IBM A22e User Manual

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®
ThinkPad Service and Troubleshooting Guide
A22e
Note
Before using this information and the product it supports, be sure to read the general information under “Appendix A. Important safety instructions” on page 39 and “Appendix B. Product warranties and notices” on page 45 .
DANGER
v To avoid electric shock hazard, connect and disconnect cables appropriately when installing, moving or opening
the covers of this product or attached devices. Use the power cord with a properly grounded outlet.
v Do not leave the base of your computer in contact with your lap or any part of your body for an extended
period when the computer is functioning or when the battery is charging. Your computer dissipates some heat during normal operation. This heat is a function of the level of system activity and battery charge level. Extended contact with your body, even through clothing, could cause discomfort or, eventually, a skin burn.
v To reduce the risk of electric shock, do not use your computer in or near water. v To avoid electric shock, do not use your computer with the telephone cable connection during an electrical
storm. Do not connect the cable to or disconnect it from the telephone outlet on the wall during an electrical storm.
v Store packing materials safely out of the reach of children to prevent the risk of suffocation from plastic bags. v The battery pack contains a small amount of harmful substances. There is danger of an explosion if the battery
pack is incorrectly replaced, exposed to fire or water, short-circuited or disassembled. Keep the battery pack away from children and do not put it in trash that is disposed of in landfills.
v To reduce the risk of fire, use only No. 26 AWG or thicker telephone cable. v The fluorescent lamp in the LCD contains mercury. Do not put it in trash that is disposed of in landfills. Rough
handling or dropping the computer can cause the LCD to break and the internal fluid to get into your eyes or on your hands. Immediately wash the affected areas with water. If symptoms persist, seek medical care.
v Do not open the CD or DVD drive unit, as this might result in hazardous radiation exposure. v Avoid direct eye exposure with the laser beam contained in some drives.
First Edition (April 2001) Second Edition (June 2001) Third Edition (August 2001)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION AS ISWITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.
This information could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice.
IBM may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.
© Copyright International Business Machines Corporation 2001. All rights reserved.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Finding information with Access ThinkPad

Join an interactive community of ThinkPad users to access mobile resources, read tips and true stories, and share your own advice.
Customize your ThinkPad with accessories, software and services.
A one-click guide to service on the Web for your ThinkPad.
Your gateway into a comprehensive help system, offering information about all of your ThinkPad computer hardware and software features.
A quick way to search the help system.
© Copyright IBM Corp. 2001 iii
Whenever you have a question about your computer, or wish to view IBM Web sites, simply press the ThinkPad button to open Access ThinkPad.
Access ThinkPad includes a comprehensive, on-board help and information center for your computer. It travels with you, eliminating the need to carry reference manuals.
Find information about your ThinkPad computer and its features by using the Quick Search or clicking one of the topics shown. This opens another window, where you can view hundreds of help topics by browsing the table of contents, using the index, or performing a search.
View help topics to learn how to:
v Use your computer hardware features v Connect to the internet or a local network v Set up a projector for your presentation v Use passwords and other security features v Install, remove and recover software v Upgrade your system v Extend the life of your battery v Troubleshoot problems v Contact IBM for service and support v Perform many other tasks
iv ThinkPad
Click one of the Internet buttons to join an interactive ThinkPad Web community, or to directly access information about accessories and software updates, small business offerings, and help and support.
®
A22e Service and Troubleshooting Guide
Some of the topics in your help system contain brief video clips that show you how to perform certain tasks, such as replacing your battery, inserting a PC card, or upgrading your memory. Use the controls shown to play, pause, and rewind the video clip.
Finding information with Access ThinkPad v
vi ThinkPad
®
A22e Service and Troubleshooting Guide

