IBM Thinkpad X20 X21 X22 X23 X24 Manual

							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 only and
Master + User. The Master + Usermode requires
two HDPs and is designed for the system
administrator to input both in the same operation.
The system administrator then provides the user
HDP to the system user.
Attention:
If the user HDP is forgotten, check to see if a master HDP
was set. If a master HDP was set and can be recalled, this
will allow 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 HDPs nor 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 access
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 password:To remove the
POP, do the following:
(A) If SVP is installed and known by the servicer
1. Power on the computer while pressing and holdingF1.
2. Enter the supervisor password. The IBM BIOS Setup
Utility menu appears.
3. SelectPassword, using the cursor keys to move down
the menu.
4. SelectPower-on password. A pop-up window opens.
5. Enter the password. When the Enter New Password
field opens, leave it blank and pressEntertwice.
6. PressF10; then clickExit.
7. SelectYe sin the Setup Configuration window. The
POP has been removed.
Chapter 2. General descriptions
27 
						

							(B) If SVP is not installed
1. Turn off the computer.
2. Remove the DIMM cover from the bottom of the
computer.
3. Remove the backup battery. For information on how to
remove the backup battery, see“1030 Backup battery”
on page 60
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 DIMM cover.
How to remove the hard-disk password:
Attention:
IfUser onlymode is selected and the user HDP is
forgotten and cannot be made available to the servicer,
IBM does not provide any services to reset the user HDPs
nor recover data from the hard-disk drive. The hard-disk
drive can be replaced for a scheduled fee.
To remove the user HDP that has been forgotten, when
the SVP and master HDP is known,do the following:
1. Power on the computer by pressing and holdingF1.
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, where x is the letter of
the hard-disk drive. A pop-up window opens.
5. Select either User HDP or Master HDP.
6. Enter the master HDP; then leave the New Password
field blank and pressEntertwice.
7. PressF10
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.
Screen blank mode:In screen blank mode, the following
occurs:
vThe LCD backlight turns off.
vThe hard disk drive motor stops.
vThe speaker is muted.
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							Note:Screen blank mode in Windows 98 is called standby
mode in Windows 95.
To enter screen blank mode, pressFn+F3. To end screen
blank mode and resume normal operation, press any key.
Standby mode:When 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.
Note:Screen blank mode in Windows 98 and Windows
2000 is called standby mode in Windows 95.
To enter standby mode, do any of the following:
vPressFn+F4.
vClose the LCD cover. (To prevent the computer from
entering standby mode when the LCD is closed, click
Will not suspend even if LCD is closedin the Power
Management Properties window. Then only the LCD
turns off.)
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 the time set.
vIf the AC adapter is plugged in.
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:Even if you don’t set the low-battery alarm, the
charge indicator lets you know that 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.
Any one of the following events causes the computer to
resume operation from standby mode:
vTheFnkey is pressed.
vThe LCD cover is opened.
vThe ring indicator (RI) is signaled by a serial device or a
PC Card device. The power switch is turned on.
Chapter 2. General descriptions
29 
						

							vThe resume timer is set. In Windows 98, theScheduled
Taskssetting has priority over theResume on timer
selection in the“Power Management Properties”
window.
Note:The computer does not accept any input
immediately after it enters suspend mode. Wait a
few seconds before taking any action to reenter
operation mode.
Hibernation mode
Note for Windows NTA Windows NT user cannot create a hibernation file
in a Windows NT system that uses NTFS format,
the Windows NT default format. If you want to use
hibernation mode, you will need to reinstall Windows
NT 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.
Notes:
1. In the ThinkPad Configuration program, the
computer can be set tosuspend/hibernate
while docked.
2. The computer cannot enter hibernation mode
when it is powered with AC power and a
communication PC Card is used.
3. If the computer enters the hibernation mode
when it is docked to the docking station, do not
undock it from the docking station before
resuming normal operation. If you do undock it,
then if you try to resume normal operation, you
will get an error message, and you will have to
restart the system.
Any one of the following events causes the computer to
enter hibernation mode:
vTheFn+F12keys are pressed.
vThe power switch is turned off and the mode is set to
Power switch mode Hibernation.
vThe timer conditions are satisfied in suspend mode (for
operating systems other than Windows 98).
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							vA critically low battery condition occurs and the mode is
set toHibernate when battery becomes low.
When the power is turned on, the computer leaves
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.
Chapter 2. General descriptions
31 
						

