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.
Solution: Turn off the computer by pressing and holding the power switch for
4 seconds or more. If the system 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.
Problem: Some or all 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 any is set.
If an external keyboard is connected, 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:
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 any 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: All or some keys on the external numeric keypad do not work.
Solution: Make sure that the external numeric keypad is correctly connected
to the computer.
Solving computer problems
16 ThinkPad
®
T22 Service and Troubleshooting Guide
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