Digital Equipment Celebris FX, Service Maintenance Manual

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Troubleshooting
4-8
Problem Possible Cause Action
Power is on, screen is on,
but the comptuer does not
respond. Keyboard not connected,
mouse not connected, or
both might be in the wrong
port. Connect the keyboard and/or
mouse. If already connected,
confirm that each device is in the
appropriate port.
Power is on, but there is no
screen display. Brightness and contrast
controls are not correctly
set. Adjust the brightness and contrast
controls.
The monitor-off timer has
shut the monitor off. Press [Shift] to reactivate monitor.
Monitor is off. Turn on the monitor.
Monitor cable is incorrectly
installed. Check all monitor connections.
Incorrect video drivers
installed. Install the correct video drivers.
Video controller has failed. For models with S3 video, replace
the main logic board. For Celebris
FX models with Matrox video card,
replace the Matrox video card.
Matrox video card not
seated properly. For those Celebris FX models with
a Matrox video card, reseat the
Matrox video card.
Monitor has failed. To ensure the problem is a monitor
failure, if possible, try another
monitor. If the new monitor fails to
operate, follow the CRU Process to
replace the monitor.
continued