NEC DIRECTION L Service Manual page 75

4-8 Maintenance and Troubleshooting
Problem
Monitor
malfunction
Table 4-2 Problems and Solutions
Symptom
Unable to synchronize display.
Wavy display.
Blank display.
Solution
1. Adjust the monitor's synchronization
controls.
2. Check that the monitor's resolution
matches the video setting or the video
driver used.
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 controller
and memory.
1. Check that the computer and monitor
are not near motors or electric fields.
1. Press any key or move the mouse to
ensure power management has not
blanked the display.
2. Check that the monitor power switch
is on.
3. Check that the monitor cable is
attached to the video connector at the
back of the system.
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.
7. Replace system board.
8. Replace monitor.