IBM Thinkpad T20 T21 T22 T23 Manual

Note:Network drivers are not automatically restored
with Windows NT 4.0; you will need to reinstall
them.
Note:If you use Windows 2000 or Windows 98,
restart the system by pressing Ctrl+Alt+Del or
by turning the computer off and then on again.
The computer will restart with the pre-installed
operating system, drivers, and software.
Using the recovery CDTo create the service partition and install the preloaded
system from the recovery CD, do the following:
To create the service partition:
1. Erase all...

vTo preload the hard-disk drive without installing the
service partition, press N key.
8. If you get a message asking which operating system
to install, select the proper operating system and
press Enter.
9. A message is displayed:“Full Recovery:”. Press
Enter to select.
10. On each of the next three windows, press the Y key.
11. Follow the prompts to complete the recovery.
To use the Recovery Repair diskette:
1. Shut down and turn off the computer.
2. Insert the Recovery Repair diskette into the drive,...

Attention:If the user HDP has been forgotten, check
whether a master HDP has been set. If it has, it can be
used for access to the hard-disk drive. If no master HDP is
available, IBM does not provide any services to reset
either the user or the master HDP, or to recover data from
the hard-disk drive. The hard-disk drive can be replaced
for a scheduled fee.
Supervisor password:A supervisor password (SVP) protects the system
information stored in the IBM BIOS Setup Utility. The SVP
must be entered in order...

8. Press F10; then, in the Setup confirmation window,
selectYe s.
How to remove the hard-disk passwordAttention:IfUser onlymode is selected and the user
HDP has been forgotten and cannot be made available to
the servicer, IBM does not provide any services to reset
the user HDPs or to recover data from the hard-disk drive.
The hard-disk drive can be replaced for a scheduled fee.
To remove a user HDP that has been forgotten, when the
SVP and the master HDP are known, do the following:
1. Power on the...

vThe hard-disk drive motor stops.
3. If the time set on the“Turn off monitor”timer in the
operating system expires,
vThe LCD backlight turns off.
To end screen blank mode and resume normal operation,
press any key.
Standby modeWhen the computer enters standby mode, the following
events occur in addition to what occurs in screen blank
mode:
vThe LCD is powered off.
vThe hard-disk drive is powered off.
vThe CPU stops.
To enter standby mode, press Fn+F4.
Note:You can change the action of Fn+F4, if you are...

vTurn on the power switch.
Also, the computer automatically returns from standby
mode and resumes operation in either of the following
events:
vThe ring indicator (RI) is signaled by a serial device or a
PC Card device (Windows 2000 does not support the
ring indicator (RI) resume by PC Card device.)
vThe time set on the resume timer elapses. In Windows
98, theScheduled Taskssetting takes priority over the
Resume on timerselection in the“Power Management
Properties”window.
Note:The computer does not...

vIf you are using the ACPI operating system and have
defined one of the following actions as the event that
causes the system to go into hibernation mode, perform
that action.
–Closing the lid.
–Pressing the power button.
–Pressing Fn+F4 keys.
Also, the computer goes into hibernation mode
automatically in either of the following conditions:
vIf a“hibernation time”has been set on the timer, and the
user does not do any operation with the keyboard, the
TrackPoint, the hard-disk drive, the parallel...

Checkout guide
Use the following procedures as a guide in identifying and
correcting problems with the ThinkPad computer.
Note:The diagnostic tests are intended to test only IBM
products. The use of non-IBM products, prototype
cards, or modified options can lead to false
indications of errors and invalid system responses.
1. Identify the failing symptoms in as much detail as
possible.
2. Verify the symptoms. Try to re-create the failure by
running the diagnostic test or by repeating the
operation....

If an error code appears, go to“Symptom-to-FRU
index”on page 49.
On the first screen, select the model and press Enter.
Follow the instructions on the screen.
2. The main panel of PC-Doctor appears.
3. SelectDiagnosticswith the arrow keys, and press
Enter.
A pull-down menu appears. (Its exact form depends on
the model.)
The options on the test menu are as follows:
Diagnostics Interactive Tests
vRun Normal Test
vRun Quick Test
vCPU/Coprocessor
vSystemboard
vVideo Adapter
vSerial Ports
vParallel Ports...

Diagnostics
Quit Interactive TestsHardware Info
UtilityF1=Help
Run Quick TestRun Normal Test
SystemboardCPU/Coprocessor
Video Adapter
Serial Ports
Diskette DrivesFixed DisksParallel Ports
Other Devices
Use the cursor keys and ESC to move in menus. Press ENTER to select.PC-DOCTOR 2.0 Copyright 2001 PC-Doctor, Inc. All Rights Reserved. ZIP Drive
LS-120/240 Drive
Communication
Wireless LAN
Memory Test - Full
Memory Test - Quick
4. Run the applicable function test.
5. Follow the instructions on the screen....