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Troubleshooting Symptom Charts/Miscellaneous - 18
Miscellaneous
Picture dim;
adjusting front panel
controls does not
increase brightness
1 Ensure that screen does not face a window or other source of
ambient light. This type of environment gives screen a dim
appearance.
2 Replace CRT/video board.
Picture has vertical
jitter
1 Move monitor to different location and see if symptom
persists.
Note:
This symptom is often caused by electromagnetic
interference (electronic devices, fluorescent lights, power
lines, etc.) Refer to “First Checklist” in this chapter.
2 Replace main deflection board.