Lenovo G41 manual Contents

Contents

About this manual	. . . . . .	. . .	.	.	1
Introduction . .	. . . . . .	. . .	.	.	3

Important service information . . . . . . . . . 3 Strategy for replacing FRUs . . . . . . . . 3 How to use error messages . . . . . . . . 4 Diskette compatibility matrix . . . . . . . . . 4 Safety notices: multilingual translations . . . . . . 4 Safety information. . . . . . . . . . . . 16 General safety . . . . . . . . . . . . 16 Electrical safety . . . . . . . . . . . 17 Safety inspection guide . . . . . . . . . 19

Handling devices that are sensitive to electrostatic discharge . . . . . . . . . . . . 20

Grounding requirements . . . . . . . . . 21 Laser compliance statement. . . . . . . . . 21

General descriptions . . . .	. .	.	. .	.	25
Read this first	. .	.	. .	.	25
What to do first	. .	.	. .	.	25
Related service information . . .	. .	.	. .	.	28
Service Web site	. .	.	. .	.	28
Restoring the preloaded system	. .	.	. .	.	28
Passwords . . . . . . . . . . . . . 30
Power management . . . .	. .	.	. .	.	33
Checkout guide	. .	.	. .	.	35
Testing the computer . . . .	. .	.	. .	.	35
Detecting system information with PC-Doctor. . . 37
Power system checkout . . .	. .	.	. .	.	38

ThinkPad G40, G41	.	.	43
Product overview	.	.	45
Specifications	.	.	45
Status indicators	.	.	47
FRU tests	.	.	49
Fn key combinations	.	.	51
Symptom-to-FRU index	.	.	52
Numeric error codes	.	.	52
Error messages	.	.	56
Beep symptoms	.	.	58
No-beep symptoms	.	.	58
LCD-related symptoms	.	.	59
Intermittent problems	.	.	60
Undetermined problems	.	.	60
FRU replacement notices	.	.	61
Screw notices	.	.	61
Retaining serial numbers	.	.	62
Removing and replacing a FRU	.	.	65
1010 Battery pack	.	.	66
1020 Hard disk drive	.	.	67

© Lenovo 2005. Portions © IBM Corp. 2005. iii