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 partitions on the hard-disk drive, using FDISK
or a similar application.
2. Boot with the recovery CD (and the boot diskette if
required.)
3. Following message is displayed:“Your computer
originally included a Product Recovery program ...
Reinstall the Product Recovery program? (Y/N) [ ]”.
Note:If the hard-disk drive contains any partitions, you
do not receive this message; go to step 1.
4. Press Y key. The service partition is created and
loaded with the Product Recovery program files.
Note:If you do not want to create the service partition,
press N key, and then go to step 8.
5. At next window, press Enter to continue.
vThe service partition is created. The system
automatically reboots during this process.
vThe recovery process copies some files to the
service partition, and PKUNZIPs others.
vFollow the prompts. You may be prompted to
change CDs.
vWhen the process is complete, the system reboots.
Continue to step 6 to install preloaded system.
Install preloaded system from CD:
6. Boot with the recovery CD (and the boot diskette if
required.)
7. If the hard-disk drive is blank, the following message
is displayed:“Your computer originally included a
Product Recovery program ... Reinstall the
Product Recovery program? (Y/N) [ ]”.
vTo install the service partition, go to step 4.
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General descriptions25 
						

							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, and
then turn on the computer.
3. Follow the on-screen instructions.
Passwords
As many as three passwords may be needed for any
ThinkPad computer: the power-on password (POP), the
hard-disk password (HDP), and the supervisor password
(SVP).
If any of these passwords has been set, a prompt for it
appears on the screen whenever the computer is turned
on. The computer does not start until the password is
entered.
Exception:If only an SVP is installed, the password
prompt does not appear when the operating
system is booted.
Power-on password:A power-on password (POP) protects the system from
being powered on by an unauthorized person. The
password must be entered before an operating system can
be booted.
Hard-disk password:There are two hard-disk passwords (HDPs):
vUser HDP—for the user
vMaster HDP—for the system administrator, who can use
it to get access to the hard disk even if the user has
changed the user HDP
Note:There are two modes for the HDP:User onlyand
Master + User. TheMaster + Usermode requires
two HDPs; the system administrator enters both in
the same operation. The system administrator then
provides the user HDP to the system user.
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							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 to get access to the IBM BIOS
Setup Utility and make changes to system configuration
settings.
Attention:If the SVP has been forgotten and cannot be
made available to the servicer, there is no service
procedure to reset the password. The system board must
be replaced for a scheduled fee.
How to remove the power-on passwordTo remove a POP that you have forgotten, do the
following:
(A) If no SVP has been set:
1. Turn off the computer.
2. Remove the battery pack.
For how to remove the battery pack, see“1010 Battery
pack”on page 60.
3. Remove the backup battery.
For how to remove the backup battery, see“1020
Backup battery”on page 61.
4. Turn on the computer and wait until the POST ends.
After the POST ends, the password prompt does not
appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.
(B) If an SVP has been set and is known by the servicer:
1. Turn on the computer by pressing and holding F1.
2. Enter the SVP. The IBM BIOS Setup Utility menu
appears.
3. SelectPassword, using the cursor keys to move down
the menu.
4. SelectPower-On Password.
5. At the Enter Current Password field, enter the SVP.
6. When the Enter New Password field opens, leave it
blank and press Enter twice.
7. In the Changes have been saved window, press Enter.
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General descriptions27 
						

							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 computer by pressing and holding F1.
2. Enter the SVP. The IBM BIOS Setup Utility menu
appears.
3. SelectPassword, using the cursor keys to move down
the menu.
4. SelectHard-diskxpassword, wherexis the letter of
the hard-disk drive. A pop-up window opens.
5. SelectMaster HDP.
6. Enter the master HDP; then leave the New Password
field blank and press Enter twice.
7. Press F10.
8. SelectYe sin the Setup Configuration window.
Both user HDP and master HDP will have been
removed.
Power management
To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.
NotesvScreen blank mode is calledstandby modein
Windows 95 and Windows NT.
vStandby mode is calledsuspend modein
Windows 95 and Windows NT.
Screen blank modeScreen blank mode has three variants, as follows:
1. If you press Fn+F3, or the time set on the“LCD off
timer”in IBM BIOS Setup Utility expires,
vThe LCD backlight turns off.
vThe hard-disk drive motor stops.
vThe speaker is muted.
2. If you are using the ACPI operating system and you
press Fn+F3,
vThe LCD backlight turns off.
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							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
using the ACPI operating system.
In certain circumstances, the computer goes into standby
mode automatically:
vIf a“suspend time”has been set on the timer, and the
user does not do any operation with the keyboard, the
TrackPoint, the hard disk, the parallel connector, or the
diskette drive within that time.
vIf the battery indicator blinks orange, indicating that the
battery power is low. (Alternatively, ifHibernate when
battery becomes lowhas been selected in the“Power
Management Properties”window, the computer goes
into hibernation mode.)
Note for the APM operating system:
Even if you do not set the low-battery alarm, the charge
indicator notifies you when the battery is low, and then the
computer enters the power-saving mode automatically.
This default low-battery behavior is independent of the
operating system; so if you have set the low-battery alarm,
the computer may not do what you specified. It chooses
either your setting or the default setting, whichever is
appropriate.
If you are using the ACPI operating system, only the
low-battery alarm is available.
To cause the computer to return from standby mode and
resume operation, do one of the following:
vPress the Fn key.
vOpen the LCD cover (only if you are using Windows Me
and you entered standby mode by closing the LCD
cover.)
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							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 accept any input
immediately after it enters standby mode. Wait a
few seconds before taking any action to reenter
operation mode.
Hibernation mode
Note for Windows NTIf you are using Windows NT in the default format,
NTFS, you cannot create a hibernation file. If you
want to use hibernation mode, you will need to
reinstall Windows NT with FAT format.
Note for OS/2If you are using OS/2 in the default format, HPFS,
you cannot create a hibernation file. If you want to
use hibernation mode, you will need to reinstall
OS/2 with FAT format.
In hibernation mode, the following occurs:
vThe system status, RAM, VRAM, and setup data are
stored on the hard disk.
vThe system is powered off.
Note:If the computer enters the hibernation mode while it
is docked to the docking station, do not undock it
from the docking station before resuming normal
operation. If you do undock it and then try to
resume normal operation, you will get an error
message, and you will have to restart the system.
To cause the computer to enter hibernation mode, do any
of the following:
vPress the Fn+F12 keys.
vIf you are using the APM operating system and have set
the mode toPower switch mode [Hibernation], turn
off the power switch.
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							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 connector, or
the diskette drive within that time.
vIf the timer conditions are satisfied in suspend mode.
vIf you are using the APM operating system and have set
the mode toHibernate when battery becomes low,
and the battery charge becomes critically low.
When the power is turned on, the computer returns from
hibernation mode and resumes operation. The hibernation
file in the boot record on the hard-disk drive is read, and
system status is restored from the hard-disk drive.
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General descriptions31 
						

