well... I've got a revision 2.2 that also won't boot with a drive attached. Kind of a a bummer as I was in the proccess of installing an AD516 audio card and wanted the audio drive on the Fastlane SCSI II controller. Tried a few different HDs on the internal scsi header.
Can ya help me out here Damion? What is needed to "fix" the situation? Some soldering of wires and new rom? The chip you listed as 27C256 is marked also with -15/L 9346 CHA on the board in my A3000. Unlike the ones pictured on the Amiga Hardware Database marked 9402 CHA.
Many thanks in advance.