Ckeck the Eary Startup Control under Expansion Broard Diagnostic look for the following Manufacturer & Product IDs.
2017 / 11 for the SCSI & 2017 / 10 for the RAM
If Status for both show as Working is your hard drive Working?
Try another hard drive if you can.
Have you checked the SCSI ID Nos of all the drives on the card?
Hope this helps Steve
