Here's a new one... I got my new ROMs in the mail today and installed them. L-6 for the CPU and matching sound ROM set.
Seemed to go fine and game comes back up and plays like you would expect. Until I won a free game and the knocker fired and the game reset.
Huh?
And it was repeatable. Started a new game, got to a replay, knocker fires and the game resets.
Ok, check things out, cables and connectors look fine. Nothing seems to have been bumped while I was in the backbox. I also check the knocker during test mode and it actually caused the game to reset then too.
So I disconnect the knocker and test it and it doesn't reset the game. I start a new game and get a replay and it doesn't reset (it said I got the replay, but no knocker going off as the wires are disconnected).
Ok, so I play a few more games and then at one point early in a game, it resets while I had the ball in among the pop bumpers. Ugh.
So next up I take a "no more resets" gadget I had and installed it. Also plugged the knocker back in. Played a game, got a replay and the game reset when the knocker fired.
Hmmm... any thoughts on what to check? The game never did any of this with the previous ROMs... which were P-4, so an early prototype version I guess.