view . . . . . . . . . . . . . . 48
Locating FRUs and CRUs . . . . . . . . . . 48
Major FRUs . . . . . . . . . . . . . . 50
LCD FRUs . . . . . . . . . . . . . . 52
Miscellaneous kits and other FRUs . . . . . 54
Looking up FRU information . . . . . . . 55
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . 57
Screw notices . . . . . . . . . . . . . . . 57
Retaining serial numbers. . . . . . . . . . . 58
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . 58
Retaining the UUID . . . . . . . . . . . 59
Reading or writing the ECA information . . . 59
Chapter 9. Removing or replacing a
FRU . . . . . . . . . . . . . . . . . . 61
General guidelines . . . . . . . . . . . . . 61
Before servicing the computer . . . . . . . . 62
Disabling the built-in battery . . . . . . . 62
Removing the micro-SIM-card tray . . . . . 62
1010 Removable battery pack . . . . . . . . 63
1020 Base cover assembly . . . . . . . . . . 63
1030 Internal battery pack . . . . . . . . . . 65
1040 Memory module . . . . . . . . . . . . 67
1050 Storage drive and drive cable . . . . . . 67
1060 Wireless-LAN card . . . . . . . . . . . 69
1070 Wireless-WAN card or M.2 solid-state drive . 70
1080 Fan assembly . . . . . . . . . . . . . 72
1090 dc-in cable assembly . . . . . . . . . . 74
1100 System board . . . . . . . . . . . . . 75
1110 Coin-cell battery. . . . . . . . . . . . 79
1120 Speaker assembly . . . . . . . . . . . 80
1130 Dummy smart-card-reader assembly,
smart-card-reader assembly, or 3rd NGFF
adapter . . . . . . . . . . . . . . . . . 80
1140 LCD unit . . . . . . . . . . . . . . . 83
1150 Power-button card . . . . . . . . . . . 86
1160 Keyboard assembly . . . . . . . . . . 87
For models with non-touch panel . . . . . . . 89
2010 LCD bezel . . . . . . . . . . . . 89
2020 LCD hinges, LCD panel, and LCD
cable. . . . . . . . . . . . . . . . . 89
2030 Camera/microphone module and camera
cable. . . . . . . . . . . . . . . . . 91
2040 Wireless LAN/WAN antenna assembly
and LCD rear-cover assembly . . . . . . . 93
For models with touch panel . . . . . . . . . 95
3010 LCD I-shaped bezel. . . . . . . . . 95
3020 LCD hinges and LCD front metal bezel . 96
3030 LCD panel and LCD cable . . . . . . 99
3040 Camera/microphone module and camera
cable. . . . . . . . . . . . . . . . . 101
3050 Wireless LAN/WAN antenna assembly
and LCD rear-cover assembly . . . . . . . 103
Appendix A. Notices. . . . . . . . . 107
Trademarks . . . . . . . . . . . . . . . . 108
Appendix B. Abbreviation and
acronym table . . . . . . . . . . . . 109




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