NEC POWERMATE VP Manual page 198

PROBLEM
A distorted image appears
on your monitor screen.
There is constant movement on
the screen or the screen display
is fuzzy.
Distortion or discoloration in the
graphics characters appear on the
screen.
Keyboard Problems
An image appears on the screen
but nothing happens when you
use the keyboard.
System Performance Problems
System performance appears
sluggish.
8-4 Solving Problems
Troubleshooting
CORRECTIVE ACTION
Adjust the video controls on your monitor. If
this doesn't help, turn the monitor off for a few
seconds, then turn it back on.
A magnetic field is affecting your monitor. If
you have another monitor nearby, or other
device with a motor that generates a
magnetic field (for example, a fan), move
the monitor or device away from the
affected monitor.
Check that your monitor is set up correctly.
Check the monitor connections. Make sure
that the monitor signal connector pins are
not damaged. Be sure that the correct video
driver is installed.
Check and tighten the keyboard cable
connection. Move the mouse to make sure
the system is not waiting for a mouse
response. Check the disk light to make sure
a program is not loading.
If this doesn't help, power off the system.
Wait 5 seconds and power on the system.
Check that you have your system set for
optimal operation. If you have had your
system for a while, try defragmenting the hard
disk drive. See your Microsoft Windows and
MS-DOS documentation.
Check the memory requirements of your
software applications. If required, install
additional memory (see "SIMM Upgrade
Kits" in Chapter 6, Options).