Contents

Finding information with Access ThinkPad iii
Chapter 1. Overview of your new ThinkPad
computer .............1
Your ThinkPad at a glance .......2
Features..............3
Specifications ............5
Caring for your ThinkPad computer ....6
Chapter 2. Solving computer problems . . 9
Diagnosing problems .........10
Troubleshooting...........11
Error messages ..........11
Errors without messages .......13
A password problem ........15
A power switch problem.......15
Keyboard problems ........15
TrackPoint problems ........16
Standby or hibernation problems ....17
Computer screen problems ......21
Battery problems .........22
Hard disk drive problems ......23
Other problems ..........24
Starting BIOS Setup Utility .......25
Recover pre-installed software ......26
Upgrading the hard disk drive ......29
Replacing the battery .........31
Getting help and service ........34
Getting help on the Web ........34
Getting help by fax .........35
Calling IBM ............35
Appendix A. Important safety instructions 39
Modem safety information .......41
Laser compliance statement .......42
Appendix B. Product warranties and
notices .............45
Warranty Period ..........45
IBM Statement of Limited Warranty ....45
Part1-General Terms .......45
Part2-Country-unique Terms.....49
Notices..............57
Processing date data ........57
References to the Web site addresses . . . 57
Electronic emission notices ......58
Telecommunication notices ......59
Industry Canada requirements .....61
Notice for Australia ........62
Notice for Users in New Zealand ....62
Notice for European Union countries. . . 64
Trademarks ............65
Index ..............67
Chapter 3. Getting help and service from
IBM...............33
© Copyright IBM Corp. 2001 vii
viii ThinkPad
®
A22e Service and Troubleshooting Guide

Chapter 1. Overview of your new ThinkPad computer

Your ThinkPad at a glance .......2
Features..............3
Specifications ............5
Caring for your ThinkPad computer ....6
© Copyright IBM Corp. 2001 1

Your ThinkPad at a glance

Your ThinkPad at a glance
System-status indicators
ThinkPad button
TrackPoint
Computer display
Power-status indicators
Ultrabay 2000
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ThinkPad®A22e Service and Troubleshooting Guide

Features

Processor
®
v Intel v Intel Pentium
Celeron™processor or
®
III processor
Memory
v Built-in: 64 MB v Maximum: 256 MB or 512 MB, depending on the model
Storage device
v 2.5-inch hard disk drive: 15 GB or 30 GB, depending on the model
Display
The color display uses TFT technology:
v Size: 13.3 or 14.1 inch, depending on the model v Resolution:
LCD: Up to 1024-by-768External monitor: Up to 1600-by-1200
v Brightness control
Features
Keyboard
v 84-key, 85-key, or 89-key v TrackPoint
®
v Fn key function v ThinkPad button v Volume control buttons v ThinkLight
Chapter 1. Overview of your new ThinkPad computer 3
Features
Diskette drive
The diskette drive is shipped with some models. To get the best performance from your diskette drives, use high-quality diskettes (such as IBM diskettes) that meet or exceed the following standards:
v 1-MB, 3.5-inch, unformatted diskette:
ANSI (American National Standards Institute) X3.137ISO (International Standards Organization) 8860ECMA (European Computer Manufacturers Association) 100
v 2-MB, 3.5-inch, unformatted diskette:
ANSI X3.171ISO 9529ECMA 125
External interface
v Serial connector (EIA-RS232D) v Parallel connector (IEEE 1284A) v External-monitor connector v PC Card slots for Type I, Type II, or Type III PC Card (only the lower slot is
available for some models)
v Headphone jack v Line-in jack v Microphone jack v Universal Serial Bus (USB) connector v RJ11 telephone connector (available if the modem Mini-PCI Card or the
Combo Mini-PCI Card is installed)
v RJ45 Ethernet connector (available if the Ethernet Mini-PCI Card or the
Combo Mini-PCI Card is installed)
v Ultrabay
2000
v Expansion connector
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ThinkPad®A22e Service and Troubleshooting Guide

Specifications

Specifications
Size
v Width: 304.8 mm (12.0 in.) v Depth: 254.0 mm (10.0 in.) v Height: 35.6 mm (1.4 in.)
Environment
v Maximum altitude without pressurization: 3048 m (10,000 ft) v Temperature
– At altitudes up to 2438 m (8000 ft)
- Operating with no diskette: 5° to 35°C (41° to 95°F)
- Operating with a diskette: 10° to 35°C (50° to 95°F)
- Not operating: 5° to 43°C (41° to 110°F)
– At altitudes above 2438 m (8000 ft)
- Maximum operating temperature, 31.3°C (88° F)
Note: When you charge the battery pack, its temperature must be at least
10°C (50°F).
v Relative humidity:
Operating with no diskette in the drive: 8% to 95%Operating with a diskette in the drive: 8% to 80%
Heat output
v 72 W (246 Btu/hr) maximum
Electrical (ac adapter)
v Sin-wave input at 50 to 60 Hz v Input rating of the ac adapter: 100-240 V ac, 50 to 60 Hz
Battery pack
v Nickel Metal Hydride (NiMH) battery pack, available for some models
Nominal voltage: 8.4 V dcCapacity: 4.5 AH
v Lithium-ion (Li-ion) battery pack
Nominal voltage: 10.8 V dcCapacity: 3.6 AH
Chapter 1. Overview of your new ThinkPad computer 5

