NEC POWERMATE 8100 Series, Service And Reference Manual

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8-10 Troubleshooting
Problems and Solutions
Problem Symptom Solution
Monitor malfunction
(cont’d) Blank display. 1. Press any key or move the mouse to
ensure power management has not blanked
the display.
2. Check that the monitor power ON/OFF
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 graphics board.
7. Replace graphics board.
8. Replace monitor.
CD-ROM drive
malfunction System power not on. 1. Turn system power on.
Disc tray does not open. 1. System power not on. Turn system
power on.
2. System power failed. Insert the tip of a
straightened paper clip into the emergency
eject hole, then gently press inward until the
tray opens.
No sound from CDs. 1. Check that speaker power is on and
volume is adjusted.
2. Check audio software settings.
3. Check the CD.
4. Check the CD-ROM drive audio cable
connections.
5. Check the CD-ROM drive audio cable.
Replace as necessary.
6. Replace the CD-ROM drive.
7. Replace the optional sound board.
8. Replace the system board.