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Apple classic ii.performa 200 Servicehandbuch

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 Troubleshooting
Symptom Charts/Hard Drives - 8
 
Hard Drives
 
Internal or external 
hard drive does not 
operate
1 Verify that SCSI loopback card is not attached.
2 Check that internal SCSI terminator is positioned in 
connector properly.
3 Verify that internal hard drive has all three terminating 
resistor packs on circuit board.
4 Replace hard drive data cable.
5 Replace hard drive.
6 Replace logic board. Retain customer’s SIMMs.
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 Verify that terminator is installed on internal SCSI drive.
4 Replace SCSI select cable.