TERMPWR checks out good (+5V) on both the internal and external SCSI connectors. I actually checked it at each of the inductors first and finally at the connectors themselves. I can't verify power at the IC due to the short cable connecting the logic board to the computer, but I'm beginning to suspect the problem is the hard drive. I plan to buy an internal SCSI terminator to install on the logic board to see if that cures the problem. I have an external Zip SCSI drive that I can test the bus with once I can terminate the internal bus. Anyone have a better suggestion or alternate path I should be investigating?