Troubleshooting The Problem - DEC VR297 User Manual

1.2 Troubleshooting the Problem

This section provides flowcharts for troubleshooting different types of
monitor problems. The flowcharts make two assumptions:
• If FRUs were replaced, the correct procedures in Chapter 3 were
followed.
• Adjustment procedures were performed as necessary.
Problems may come from two sources—your host system or your monitor.
Types of Problems
The following flowcharts cover seven types of monitor problems:
If you have this problem . . .
A blank screen, no video or raster
Incorrect color display problems
Purity problems
Misconvergence
Geometric distortion
Excess luminance
Bright area at left margin
NOTE
If you replace a video amplifier module, deflection module, or the
power supply, perform all the necessary adjustments (Chapter 2).
Troubleshooting
See this section . . .
1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
3