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Apple color classic ii.perf 275 Manual Do Serviço

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 Troubleshooting
Symptom Charts/Hard Drives - 12
 
Hard Drives
 
Internal or external 
hard drive does not 
operate
1 Verify that SCSI loopback card is not attached.
2 Verify that internal hard drive has all three terminating 
resistor packs on circuit board.
3 Verify that external drive is properly terminated.
4 Replace hard drive.
5 Replace logic board. Retain customer’s SIMMs, math 
coprocessor, and PDS card.
6 Replace hard drive data cable. See “Flat-Cable Assembly” in 
Take Apart.
Works with internal 
or external SCSI 
device but does not 
work with both
1 Verify that SCSI device ID switch setting on external device 
is higher than 0. Also verify that ID switch setting on 
external SCSI device does not duplicate ID switch settings on 
any other attached external SCSI devices.
2 Replace terminator on external SCSI device.
3 Replace SCSI select cable.