NEC PowerMate Pro150 Series Service Manual page 114

Problem Symptom
Monitor Wavy display.
malfunction
(cont'd)
Blank display.
CD-ROM Disc tray does not open.
Malfunction
Cannot access CD-ROM
reader.
Table 4-4 Problems and Solutions
Maintenance and Troubleshooting
Solution
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 jewelers
screwdriver into the emergency eject hole
and turn counterclockwise to open the
tray, clockwise to close the tray.
1. Check signal/power connections
between reader, PCB, power supply.
2. Check master/slave settings.
3. Check power supply.
4. Check IDE cable. Replace as
necessary.
5. Replace system board.
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