Ultranav Problems - IBM ThinkPad R50 Series Service And Troubleshooting Manual

Solving computer problems
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
Some or all of the keys on the external keyboard do not work.
Solution
If you are using the ThinkPad Dock II, the ThinkPad Mini Dock, or the
ThinkPad Port Replicator II, make sure that the keyboard cable is correctly
connected to the keyboard 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.

UltraNav 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. Pointer drifting might occur for several seconds under the
following conditions:
Problem:
The mouse or the pointing device does not work.
Solution:
Make sure that the TrackPoint is enabled in the ThinkPad Configuration
Program, and then try using the TrackPoint. If the TrackPoint works, the
error might be due to the mouse.
Make sure that the mouse or pointing-device cable is securely connected to
the ThinkPad Dock II, the ThinkPad Mini Dock, or the ThinkPad Port
Replicator II.
If your mouse is incompatible with the IBM PS/2 mouse, disable the
TrackPoint, using the ThinkPad Configuration Program.
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ThinkPad R50 Series Service and Troubleshooting Guide
When the computer is turned on.
When the computer resumes normal operation.
When the TrackPoint is pressed for a long time.
When the temperature changes.