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Apple lc 520.550.575 Servicehandbuch

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 Troubleshooting
Symptom Charts/Floppy Drive - 8
 
Floppy Drive
 
Audio and video are 
present, but internal 
floppy drive does not 
operate
1 Replace bad disk with known-good disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace floppy drive.
5 Replace chassis harness cable.
Disk ejects; display 
shows icon with 
blinking “X”
1 Replace bad system disk with known-good system disk.
2 Replace floppy drive.
3 Replace logic board. Retain customer’s SIMMs.
4 Replace chassis harness cable.