Table Of Contents - Lenovo 20E5 Hardware Maintenance Manual

Contents
About this manual. . . . . . . . . . .
Chapter 1. Safety information . . . . .
General safety . . . . . . . . . . . . . . .
Electrical safety . . . . . . . . . . . . . .
Safety inspection guide . . . . . . . . . . .
Handling devices that are sensitive to electrostatic
discharge. . . . . . . . . . . . . . . . .
Grounding requirements . . . . . . . . . . .
Safety notices (multilingual translations) . . . . .
Chapter 2. Important service
information . . . . . . . . . . . . . . 19
Strategy for replacing FRUs . . . . . . . . .
Strategy for replacing a solid-state drive . . .
Important notice for replacing a system
board . . . . . . . . . . . . . . . .
How to use error message . . . . . . . .
Strategy for replacing FRUs for CTO, special-bid,
and standard models . . . . . . . . . . . .
Product definition . . . . . . . . . . . .
FRU identification. . . . . . . . . . . .
Chapter 3. General checkout . . . . . 23
What to do first . . . . . . . . . . . . . .
Checkout guide . . . . . . . . . . . . . .
Lenovo Solution Center . . . . . . . . .
Quick test programs. . . . . . . . . . .
UEFI diagnostic program . . . . . . . . .
Bootable diagnostic programs. . . . . . .
Power system checkout . . . . . . . . . . .
Checking the ac power adapter . . . . . .
Checking the battery and operational
charging . . . . . . . . . . . . . . .
Checking the coin-cell battery . . . . . . .
Chapter 4. Related service
information . . . . . . . . . . . . . . 29
Restoring the factory contents by using the
product Recovery Disc Set . . . . . . . . . .
Using the Windows recovery programs on the
Windows 8.1 operating system . . . . . . . .
Recovery overview for the Windows 10 operating
system . . . . . . . . . . . . . . . . . .
Resetting your computer . . . . . . . . .
Using advanced startup options . . . . . .
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . .
Creating and using a recovery USB drive . .
© Copyright Lenovo 2015
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Passwords . . . . . . . . . . . . . . . .
Power-on password . . . . . . . . . . .
1
Hard disk password . . . . . . . . . . .
1
Supervisor password . . . . . . . . . .
1
How to remove the power-on password . . .
2
How to remove the hard disk password . . .
Power management
3
Screen blank mode (for the Windows 7
4
operating system only) . . . . . . . . . .
4
Sleep mode . . . . . . . . . . . . . .
Hibernation mode
Symptom-to-FRU index . . . . . . . . . . .
Numeric error codes
19
Error messages . . . . . . . . . . . .
19
Beep symptoms . . . . . . . . . . . .
No-beep symptoms . . . . . . . . . . .
20
LCD-related symptoms . . . . . . . . .
20
Intermittent problems . . . . . . . . . .
Undetermined problems . . . . . . . . .
20
20
Chapter 5. Locations . . . . . . . . . 41
20
Locating computer controls, connectors, and
indicators. . . . . . . . . . . . . . . . .
Front view. . . . . . . . . . . . . . .
23
Left-side view . . . . . . . . . . . . .
24
Bottom view . . . . . . . . . . . . . .
24
Locating FRUs and CRUs . . . . . . . . . .
24
Major FRUs . . . . . . . . . . . . . .
25
LCD FRUs
25
Miscellaneous parts and other FRUs . . . .
26
Looking up FRU information . . . . . . . . .
26
Chapter 6. FRU replacement
27
notices . . . . . . . . . . . . . . . . 51
27
Common service tools
Screw notices . . . . . . . . . . . . . . .
Retaining serial numbers. . . . . . . . . . .
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . .
29
Retaining the UUID . . . . . . . . . . .
30
Reading or writing the ECA information . . .
32
Chapter 7. Removing or replacing a
32
FRU . . . . . . . . . . . . . . . . . . 55
33
General guidelines . . . . . . . . . . . . .
Before servicing the computer . . . . . . . .
33
Disabling the built-in battery . . . . . . .
33
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