							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 called PC-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 42
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 running the
IBM BIOS Setup Utility before you run PC-Doctor. In the
IBM BIOS Setup Utility screen, pressF9,Enter,F10, 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. If a device is in the Ultrabay 2000 or
connected to the USB connector of the docking station,
remove it and install it in the Ultrabay 2000 or connect it to
the USB connector of the computer. Then test it with
PC-Doctor.
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 pressingEnter, click the left
button.
1. Insert the PC-Doctor disk into the diskette drive; then
power on the computer.
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							If the computer cannot be powered on, go to“Power
system checkout”on page 35 and check the power
sources.
If an error code appears, go to“Symptom-to-FRU
index”on page 48.
On the first screen, select the model and pressEnter.
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
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
(*)
Chapter 2. General descriptions33 
						

							Notes:
vIn theKeyboardtest inInteractive tests, theFnkey is
scanned only once. Because of this, each key should be held
down for at least 2 seconds or it will not be sensed.
vThe sound card is not recognized in theStereo Speakerin the
Interactive Tests. To test it, use the audio device test in the
Other Devices (Diagnostics).
vVideo Adaptertest supports only the LCD display on
ThinkPad. Before running PC-Doctor DOS, detach the external
Monitor.
vTo testZIP DriveorLS-120 Drive, each media is needed to be
inserted before start testing.
vWireless LANtest is only for some models. Some model do
not have them.
vTo testDigital Signature Chip, the chip must be enabled and
initialized.
vWhen legacy Floppy Drives is Enabled in the BIOS Setup
Utility,Diskette Drivestest is activated even if no diskette
drive is attached to the ThinkPad.
vThere are 5 kinds of modem test inOther Devicestest menu.
Please check first which modem device you want to test as
belows.
Lucent Modem (M2) Loopback
Lucent Modem (M2)
Dialtone/DTMFLucent Modem
Lucent Soft Modem Loopback
Lucent Soft Modem DialtoneSoftware Modem used in
Wireless Combo Card
Intel Modem Register
Intel Modem Loopback/DTMFIntel combo / Xircom Depop
Combo Card
Intel SP Modem Register
Intel SP Modem
Loopback/DTMFIntel SP Combo Card
3Com MiniPCI Modem Test
3Com MiniPCI Dialtone Test3Com Combo Card
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, pressEsc.
Note:After executing PC-Doctor, check the system
time/date and reset them if needed.
34ThinkPad X20, X21, X22, X23, X24 
						

							Detecting system information with
PC-Doctor
PC-Doctor can detect the following system information:
Hardware Info:
vSystem Configuration
vMemory Contents
vPhysical Disk Drives
vLogical Disk Drives
vVGA Information
vIDE Drive Info
vPCI Information
vPNPISA Info
vSMBIOS Info
vVESA LCD Info
Utility:
vRun 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
Power system checkout
To verify the symptom of a problem, do the following:
1. Power off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Check that power is supplied when you power on the
computer.
5. Power off the computer.
6. Disconnect the AC adapter and install the charged
battery pack.
7. Check that the battery pack supplies power when you
power on the computer.
If you suspect a power problem, see the appropriate one
of the following power supply checkouts:
Chapter 2. General descriptions
35 
						

							v″Checking the AC adapter″36
v″Checking operational charging″36
v″Checking the battery pack″37
v″Checking the backup battery″37
Checking the AC adapter:If the computer fails only when
the AC adapter is used, check the following:
vIf the power problem occurs only when the port
replicator is used, replace the port replicator.
vIf the power-on indicator does not turn on, check the
power cord of the AC adapter for correct continuity and
installation.
vIf the computer does not charge during operation, go to
″Checking operational charging.″
1. Unplug the AC adapter cable from the computer and
measure the output voltage at the plug of the AC
adapter cable. See the following figure:
12
(16-10V)
Pin Voltage (V dc)
1 +15.5 to +17.0
2 Ground
If the voltage is not correct, replace the AC adapter. If
the voltage is acceptable, do the following:
vReplace the system board.
vIf the problem persists, go to“Product overview”on
page 42.
Note:Noise from the AC adapter does not always
indicate a defect.
Checking operational charging:To check operational
charging, use a discharged battery pack or a battery pack
that has less than 50% of the total power remaining when
installed in the computer.
Perform operational charging. If the battery status indicator
or icon does not turn on, remove the battery pack and let it
return to room temperature. Reinstall the battery pack.
36ThinkPad X20, X21, X22, X23, X24