Apple powermac g3 blue.white Service Manual

 Troubleshooting

Symptom Charts/Hard Drive - 50

4 If more than one SCSI device is on the SCSI chain, remove one 

device at a time and retest. Replace the bad drive.

5 Replace internal SCSI data cable to which non-operational 

devices are attached.

6 Reseat the SCSI PCI card. Replace the SCSI PCI card. 

7 Replace power supply.

Works with internal 

or external SCSI 

devices but not with 

both

1 Verify there are no duplicate SCSI device addresses.

2 Reseat SCSI cable connections going to the SCSI card.

3 Replace terminator on external SCSI device.

4 Verify that SCSI device at end of internal SCSI data cable is 

only device terminated.

5 If more than one SCSI device is on the SCSI chain, remove one 

device at a time and retest. Replace the bad drive.

6 Reseat the SCCI card, then try a known-good SCSI card.

7 Replace SCSI drive cables one at a time.

8 Disconnect external SCSI chain. Refer to appropriate manual 

to troubleshoot defective external device.