Caring for your ThinkPad computer

Caring for your ThinkPad computer
Though your computer is designed to function reliably in normal work environments, you need to use common sense in handling it. By following these important tips, you will get the most use and enjoyment out of your computer.
Important tips:
Be careful about where and how you work
v Do not leave the base of your computer in contact with your lap or any
part of your body for an extended period when the computer is functioning or when the battery is charging. Your computer dissipates some heat during normal operation. This heat is a function of the level of system activity and battery charge level. Extended contact with your body, even through clothing, could cause discomfort or, eventually, a skin burn.
v Place liquids away from your computer to avoid spills, and keep your
computer away from water (to avoid the danger of electrical shock).
v Store packing materials safely out of the reach of children to prevent the
risk of suffocation from plastic bags.
v Keep your computer away from magnets, activated cellular phones,
electrical appliances, or speakers (within 13cm/5 in).
v Avoid subjecting your computer to extreme temperatures (below 5°C/41°F
or above 35°C/95°F).
Be gentle with your computer
v Avoid placing any objects (including paper) between the display and the
keyboard or under the keyboard.
v Do not drop, bump, scratch, twist, hit, vibrate, push or place heavy objects
on your computer, display, or external devices.
v Your computer display is designed to be opened and used at an angle
slightly greater than 90 degrees. Do not open the display beyond 135 degrees, as this might damage the computer hinge.
Carry your computer properly
v Before moving your computer, be sure to remove any media, turn off
attached devices, and disconnect cords and cables.
v Be sure your computer is in standby or hibernation mode, or turned off,
before moving it. This will prevent damage to the hard disk drive and data loss.
v When picking up your open computer, hold it by the bottom. Do not pick
up or hold your computer by the display.
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ThinkPad®A22e Service and Troubleshooting Guide
Caring for your ThinkPad computer
v Use a quality carrying case that provides adequate cushion and protection.
Do not pack your computer in a tightly packed suitcase or bag.
Handle storage media and drives properly
v If your computer comes with a diskette drive, avoid inserting diskettes at
an angle and attaching multiple or loose diskette labels, as these can lodge in the drive.
v If your computer comes with a CD or DVD drive, do not touch the surface
of a CD or the lens on the CD or DVD tray.
v Wait until you hear the CD or DVD click into the center pivot of the CD or
DVD drive before closing the CD or DVD tray
v When installing your hard disk, diskette, CD, or DVD drive, follow the
instructions shipped with your hardware, and apply pressure only where needed on the device. See Access ThinkPad, your on-board help system, for information on replacing your hard disk drive (open Access ThinkPad by pressing the ThinkPad button).
Take care in setting passwords
v Remember your passwords. If you forget a supervisor or hard disk
password, IBM will not reset it, and you may have to replace your system board or hard disk drive.
v If you are an administrator, remember that setting a supervisor password
can prevent unauthorized initialization.
Other important tips
v Your computer modem may use only an analog telephone network, or
public-switched telephone network (PSTN). Do not connect the modem to a PBX (private branch exchange) or any other digital telephone extension line because this could damage your modem. Analog phone lines are often used in homes, while digital phone lines are often used in hotels or office buildings. If you are not sure which kind of phone line you are using, contact your telephone company.
v Your computer might have both an Ethernet connector and a modem
connector. If so, be sure to connect your communication cable to the correct one, so your connector is not damaged. See Access ThinkPad, your on-board help system, for information on the location of these connectors (press the ThinkPad button to open Access ThinkPad).
v Register your ThinkPad products with IBM (refer to the Web page:
www.pc.ibm.com/register). This can help authorities return your computer to you if it is lost or stolen. Registering your computer also enables IBM to notify you about possible technical information and upgrades.
v Only an authorized IBM ThinkPad repair technician should disassemble
and repair your computer.
Chapter 1. Overview of your new ThinkPad computer 7
Caring for your ThinkPad computer
v Do not modify or tape the latches to keep the display open or closed. v Take care not to turn your computer over while the ac adapter is plugged
in. This could break the adapter plug.
v Turn off your computer if you are replacing a device in a device bay, or else
verify that the device is warm- or hot-swappable.
v If you exchange drives in your computer, reinstall the plastic bezel faces (if
supplied).
v Store your external and removable hard disk, diskette, CD, and DVD drives
in the appropriate containers or packaging when they are not being used.
Cleaning your computer
Occasionally clean your computer as follows: v Use a soft cloth moistened with nonalkaline detergent to wipe the exterior
of the computer.
v Avoid spraying cleaner directly on the display or the keyboard. v Gently wipe the display with a dry, soft cloth.
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ThinkPad®A22e Service and Troubleshooting Guide

