IBM 2681 Hardware Maintenance Manual - Page 3

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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 5 Safety information 17 General safety 17 Electrical safety 18 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 28 Service web site 28 Restoring the preloaded system 28 Passwords 30 Power management 33 Checkout guide 36 Testing the computer 36 Detecting system information with PC-Doctor. . . 38 Power system checkout 39 ThinkPad R40 43 Product overview 45 Specifications 45 Status indicators 48 FRU tests 50 Fn key combinations 52 Symptom-to-FRU index 53 Numeric error codes 53 Error messages 56 Beep symptoms 57 No-beep symptoms 57 LCD-related symptoms 58 Intermittent problems 59 Undetermined problems 59 FRU replacement notices 60 Screw notices 60 Retaining serial numbers 61 Removing and replacing a FRU 63 1010 Battery pack 64 1020 Ultrabay Plus device 65 © Copyright IBM Corp. 2004 iii

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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
.
.
.
.
.
.5
Safety
information
.
.
.
.
.
.
.
.
.
.
.
. 17
General
safety
.
.
.
.
.
.
.
.
.
.
.
. 17
Electrical
safety
.
.
.
.
.
.
.
.
.
.
. 18
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
.
.
.
.
.
.
.
.
. 28
Service
web
site
.
.
.
.
.
.
.
.
.
.
. 28
Restoring
the
preloaded
system
.
.
.
.
.
. 28
Passwords
.
.
.
.
.
.
.
.
.
.
.
.
. 30
Power
management
.
.
.
.
.
.
.
.
.
. 33
Checkout
guide
.
.
.
.
.
.
.
.
.
.
.
. 36
Testing
the
computer
.
.
.
.
.
.
.
.
.
. 36
Detecting
system
information
with
PC-Doctor
.
.
. 38
Power
system
checkout
.
.
.
.
.
.
.
.
. 39
ThinkPad
R40
.
.
.
.
.
.
.
.
.
.
.
.
. 43
Product
overview
.
.
.
.
.
.
.
.
.
.
.
. 45
Specifications
.
.
.
.
.
.
.
.
.
.
.
. 45
Status
indicators
.
.
.
.
.
.
.
.
.
.
. 48
FRU
tests
.
.
.
.
.
.
.
.
.
.
.
.
. 50
Fn
key
combinations
.
.
.
.
.
.
.
.
.
. 52
Symptom-to-FRU
index
.
.
.
.
.
.
.
.
.
. 53
Numeric
error
codes
.
.
.
.
.
.
.
.
.
. 53
Error
messages
.
.
.
.
.
.
.
.
.
.
. 56
Beep
symptoms
.
.
.
.
.
.
.
.
.
.
. 57
No-beep
symptoms
.
.
.
.
.
.
.
.
.
. 57
LCD-related
symptoms
.
.
.
.
.
.
.
.
. 58
Intermittent
problems
.
.
.
.
.
.
.
.
.
. 59
Undetermined
problems
.
.
.
.
.
.
.
.
. 59
FRU
replacement
notices
.
.
.
.
.
.
.
.
. 60
Screw
notices
.
.
.
.
.
.
.
.
.
.
.
. 60
Retaining
serial
numbers
.
.
.
.
.
.
.
.
. 61
Removing
and
replacing
a
FRU
.
.
.
.
.
.
.
. 63
1010
Battery
pack
.
.
.
.
.
.
.
.
.
.
. 64
1020
Ultrabay
Plus
device
.
.
.
.
.
.
.
. 65
©
Copyright
IBM
Corp.
2004
iii