Apple 577 用户手册
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Troubleshooting
Symptom Charts/Miscellaneous - 16
Miscellaneous
Clicking, chirping,
or thumping sound
1 Replace analog board.
2 Replace logic board. Retain customer’s SIMMs.
Smoke/odor
Replace analog board.
No video, no audio, and
no drive operation
1 Connect power cord.
2 Switch power on.
3 Replace power cord.
4 Replace analog board.
5 Replace logic board. Retain customer’s SIMMs.
“Sad Macintosh” icon
1 Replace bad disk with known-good disk.
2 Replace RAM SIMMs on logic board.
3 Replace logic board. Retain customer’s SIMMs.