Chapter 2. Solving computer problems

Diagnosing problems .........10
Troubleshooting...........11
Error messages ..........11
Errors without messages .......13
A password problem ........15
A power switch problem.......15
Keyboard problems ........15
TrackPoint problems ........16
Standby or hibernation problems ....17
Computer screen problems ......21
Battery problems .........22
Hard disk drive problems ......23
Other problems ..........24
Starting BIOS Setup Utility .......25
Recover pre-installed software ......26
Upgrading the hard disk drive ......29
Replacing the battery .........31
© Copyright IBM Corp. 2001 9
Solving computer problems

Diagnosing problems

If you have a problem with your computer, you can test it by using PC-Doctor®for Windows®. To run PC-Doctor for Windows, do as follows:
1. Click Start.
2. Move the cursor to Programs and then to PC-Doctor for Windows.
3. Click PC-Doctor for Windows.
4. Choose either the Quick Test or the Standard Test.
Attention
Running the Quick Test set can take 10 minutes or longer. Make sure you have time to run the entire test; do not interrupt the test while it is running.
The Quick Test set runs many tests of critical hardware components, but it does not run all of the diagnostic tests in PC-Doctor for Windows. If PC-Doctor for Windows reports that all of the tests in the Quick Test set have been run and that it has found no problems, consider running more of the tests.
If you are preparing to contact IBM for support, be sure to print the test log so that you can rapidly provide information to the help technician.
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ThinkPad®A22e Service and Troubleshooting Guide
Solving computer problems

Troubleshooting

If you do not find your problem here, refer to Access ThinkPad, your on-board help system. Open Access ThinkPad by pressing the ThinkPad button. The following section only describes problems that might prevent you from accessing this help system.

