Apple Power Macintosh 7100/80AV - Manual (Page 46)

Troubleshooting Symptom Charts/Hard Drive - 12
Hard Drive
Internal hard drive
runs continuously
1 Update driver software of hard drive using HD-SC Setup.
2 Reinstall system software.
3 Replace SCSI data cable.
4 Replace internal hard drive.
5 Replace logic board. Retain customer’s SIMMs.
Internal hard drive
does not operate
1 Replace SCSI data cable.
2 Replace SCSI power cable.
3 Replace hard drive.
4 Replace logic board. Retain customer’s SIMMs.