Lenovo THINKPAD X41 - Manual (Page 44)

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 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.
Problem:
All or some keys on the external PS/2 keyboard do not work.
Solution:
If you are using the X4 Dock, connect the keyboard connector to the
keyboard/mouse connector on the X4 Dock. If you use a mouse and an
external keyboard simultaneously, you need the keyboard/mouse
connector. Make sure that keyboard/mouse connector is correctly
connected to the mouse connector of the X4 Dock, and that the keyboard
cable is correctly connected to the keyboard connector of the
keyboard/mouse connector.
If the connection is correct, disconnect the cable and make sure that the
built-in keyboard operates properly. If the built-in keyboard works, there is
a problem with the external keyboard. Try using a different external
keyboard.
TrackPoint problems
Problem:
The pointer drifts when the computer is turned on or after it resumes
normal operation.
Solution:
The pointer 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. The pointer drifts 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.
Problem:
The mouse or the pointing device does not work.
Solving computer problems
20 ThinkPad ® X41 Tablet Service and Troubleshooting Guide