2x problems: I don't have a replacement SCSI chip, neither do I have a hot air rework station for removing the old chip and fitting a new one.

I really can't afford this kind of equipment for doing an occasional job, I whiched I could...

Do you have the right equipment and spare SCSI chips ? If so PM me what you would ask to replace the SCSI chip but I'm not convinced 100% that its the cause of my problems. I have never seen something so weird like this.

I have a 2nd SE/30 board with no SCSI at all but haven't tested the traces of the SCSI chip yet, I'm going to try that in the weekend.