Calgary, AB
losing scores is odd. First thing you want to do is validate your voltages. You could start with the 5v on the power board. Not sure if it has test points that you can use. There's lots of great information on site if you search. I found a thread here: https://pinside.com/pinball/forum/topic/tspp-resetting-issues
Also low 5 volt can also affect your dmd. Good luck
Also - visually inspect your power board for issues. If you are comfortable you can also disconnect and pull out your board, again looking for visual queues on the back that would indicate something going on. Make sure you test voltages first (before you pull out anything) and be careful!
Buffalo, NY
