So all I know is to ask the normal questions people do, did you test the fuses out of the machine, and do the leds change when you have the coin door closed. Sorry all I know is the basics for this one. I hate when I do something silly and make a good game fail, but always always find a solution.

My opinion absolutely not never had one test good in a machine but bad outside of it, but your going to get the question its also a good way to make sure for the real person that can help that your testing using a meter not just eyes, or LED state, or your that exception that proves me wrong. These are small fuses if I recall so perhaps this will be the one thread that makes me a believer in testing out of the game.

So a good chunk of those are coming off J102 if I recall correctly this game has a quick disconnect plug system in the back. Why don't you trace that plug all the way to the playfield unplug replug and see if behavior changes. I would also check the Driver Board but I suspect something came undone in the back when you were working on it.

You have a great point, I just was trying to think what would interrupt power on that many shared inputs but my idea is not logical. My terrible idea is a free bump for better eyes!