Lenovo T41/T41P, T42/T42P 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. . . . . . . . . 22

General descriptions	.	.	25
Read this first	.	.	25
What to do first	.	.	25
Related service information	.	.	27
Service Web site	.	.	27
Restoring the pre-installed system . . . .	.	.	27
Passwords . . . . . . . . . . . . . 28
Power management	.	.	32
Checkout guide	.	.	35
Testing the computer	.	.	35
Detecting system information with PC-Doctor. . . 38
Power system checkout	.	.	39

ThinkPad T40/T40p, T41/T41p, T42/T42p Series		43
Product overview	.	45
Specifications	.	45
Status indicators	.	50
FRU tests	.	53
Fn key combinations	.	54
Symptom-to-FRU index	.	58
Numeric error codes	.	58
Error messages	.	62
Beep symptoms	.	63
No-beep symptoms	.	63
LCD-related symptoms	.	64
Intermittent problems	.	65
Undetermined problems	.	65
FRU replacement notices	.	66
Screw notices	.	66
Retaining serial numbers	.	67
Removing and replacing a FRU	.	70
1010 Battery pack for 14.1-in. LCD models . .	.	71
1020 Battery pack for 15.0-in. LCD models . .	.	73

© Lenovo 2006. Portions © IBM Corp. 2006. iii