Technical data

Troubleshooting
3–4
Digital HiNote VP 500 Service Guide
CRT Failure
Problem
Troubleshooting Procedure
The Notebook has power, the Notebook’s LCD
panel is working and one of the following
conditions apply:
The Notebook’s LCD panel is working.
There is no display on the CRT.
The color of the CRT is wrong.
There is a display, but the display is not
stable.
Make sure the CRT output is enabled.
Make sure that the CRT’s power is on.
Make sure that the CRT’s power cables are
securely connected, and that there are no
bent or damaged pins on the connectors.
Make sure that the CRT to Notebook cable
connection is secure. Check the CRT port
on the Notebook to make sure the
connection is secure, and that there are no
damaged pins or connectors.
If the CRT still doesn’t work, change to a
different CRT and try again.
If the color is bad, adjust the Monitor’s
color controls (if any).
Notebook Keyboard Failure
Problem
Troubleshooting Procedure
The Notebook is fully powered-on. However,
when pressing on the keyboard, one of the
following events occurs:
Pressing on the key doesn’t have any effect.
Incorrect characters are displayed on the
screen.
One stroke of a key produces too many
characters on the screen.
Make sure that the keyboard cable is
securely connected into the keyboard
con
nector.
Check the keyboard circuit.
Replace the keyboard and check again.
If incorrect characters are displayed, check
the COUNTRY.SYS settings in the
operating system to see if an incorrect
language is being used by the system.
Replace the keyboard controller BIOS chip
located in the memory compartment on the
bottom of the system unit.
External Keyboard or PS/2 Mouse Failure
Problem
Troubleshooting Procedure
The Notebook’s power is on, and the keyboard
is working. One of the following conditions
occur:
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’s
PS/2 mini-DIN connector is secure.
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.