Error messages

Note:
1. In the charts, x can be any character.
2. The version of PC-Doctor referred to here is PC-Doctor for
Windows.
Message Cause and action
0175: Bad CRC1, stop POST task
0187: EAIA data access error
0188: Invalid RFID serialization information area or bad CRC2
0189: Invalid RFID configuration information area
0190: Critical low-battery error
0200: Hard disk error The hard disk is not working. Make sure the hard disk drive is attached
021x: Keyboard error Make sure that there are no objects placed on the keyboard, or if you have
The EEPROM checksum is not correct (block #6). Have the computer serviced.
The access to EEPROM has failed. Have the computer serviced.
The EEPROM checksum is not correct (block # 0 and 1, or block # 6). The system board should be replaced, and the box serial number needs to be reinstalled. Have the computer serviced.
The EEPROM checksum is not correct (block # 4 and 5). The system board should be replaced, and the UUID needs to be reinstalled. Have the computer serviced.
The computer turned off, because the battery is low. Connect the ac adapter to the computer and charge the battery pack, or replace the battery pack with a fully charged one.
firmly. Run the BIOS Setup Utility; then make sure the hard disk drive is not disabled in the Startup menu.
one, the external keyboard. Turn off the computer, and turn off all attached devices. Turn on the computer first; then turn on the attached devices. If you still see the same error code, do the following:
If an external keyboard is connected, do the following: v Turn off the computer and disconnect the external keyboard; then turn on
the computer. Make sure that the built-in keyboard operates correctly. If it does, have the external keyboard serviced.
v Make sure that the external keyboard is connected to the correct
connector.
Test the computer, using PC-Doctor. v If the computer stops during the test, have the computer serviced.
Chapter 2. Solving computer problems 11
Solving computer problems
Message Cause and action
0230: Shadow RAM error The shadow RAM failed. Test your computers memory with PC-Doctor. If
you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor.
0231: System RAM error The system RAM failed. Test your computers memory with PC-Doctor. If
you added a memory module just before turning the computer on, reinstall it. Then test the memory with PC-Doctor.
0232: Extended RAM error
0250: System battery error
0251: System CMOS checksum bad
0260: System timer error Have the computer serviced. 0270: Real time clock
error 0271: Date and time error Neither the date nor the time is set in the computer. Set the date and time,
02D0: System cache error The cache is disabled. Have the computer serviced. 02F4: EISA CMOS not
writable 02F5: DMA test failed Have the computer serviced. 02F6: Software NMI
failed 02F7: Fail-safe timer NMI
failed 1801: Attached docking
station is not supported – shut down computer and remove from docking station
The power-on password prompt appears.
The extended RAM failed. Test your computers memory with PC-Doctor. If you increased memory just before turning the computer on, reinstall it. Then test the memory with PC-Doctor.
The backup battery, which is used to preserve the configuration information, such as the date and time, while the computer is turned off, is depleted. Replace the battery and run the IBM BIOS Setup Utility to verify the configuration. If you still have a problem, have the computer serviced.
The system CMOS may have been corrupted by an application program. The computer uses the default settings. Run the BIOS Setup Utility to reconfigure the settings. If you still see the same error code, have the computer serviced.
Have the computer serviced.
using the IBM BIOS Setup Utility.
Have the computer serviced.
Have the computer serviced.
Have the computer serviced.
The computer is attached to a docking station that it does not support. Turn off the computer and detach it from the docking station.
A power-on password or a supervisor password is set. Type the password and press Enter to use the computer. If the power-on password is not accepted, a supervisor password may have been set. Type the supervisor password and press Enter. If you still see the same error message, have the computer serviced.
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ThinkPad®A22e Service and Troubleshooting Guide
Solving computer problems
Message Cause and action
The hard disk password prompt appears.
Hibernation error The system configuration changed between the time your computer entered
Operating system not found.
Fan error The cooling fan has failed. Have the computer serviced. EMM386 Not Installed
Unable to SET Page Frame Base Address
A hard disk password is set. To use the computer, type the password and press Enter. If you still see the same error message, have the computer serviced.
hibernation mode and the time it left this mode, and your computer cannot resume normal operation.
v Restore the system configuration to what it was before your computer
entered hibernation mode.
v If the memory size has been changed, re-create the hibernation file. Verify the following:
v The hard disk drive is correctly installed. v A startable diskette is in the diskette drive
If you still see the same error message, check the boot sequence, using the BIOS Setup Utility.
Edit C:\CONFIG.SYS and change a line from
device=C:\WINDOWS\EMM386.EXE RAM
to
device=C:\WINDOWS\EMM386.EXE NOEMS
UNSUPPPORTED MEMORY CONFIGURATION: Maximum memory size 256MB. Shut down computer and remove extra memory.
CardBus Configuration ErrorDevice Disabled

