Troubleshooting and Repair 4-13
Table Section 4-3 Problems and Solutions
Problem
Symptom
Solution
Monitor malfunction
Unable to synchronize display.
1
. Adjust the monitor's synchronization
knobs.
2
. Check that the monitor's resolution
matches the video setting or the video
driver used (see Section 1). The NEC
SVGA Monitor supports up to 1024 x
768. Most monitors don't support
resolutions above 640 x 480 (VGA
monitors).
3
. Check that the utility is not selecting
a refresh rate/resolution that is not
supported by the monitor.
4
. Check that the driver used matches
the capabilities of the built-in video
controller and DRAM.
Wavy display.
1
. Check that the computer and
monitor are not near motors or electric
fields.
Blank display.
1
. Check that the built-in VGA is
enabled(see Section 2).
2
. Check that the monitor power
ON/OFF switch is ON.
3
. Check cable connections between
the AC power supply and monitor.
4
. Be sure the system has completely
booted. Depending on the amount of
installed memory, monitors may take
as long as 22 seconds before any
characters can appear on the screen.
5
. Adjust brightness and contrast
controls on the monitor.
6
. Check cable connections between
the monitor connector and the system
board (or optional video board).
7
. Replace system board.
8
. Replace monitor.