i had the same issue but did not get lucky. have 486-2 when I fired it up and thats it aside from the gi. if i power down and back up it seems to work but all memory gets erased. batteries are new. holder is new. i changed #31 to 01 but i think i have to power it down to save the settings? not 100% sure on that. seems to add credit and do whacky stuff with ball in play too i have an kohout mpu here but its outfitted for black knight. have a message into them about that. i havent dug into the boards but it looks like the 40 pin connectors have been replaced. two upper rollovers arent working and the drops are terrible. just cleaned the middle bank and it at least works now but its still sluggy. i have all new wpc flipper assys on hand for when I get to that point but first things first. also have some major cupping on the larger round inserts. I will need to replace those. fun fun!