Monitor Troubleshooting Procedures - Digital Equipment VAXstation 3100 Maintenance Manual

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Troubleshooting
2.23 Monitor Troubleshooting Procedures
Table 2-17 lists some symptoms of common problems with the monitors.
When ttoubleshooting a monitor, follow the suggested corrective actions in
the order listed.
Table 2-17 Monitor Troubleshooting Table
Symptom
No LED; no raster
Compressed raster; no video
display
Raster; no video display
No LED, but good video
display
Corrective Action
Check the power cord connection.
Check the
120/240
Vac setting.
Check the fuse.
Refer to the monitor's pocket service guide.
Make sure the monitor cable is connected between
the system and the monitor.
Make sure the correct cable is used.
BC18P- er-BG2- 3K
when a graphics module-is
not installed.
BC19S
or
BC23J-03
when a graphics module is
installed.
Adjust the contrast and brightness.
Run TEST F on the system if no graphics module
is installed. Run TEST 4 if graphics module is
installed. If a failure is indicated, replace the
graphics module or the system module in the system
box before proceeding with troubleshooting the
monitor.
Refer to the monitor's pocket service guide.
Adjust the contrast and brightness.
Run TEST F on the system if no graphics module
is installed. Run TEST 4 if graphics module is
installed. If a failure is indicated, replace the
graphics module or the system module in the system
box before proceeding with troubleshooting the
monitor.
Refer to the monitor's pocket service guide.
Refer to the monitor's pocket service guide and
replace the LED assembly.