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ThinkPad X1 Carbon

Hardware Maintenance Manual

Machine types: 20BS and 20BT

Note: Before using this information and the product it supports, be sure to read the general information under Appendix A “Notices” on page 89.

Second Edition (July 2015)

© Copyright Lenovo 2014, 2015.

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 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. 25
Power system checkout. 26
Checking the ac power adapter. 26
Checking the battery and operational charging. 27
Checking the coin-cell battery. 27
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 8.1 operating system. 30
Recovery overview for the Windows 10 operating system. 32
Resetting your computer. 32
Using advanced startup options. 33
Recovering your operating system if Windows 10 fails to start. 33
Creating and using a recovery USB drive. 33

Passwords ..... 34
Power-on password ..... 34
Hard disk password ..... 34
Supervisor password ..... 34
How to remove the power-on password ..... 35
How to remove the hard disk password ..... 35
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 ..... 39
No-beep symptoms ..... 39
LCD-related symptoms ..... 40
Intermittent problems ..... 40
Undetermined problems ..... 41
Chapter 5. Locations ..... 43
Locating computer controls, connectors, and indicators ..... 43
Front view ..... 43
Rear view ..... 44
Bottom view ..... 45
Locating FRUs and CRUs ..... 45
Major FRUs ..... 46
LCD FRUs ..... 47
Miscellaneous parts and other FRUs ..... 49
Looking up FRU information ..... 49
Chapter 6. FRU replacement notices ..... 51
Common service tools ..... 51
Screw notices ..... 51
Retaining serial numbers ..... 52
Restoring the serial number of the system unit ..... 52
Retaining the UUID ..... 53
Reading or writing the ECA information ..... 54
Chapter 7. Removing or replacing a FRU ..... 55
General guidelines ..... 55
Before servicing the computer ..... 56
Disabling the built-in battery ..... 56

Removing the micro-SIM-card tray and the micro SIM card. 56
Removing a major FRU 56
1010 Base cover assembly 57
1020 Battery 58
1030 M.2 solid-state drive 60
1040 Wireless LAN card 61
1050 Wireless WAN card 61
1060 Thermal fan 62
1070 Audio card 64
1080 Speaker assembly 65
1090 RJ45 card 66
1100 Fingerprint reader assembly 67
1110 System board assembly and coin-cell battery 68
1120 Power switch board 70
1130 LCD unit 71
1140 Keyboard assembly 73
Removing an LCD FRU for models without touch panel 73

2010 LCD bezel assembly . . . . . . . . . 73
2020 LCD panel and LCD cable . . . . . . 74
2030 Hinges . . . . . . . . . . . . . . . . . . . 75
2040 Camera/microphone card . . . . . . . . . . . 76
2050 LED cable assembly . . . . . . . . . . . . . . 77
2060 Antenna kit and LCD rear cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .