My TSPP is not ending a game properly and other issues...
I just put in a new ROM for my Simpsons from Marco and I'm thinking that's gotta be what caused one issue. The old rom worked fine when it came to the game ending, ball drained and the game would end. Now, it drains and nothing happens at all. All rollover switches in the through check fine so I'm thinking maybe the new game rom has something messed up in the code???? I'd usually email and ask John Wort about it since I bought a ton of roms from him in the past but I guess he's not active anymore. Hopefully someone on here can help out!

I'd just put the old game rom back in and check it but I bought a GQ-4X4 rom burner and a UV eraser and don't know how to use the burner yet!! The UV eraser works great!! (Hence no working old game rom Dab Nabbitt!!!)

The reason I bought a new rom was to try and fix a freeze issue. After about a minute or so playing the game, the TV glitches and the 20V power doesn't work for like 30 seconds, then it comes back and everything is just fine.
Any ideas on what may be causing it to do this would be appreciated!
Also, any help using a GQ-4X4 rom burner would be great as well!
Thanks in advance

Yeah, checked them, all rollover switches check fine in the switch test including the optos for the first ball and the VuK up position opto. Thinkin it’s gotta be the programming in the chip not programmed to recognize a ball drain. IDK though... not real familiar with chips yet!
Thanks for the suggestion!

I do, messed with my rom burner and burnt a new CPU for it and I'm having the same issue.... There wasn't a harness for the coin door when I got the game and I didn't mess with wiring up everything. I only wired up the start button, coin door buttons, flipper buttons, and coin door switch. I'm not thinking it's the rom now, I think it's gotta be in the wiring.
I'm going to wire up the coin switches and whatever else isn't connected and see what happens.

Right now, the ball will drain during gameplay and move to ball 2 and 3 then game over like normal. In multi-ball though, the ball save light stays flashing the entire time and when the ball drains it doesn't kick it back out. So, when all 3 balls drain, they don't return to the playfield and the DMD and game scores like you're still in multiball… Why will it now recognize a ball drain, but not in multi-ball???
Not sure why, I'm just going to wire everything up 100% and hopefully the ghosts in this machine disappear. Thanks for the help so far guys!

Thank you everyone for your suggestions. Issue resolved!!
I wired up the remaining few things into my homemade harness and it took care of it.
It ended up being the "Memory Protect" switch on the coin door. For some reason the ground wire was not connected to anything...
I put a connector on it and screwed it to the ground cable and everything works fine now.
When you open the coin door now, it reads on the DMD that coin door is open and voltage is off like my other sterns.
Thanks again for the suggestions!

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