IBM ThinkPad X22 Service & Troubleshooting Manual page 32

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.
Problem: All or some keys on the external keyboard do not work.
Solution: To use an external keyboard, you need to attach the
keyboard/mouse cable or dock the ThinkPad Dock to the computer. Make
sure that:
v
The keyboard/mouse cable is correctly connected to the computer.
v The keyboard cable is connected to the correct side of the keyboard/mouse
cable or the ThinkPad Dock.
If these connections are correct, disconnect the keyboard/mouse cable from
the computer and make sure that the keyboard operates properly. If the
built-in keyboard works, there is a problem with either the cable or the
keyboard. Try using a different keyboard/mouse cable or external keyboard.
Standby or hibernation problems
Problem: The computer enters standby mode automatically.
Solution: If the processor reaches a temperature that is too high, the computer
automatically enters standby mode to allow the computer to cool and to
protect the processor and other internal components.
Problem: The computer enters standby mode immediately after POST (the
standby indicator turns on).
Solution: Make sure that:
v The battery pack is charged.
v The operating temperature is within the acceptable range. Refer to
Appendix A, "Features and specifications."
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ThinkPad X22 Service & Troubleshooting Guide