I've got to say, a washing machine controller board question is a rarity in my experience.
I've
never thought mixing digital electronics and wet, humid conditions as wise. I continue to buy appliances of the sort with good old twisty knob analog controls.
That said, my best guess is a total replacement of the controller board, if it is even available, sounds like the ticket.
I think I see a kindred spirit in your husband though, i.e., I can't stop myself from trying to repair even the most lost of "lost causes", but since you'll be without a clothes washer for the duration of such a fix, I'm not sure that route is best.
In order to look for replacement parts for the washer, try googling its
Model #, generally found on a metal tab attached somewhere on the back of the machine.
You might also try
This spares site. They have a "parts enquiry page" selection.