PlasmaBomb
Lifer
Bane likes to nef a lot...
I'd offer some guesses to help you troubleshoot, Indy, but my usual approaches are a couple decades removed.
Which brings me to the amusing notion that my parents will never end up playing the whole "meet the boyfriend" routine.
Why is that?
Well, the only options are to move the ROM to the motherboard and test. I wish I had another to use because I don't want to remove the existing one from the switcher board. It is a PITA. I emailed a guy with an Amiga shop and asked if he had a spare he could sell me. Hopefully he does.
Otherwise, I will just have to put the board up for sale. 🙁