Lenovo ThinkPad T21 English - 46L4325 - ThinkPad T20, T21User's Reference guid - Page 3

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Contents © Copyright IBM Corp. 2000 Important safety instructions v Laser compliance statement ix Handling the ThinkPad computer xi ThinkPad don'ts xi ThinkPad do's xiii Cleaning your computer xiii Carrying your computer xiv Extending the life of your computer's battery xiv Chapter 1. System overview 1 Features 2 Specifications 5 Using your online user's guide 7 Starting BIOS Setup Utility 8 Chapter 2. Protecting your computer 11 Using passwords 12 Power-on password 12 Screen saver password 12 Hard-disk passwords 13 Windows password 13 Supervisor password 14 Network password 14 Passwords and standby mode 14 Using the locks and the security screw 15 Attaching the mechanical lock 15 Using the security screw 15 Using the Asset RF ID feature 16 Chapter 3. Solving computer problems 17 Troubleshooting 18 Error codes or messages 18 No error codes or messages 22 Power switch problem 22 Input problems 23 Standby or hibernation problems 25 LCD problems 28 Battery problems 30 Hard-disk-drive problems 31 Software problems 32 iii

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Contents
Important safety instructions
....................
v
Laser compliance statement
.....................
ix
Handling the ThinkPad computer
.................
xi
ThinkPad don'ts
. . . . . . . . . . . . . . . . . . . . . . . . . . .
xi
ThinkPad do's
. . . . . . . . . . . . . . . . . . . . . . . . . . .
xiii
Cleaning your computer
.....................
xiii
Carrying your computer
.....................
xiv
Extending the life of your computer's battery
.........
xiv
Chapter 1. System overview
. . . . . . . . . . . . . . . . . . . .
1
Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Using your online user's guide
....................
7
Starting BIOS Setup Utility
......................
8
Chapter 2.
Protecting your computer
.............
11
Using passwords
. . . . . . . . . . . . . . . . . . . . . . . . . . .
12
Power-on password
. . . . . . . . . . . . . . . . . . . . . . . .
12
Screen saver password
.....................
12
Hard-disk passwords
. . . . . . . . . . . . . . . . . . . . . . .
13
Windows password
. . . . . . . . . . . . . . . . . . . . . . . .
13
Supervisor password
. . . . . . . . . . . . . . . . . . . . . . .
14
Network password
. . . . . . . . . . . . . . . . . . . . . . . . .
14
Passwords and standby mode
..................
14
Using the locks and the security screw
..............
15
Attaching the mechanical lock
..................
15
Using the security screw
.....................
15
Using the Asset RF ID feature
...................
16
Chapter 3.
Solving computer problems
............
17
Troubleshooting
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
Error codes or messages
....................
18
No error codes or messages
..................
22
Power switch problem
......................
22
Input problems
. . . . . . . . . . . . . . . . . . . . . . . . . . .
23
Standby or hibernation problems
................
25
LCD problems
. . . . . . . . . . . . . . . . . . . . . . . . . . .
28
Battery problems
. . . . . . . . . . . . . . . . . . . . . . . . .
30
Hard-disk-drive problems
. . . . . . . . . . . . . . . . . . . . .
31
Software problems
. . . . . . . . . . . . . . . . . . . . . . . .
32
Copyright IBM Corp. 2000
iii