User`s guide

Troubleshooting Symptom Charts/Screen Color - 6
Screen Color
Screen is one
predominant color
1 Verify that CRT/video board is properly seated on CRT socket.
2 Using Monitors & Sound control panel, click Recalibrate
button (see the Adjustments chapter).
3 If you have AppleVision software 1.5.2 or earlier, run the
AppleVision Recovery Utility (see “AppleVision Recovery
Utility for Malfunction During Startup or Recalibration” in
this chapter). If you have Apple Display software 1.5.3 or
later, refer to the first Important note in the section
“AppleVision Recovery Utility for Malfunction During
Startup or Recalibration” in this chapter.
4 Replace CRT/video board only if the service strategy in your
region supports CRT/video board replacement.
5 US only: Call Apple Technical Support at 1-800-919-2775.
Screen has color
rainbow effect
(bands of color
across the screen)
1 Use a manual degaussing coil to degauss the screen. (You can
purchase a degaussing coil for about $25 at most larger
electronic parts stores.)
2 Replace main deflection board. Then adjust the display (see
“Adjusting the Display after Replacing the Main Deflection
Board” in this chapter).
3 Replace CRT/video board only if the service strategy in your
region supports CRT/video board replacement.
4 US only: Call Apple Technical Support at 1-800-919-2775.
Screen Brightness
Screen is very bright
(monitor might shut
down)
1 If possible, from the Monitors & Sound control panel, click
Recalibrate button.
2 If you have AppleVision software 1.5.2 or earlier, run the
AppleVision Recovery Utility (see “AppleVision Recovery
Utility for Malfunction During Startup or Recalibration” in
this chapter). If you have Apple Display software 1.5.3 or
later, refer to the first Important note in the section
“AppleVision Recovery Utility for Malfunction During
Startup or Recalibration” in this chapter.
3 Replace main deflection board. Then adjust the display (see
“Adjusting the Display after Replacing the Main Deflection
Board” in this chapter).
4 Replace CRT/video board only if the service strategy in your
region supports CRT/video board replacement.
5 US only: Call Apple Technical Support at 1-800-919-2775.