							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.
Testing the computer
The ThinkPad computer has a test program called
PC-Doctor®DOS (hereafter calledPC-Doctor.) You can
detect errors by running the diagnostics test included in
PC-Doctor. This section is an overview of the procedure.
For details that depend on model-unique functions, refer to
“Product overview”on page 41.
For some possible configurations of the computer,
PC-Doctor might not run correctly. To avoid this problem,
you need to initialize the computer setup by use of the IBM
BIOS Setup Utility before you run PC-Doctor. On the IBM
BIOS Setup Utility screen, press F9, Enter, F10, and then
Enter.
Note:When you initialize the computer configuration,
some devices are disabled, such as the serial port.
If you test one of these devices, you will need to
enable it by using PS2.EXE.
PC-Doctor cannot be used to test a device that is in the
docking station, even if the computer supports the docking
station. To test a USB device, connect it to the USB
connector of the computer. To test the Ultrabay 2000
device, install it in the Ultrabay 2000 slot of the computer.
To run the test, do as follows:
Note:In the following procedure, you can select an item
not only with the arrow keys, but also with the
TrackPoint. Instead of pressing Enter, click the left
button.
1. Insert the PC-Doctor disk into the diskette drive; then
power on the computer.
If the computer cannot be powered on, go to“Power
system checkout”on page 35, and check the power
sources.
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32ThinkPad T20, T21, T22, T23 (MT 2647/2648) 
						

							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
vFixed Disks
vDiskette Drives
vOther Devices
vZIP Drive
vLS-120/240 Drive
vCommunication
vWireless LAN(*)
vMemory Test–Full
vMemory Test–QuickvKeyboard
vVideo
vInternal Speaker
vMouse
vJoystick Test
vDiskette
vSystem Load
vCD-ROM/DVD Test
vStereo Speaker
v802.11 Wireless Radio
Test(*)
Notes:
vIn theKeyboardtest inInteractive Tests, the Fn key
is scanned only once. Each key should be held down
for at least 2 seconds; otherwise, it cannot be sensed.
vThe sound card is not recognized in theStereo
Speakerin theInteractive Tests. To test it, use the
audio device test in theOther Devicesin
Diagnostics.
vVideo Adaptertest supports only the LCD display on
ThinkPad. Before running PC-Doctor DOS, detach the
external Monitor.
vTo testZIP DriveorLS-120/240 Drive, each media is
needed to be inserted before start testing.
vWireless LANtest and802.11 Wireless Radio Testis
only for some models. Some models do not have
them.
vTo testDigital Signature Chip, the chip must be
enabled and initialized.
vWhenLegacy Floppy Drivesis Enabled in the IBM
BIOS Setup Utility,Diskette Drivestest is activated
even if no legacy diskette drive is attached to the
ThinkPad.
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General descriptions33 
						

							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. If there is a
problem, PC-Doctor shows messages describing it.
6. To exit the test, selectQuit—Exit Diag.
To cancel the test, press Esc.
Note:After executing PC-Doctor, check the system
time/date and reset them if needed.
Detecting system information with
PC-Doctor
PC-Doctor can detect the following system information:
Hardware InfovSystem Configuration
vMemory Contents
vPhysical Disk Drives
vLogical Disk Drives
vVGA Information
vIDE Drive Info
vPCI Information
vPNPISA Info
vSMBIOS Info
vVESA LCD Info
UtilityvRun External Tests
vSurface Scan Hard Disk
vBenchmark System
vDOS Shell
vTech Support Form
vBattery Rundown
vView Test Log
vPrint Log
vSave Log
vFull Erase Hard Drive
vQuick Erase Hard Drive
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34ThinkPad T20, T21, T22, T23 (MT 2647/2648)