Hi all. So I bought pinbot in June (my first pin!). At the time of purchasing it, when you depressed the flipper buttons, the flippers would just flip up and down repeatedly, and the guy I bought it from said he thought a flipper rebuild would fix the issue. I also noticed that after a time the flippers would lose power altogether and he said it was probably an issue with the flipper power supply board.
Since I purchased the game, I've done a complete flipper rebuild on both flippers and also replaced the flipper power supply board. Since the flipper rebuild most of the time when I boot the game up, pinbot will play fine (flippers act normally and are powerful). The only thing thats odd is that the flippers will still flip between games when they should have no power. However, sometimes (and it has been doing this a lot more as of late) after playing for a little bit the flippers will start to randomly flip up and down, and after a short time will stop flipping altogether. Also, if you depress both flipper buttons down at the same time when it's doing this, then the flippers simultaneously flip up and down so the issue is linked to both flippers.
I'm a total novice when it comes to pinball repair, and have no background in electronics so any help is appreciated! I'm not even sure where to start honestly.