Digital Equipment 3100R Series, Service Maintenance Manual

Page: 72 / 174

Troubleshooting
4-24
Monitor Troubleshooting
Problem Possible Cause Action
Monitor power indicator is
not on. Monitor is turned off.
Power cord is not
connected.
No power at wall outlet.
Power indicator is
defective.
Turn on the monitor.
Connect the power cord to the
server.
Use another outlet.
Replace the monitor.
No screen display. Configuration error.
Monitor brightness and
contrast controls are
incorrectly set.
Monitor has failed.
Run the SCU to configure the
server for video operation.
Adjust the monitor brightness and
contrast controls.
Replace monitor.
Distorted, rolling, or
flickering screen display, or
wrong/uneven color. Monitor incorrectly
adjusted.
Monitor signal cable
incorrectly installed.
Adjust accordingly.
Straighten any bent connector pins
and then reconnect.
Color monitor displaying
monochrome. Server was turned on
before the monitor was
turned on. Turn off the server, turn on the
monitor, then turn the server back
on.
Monitor fails to switch to
high-resolution mode. Appropriate high-resolution
video drivers are not
installed or incorrectly
installed. Correctly install all appropriate high-
resolution video drivers. Refer to
the documentation supplied with the
monitor.