Apple Mac 5260/100 - Manual (Page 53)

Troubleshooting Symptom Charts/Video - 8
Video
Screen is black, too
dark, or too bright;
audio and drive
operate
1 Adjust contrast button on front bezel.
2 Adjust brightness. Use Screen control panel.
3 Check yoke cable connection.
4 Perform video adjustments. Refer to “Video” in
Adjustments chapter.
5 Replace analog/video board assembly.
6 Replace power supply board.
7 Replace CRT.
Screen is bright and
audio is present, but
no video information
is visible
1 Perform video adjustments. Refer to “Video” in
Adjustments chapter.
2 Replace analog/video board assembly.