Macintosh Classic - Horizontal Bars or Stripes Are Displayed; White Dot Is Displayed in Center of Screen; Screen Jitters

Troubleshooting Symptom Charts/Video (Continued) - 4
Video
(Continued)
Horizontal bars or
stripes are displayed
1 Replace power/sweep board.
2 Replace logic board. Retain customer’s SIMMs.
White dot is displayed
in center of screen
1 Verify that yoke cable is connected.
2 Replace power/sweep board.
3 Replace CRT.
Screen jitters 1 Move computer away from adjacent monitors or other
electrical equipment that may cause interference.
2 Replace power/sweep board.