Lenovo 33472YU, S230U manual Contents

Contents

About this manual. . . . . . . . . . . iii

Chapter 1. Safety information . . . . . . 1

General safety . . . . . . . . . . . . . . . . 1 Electrical safety . . . . . . . . . . . . . . . 2 Safety inspection guide . . . . . . . . . . . . 3

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 hard disk drive, a
solid-state drive, or an mSATA solid-state
drive	22
Important notice for replacing a system
board	22
How to use error message	22
Strategy for replacing FRUs for CTO, CMV, and
GAV	22
Product definition	22
FRU identification for CTO, CMV, and GAV
products	23

Chapter 3. General checkout	25
What to do first	25
Checkout guide	26
Lenovo Solution Center	26
Quick test programs	26
UEFI diagnostic program	27
Bootable diagnostic programs	27
Power system checkout	28
Checking the ac power adapter	28
Checking operational charging	29
Checking the battery pack	29
Checking the backup battery	29
Chapter 4. Related service
information	31
Restoring the factory contents by using Recovery
Disc Set	31
Using the Windows recovery programs on the
Windows 8 operating system	32
Passwords	33
Power-on password	33
Hard-disk password	33
Supervisor password	34

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
Wireless off mode	36
Symptom-to-FRU index	36
Numeric error codes	36
Error messages	38
No-beep symptoms	38
Beep symptoms	38
LCD-related symptoms	39
Intermittent problems	39
Undetermined problems	39
Chapter 5. Status indicators	41
Chapter 6. Special keys	43
Chapter 7. Locations	45
Locating computer controls, connectors, and
indicators	45
Front view	45
Rear view	46
Bottom view	46
Locating FRUs and CRUs	46
Major FRUs and CRUs	48
LCD FRUs	50
Looking up FRU information	51
Chapter 8. FRU replacement
notices	53
Screw notices	53
Retaining serial numbers	54
Restoring the serial number of the system
unit	54
Retaining the UUID	55
Reading or writing the ECA information . . .	55
Chapter 9. Removing or replacing a
FRU	57
Before servicing the computer	58
Disabling the built-in battery	58
Removing the SIM card	58
1010 Hard disk drive or solid-state drive . . . .	58
1020 Keyboard	60
1030 PCI Express Mini Card for wireless LAN . .	62

© Copyright Lenovo 2012 i