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Macintosh Classic - Symptom Charts;Miscellaneous

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Troubleshooting Symptom Charts/Miscellaneous - 12
Miscellaneous
Clicking, chirping,
or thumping sound
1 Verify that logic board power cable is connected at J12 on
logic board.
2 Replace power/sweep board.
3 Replace logic board. Retain customer’s SIMMs.
Smoke/odor Replace power/sweep board.
No video, no audio, and
no drive operation
1 Connect power cord.
2 Switch power on.
3 Replace power cord.
4 Replace fuse.
5 Replace power/sweep board.
6 Replace logic board. Retain customer’s SIMMs.

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