Errors without messages

Problem: When I turn on the machine, nothing appears on the screen and the machine does not beep while starting up.
Note: If you are not sure whether you heard any beeps, turn off the
and save this file. If this message is issued, the memory module you have installed exceeds
the capacity of your computer. The computer supports a memory size of equal or less than 256MB. Shut down the system and remove the installed Dual Inline Memory Module (DIMM).
Press F1 to go to the IBM BIOS Setup Utility. Press F9 and then Enter to load the default setting.
Press F10 and then Enter to restart the system.
computer; then turn it on again, and listen again. If you are using an external monitor, refer to External monitor problems.
Chapter 2. Solving computer problems 13
Solving computer problems
Solution: If a power-on password is set, press any key to display the power-on password prompt, and then type the correct password and press Enter. If the power-on password prompt does not appear, the brightness level might be set to minimum brightness. Adjust the brightness level by pressing the Fn+Home keys. If the screen still remains blank, make sure that:
v The battery pack is installed correctly. v The ac adapter is connected to the computer and the power cord is plugged
into a working electrical outlet.
v The computer power is on. (Turn on the power switch again for
confirmation.)
If these items are properly set, and the screen remains blank, have the computer serviced.
Problem: When I turn on the machine, nothing appears on the screen, but I hear two or more beeps or a continuous beep while starting up.
Solution: If you are using Ethernet:
v Make sure that the Ethernet cable is connected firmly. v Contact your network administrator.
If the screen is still blank, and the beeps do not stop, have the computer serviced.
Problem: When I turn on the machine, only a white cursor appears on a blank screen.
Solution: Reinstall your operating system, and turn on the computer. If you still see only the cursor on the screen, have the computer serviced.
Problem: My screen goes blank while the computer is on.
Solution: Your screen saver or power management may be enabled. Move the
TrackPoint or press a key to exit the screen saver, or press the power switch to resume from standby or hibernation.
Problem: The DOS full-screen looks smaller.
Solution: If you use a DOS application that supports only 640x480 resolution
(VGA mode), the screen image might look slightly distorted or appear smaller than the display size. This is to maintain compatibility with other DOS applications. To expand the screen image to the same size as the actual screen, start the ThinkPad Configuration Program and click LCD; then select the
Screen expansion function. (The image might still look slightly distorted.)
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ThinkPad®A22e Service and Troubleshooting Guide
Note: If your computer has a screen expansion function, you can use the
Fn+F8 keys to expand the screen image.

A password problem

Problem: I forgot my password.
Solution: If you forget your power-on password, take your computer to an
IBM reseller or marketing representative to have the password canceled.
If you forget your hard disk password, IBM will not reset your password or recover data from the hard disk. You must take your computer to an IBM reseller or an IBM marketing representative to have the hard disk drive replaced. Proof of purchase is required, and an additional charge might be required for the service.
If you forget your supervisor password, IBM will not reset your password. You must take your computer to an IBM reseller or IBM marketing representative to have the system board replaced. Proof of purchase is required, and an additional charge might be required for the service.

A power switch problem

Problem: The system does not respond, and you cannot turn off the computer.
Solving computer problems
Solution: Turn off the computer by pressing and holding the power switch for 4 seconds or more. If the computer is still not reset, remove the ac adapter and the battery.

Keyboard problems

Problem: The cursor does not move after the computer returns from one of the power management modes.
Solution: Make sure you followed the instructions correctly when you installed Windows with the Advanced Power Management (APM) option.
Note: The APM option is not supported in Windows 2000.
Chapter 2. Solving computer problems 15
Solving computer problems
Problem: Some or all of the keys on the keyboard do not work.
Solution: If the problem occurred immediately after the computer returned
from standby mode, enter the power-on password if one has been set.
If an external keyboard is connected to the computer via a ThinkPad Port Replicator, the numeric keypad on your computer does not work. Use the numeric keypad on the external keyboard.
If an external numeric keypad or a mouse is connected to the computer via a ThinkPad Port Replicator:
1. Turn off the computer.
2. Remove the external numeric keypad or the mouse.
3. Turn on the computer and try using the keyboard again.
If the keyboard problem is resolved, carefully reconnect the external numeric keypad, external keyboard, or mouse, making sure that you have seated the connectors properly.
If keys on the keyboard still do not work, have the computer serviced.
Problem: A number appears when you type a letter.
Solution: The numeric lock function is on. To disable it, press and hold Shift;
then press NumLk.
Problem: Some or all of the keys on the external numeric keypad do not work.
Solution: Make sure that the external numeric keypad is correctly connected to the computer by ThinkPad Port Replicator.

TrackPoint problems

Problem: The cursor drifts when the computer is turned on or after it resumes normal operation.
Solution: The cursor might drift when you are not using the TrackPoint during normal operation. This is a normal characteristic of the TrackPoint and is not a defect. Cursor drifting might occur for several seconds under the following conditions:
v When the computer is turned on. v When the computer resumes normal operation. v When the TrackPoint is pressed for a long time. v When the temperature changes.
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ThinkPad®A22e Service and Troubleshooting Guide
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