NEC POWERMATE PROFESSIONAL - SERVICE MANUAL 05-1997 Service Manual page 147

Problem Symptom
Monitor Unable to synchronize
malfunction display.
Wavy display.
Blank display.
CD-ROM Disc tray does not open.
Malfunction
Table 4-4 Problems and Solutions
Maintenance and Troubleshooting
Solution
1. Adjust the monitor's synchronization
controls.
2. Check that the monitor's resolution
matches the video setting or the video
driver used (see Section 1).
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 video board and video
RAM.
1. Check that the computer and monitor
are not near motors or electric fields.
1. Press any key or move mouse to
ensure power management has not
blanked the display
2. Check that the VGA connector is
attached to the video board at the rear of
the system.
3. Check that the monitor power ON/OFF
switch is ON.
4. Check cable connections between the
AC power supply and monitor.
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 video board.
8. Replace monitor.
1. Check that the system power is on.
2. System power failed. Insert a paper clip
into the emergency eject hole and press
inward to open the tray.
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