DEC Digital HiNote Ultra 2000 series, Service Quick Reference Manual

Page: 83 / 131

Troubleshooting
4-10
External Keyboard or PS/2 Mouse Failure
Problem Troubleshooting Procedure
The notebook
computer’s power is on,
and the keyboard is
working. One of the
following conditions
occurs:
•
Pressing keys on
the external
keyboard has no
effect.
•
Pressing the key
on the external
keyboard gives
incorrect
characters.
•
The mouse cursor
on the screen
doesn’t move in
conjunction with
the external
mouse.
•
Make sure that the external
mouse or keyboard’s connection
to the notebook computer’s PS/2
mini-DIN connector is secure.
•
Make sure the mouse trackball
and postion sensors are clean and
free of dust.
•
Replace the external mouse or
keyboard and try again.
•
If the system still doesn’t work,
test the mini-DIN keyboard circuit.
•
If incorrect characters are
displayed, check the
COUNTRY.SYS settings in DOS
to see if an incorrect language is
being used by the system.