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Apple macintosh ii.iix.iifx Service Manual

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 Troubleshooting
Symptom Charts/Floppy Drive - 10
 
Floppy Drive
 
Internal floppy drive 
runs continuously
1 Replace bad disk.
2 Replace internal floppy drive cable.
3 Replace internal floppy drive.
4 Replace logic board. Retain customer’s SIMMs.
Audio and video are 
present, but one 
internal floppy drive 
does not operate
1 Replace bad disk.
2 Verify that all external SCSI devices are disconnected.
3 Replace internal floppy drive cable.
4 Replace internal floppy drive.
5 Replace logic board. Retain customer’s SIMMs.
6 Replace power supply.