Gents,
I'm late to the party, but I agree with Trag and Uniserver that this is most likely a bad via or trace (I'm betting on the former). When my SE/30 went out I created a schematic tracing each of the SCSI pins back to at least one other chip. Eventually I discovered a bad via located near one of the failed capacitors. I had to make a solder bridge to restore the connection. It may be too late for this effort (and you may have already discovered a better schematic), but I'm happy to share the schematic that I created. Unfortunately I don't log in enough to see the requests in a timely fashion. If someone else that is more active will volunteer to take it on I'll forward the drawing.
I'm late to the party, but I agree with Trag and Uniserver that this is most likely a bad via or trace (I'm betting on the former). When my SE/30 went out I created a schematic tracing each of the SCSI pins back to at least one other chip. Eventually I discovered a bad via located near one of the failed capacitors. I had to make a solder bridge to restore the connection. It may be too late for this effort (and you may have already discovered a better schematic), but I'm happy to share the schematic that I created. Unfortunately I don't log in enough to see the requests in a timely fashion. If someone else that is more active will volunteer to take it on I'll forward the drawing.