Apple M4753 manual Symptom Charts, Startup

Models: M4753

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Troubleshooting

Symptom Charts/Startup - 2

 

 

 

Symptom Charts

RAM failure occurs (breaking glass sound after startup chord)

Startup

1Remove top RAM SO DIMM (if present) and restart computer. If startup sequence is normal, replace RAM SO DIMM and retest.

2Replace bottom RAM SO DIMM and retest.

3Replace microprocessor board.

4Replace I/O logic board.

Page 59
Image 59
Apple M4753 manual Symptom Charts, Startup