ThinkPad Yoga 14, Hardware Maintenance Manual

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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, a
hybrid 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
model, and standard models . . . . . . . . .
20
Product definition . . . . . . . . . . . . 20
FRU identification. . . . . . . . . . . . 21
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 the built-in battery and operational
charging . . . . . . . . . . . . . . .
27
Checking the coin-cell battery . . . . . . . 28
Chapter 4. Related service
information . . . . . . . . . . . . . .
29
Restoring the factory contents by using the
Recovery Disc Set . . . . . . . . . . . . .
29
Recovery overview for the Windows 8 and
Windows 8.1 operating system . . . . . . . .
30
Refreshing your computer . . . . . . . . 30
Resetting your computer to the factory default
settings. . . . . . . . . . . . . . . .
31
Using the advanced startup options . . . . 31
Recovering your operating system if Windows
8 or Windows 8.1 fails to start . . . . . . .
31
Creating and using recovery media . . . . . 32
Using the Windows recovery programs on the
Windows 8 operating system . . . . . . . . .
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 . . . . . . . . . . . 40
LCD-related symptoms . . . . . . . . . 40
Intermittent problems . . . . . . . . . . 40
Undetermined problems . . . . . . . . . 41
Chapter 5. Status indicators . . . . . 43
Chapter 6. Function keys . . . . . . . 45
Chapter 7. Locations . . . . . . . . . 47
Locating computer controls, connectors, and
indicators. . . . . . . . . . . . . . . . .
47
Front view. . . . . . . . . . . . . . . 47
Bottom view . . . . . . . . . . . . . . 48
Rear view . . . . . . . . . . . . . . . 48
Locating CRUs and FRUs . . . . . . . . . . 49
Major CRUs and FRUs. . . . . . . . . . 50
LCD FRUs . . . . . . . . . . . . . . 52
Miscellaneous parts and other FRUs . . . . 53
Looking up FRU information . . . . . . . . . 53
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . .
55
Screw notices . . . . . . . . . . . . . . . 55
Retaining serial numbers. . . . . . . . . . . 56
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . .
56
Retaining the UUID . . . . . . . . . . . 57
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