Macintosh Classic - Screen Is Dark; Fan Is Not Running; Single Vertical Line Is Displayed; Single Horizontal Line Is Displayed; Vertical Bars or Stripes Are Displayed

Troubleshooting Symptom Charts/Video (Continued) - 3
Video
(Continued)
Screen is dark; fan is
not running
Replace power/sweep board.
Single vertical line is
displayed
1 Replace power/sweep board.
2 Replace logic board. Retain customer’s SIMMs.
3 Replace CRT.
Single horizontal line
is displayed
1 Replace power/sweep board.
2 Replace logic board. Retain customer’s SIMMs.
3 Replace CRT.
Vertical bars or
stripes are displayed
1 Replace power/sweep board.
2 Replace logic board. Retain customer’s SIMMs.