Specifications

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 With Apple Display software (version 1.5.3 or later)
installed, start up the computer and hold down the keys
command-option-a-v until you hear a system alert or the
screen image is restored.
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 With Apple Display software (version 1.5.3 or later)
installed, start up the computer and hold down the keys
command-option-a-v until you hear a system alert or the
screen image is restored.
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.