I am truly stumped and looking for ideas. I have a Williams Indiana Jones. When I got it the switch matrix was bad so I swapped out MPU board. All works except Path of Adventure. When I look at connections going into the 16657 board I find 13 volt going in and I can touch column to rows and get 94 and 95 switches to register. However 16657 board opts will not register at all. I ordered a new 16657 board from Pinball wizard. Board is hard to find it seems to be out of stock everywhere. Anyway I got new board and still opts not registering. Do I have two bad boards or is there something I might be missing. Looking for ideas