NEC POWERMATE ES 5200 - SERVICE, Service Manual

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8-10 Troubleshooting
Problems and Solutions
Problem Symptom Solution
Monitor malfunction,
cont’d Unable to synchronize display. 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 2).
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.
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.