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 . . . . . . . . . . . .34

Testing the computer . . . . . . . . . .34

Detecting system information with PC-Doctor . . .37

Power system checkout . . . . . . . . .37

ThinkPad R50/R50p and R51 Series . . . . . .41

Product overview . . . . . . . . . . . .43

Specifications . . . . . . . . . . . .43

Status indicators . . . . . . . . . . .48

FRU tests . . . . . . . . . . . . .50

Fn key combinations . . . . . . . . . .52

Symptom-to-FRU index . . . . . . . . . .54

Numeric error codes . . . . . . . . . .54

Error messages . . . . . . . . . . .58

Beep symptoms . . . . . . . . . . .59

No-beep symptoms . . . . . . . . . .59

LCD-related symptoms . . . . . . . . .60

Intermittent problems . . . . . . . . . .61

Undetermined problems . . . . . . . . .61

FRU replacement notices . . . . . . . . .62

Screw notices . . . . . . . . . . . .62

Retaining serial numbers . . . . . . . . .63

Removing and replacing a FRU . . . . . . . .66

1010 Battery pack . . . . . . . . . . .67

1020 Ultrabay Enhanced device . . . . . .68

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