I have had a ST Pro about a year now and the lower of the three pop bumpers has just started auto firing from vibration during a game.
I inspected it above and below the playfield and compared it to the other two pop bumpers for something broke or out of adjustment. If I just touch the switch on it side edge ever so lightly, it fires. The mech seems adjusted fine, no broken or loose parts to the pop bumper assy, so I'm guessing I'll need to bend or adjust the gap of the switch. There seems to be more "slop" in the side to side movement of the lower assy than the other two but I just don't see anything that's causing it other than wear? These is some white powder on the cabinet floor directly under the pop bumper area above.
If there's another reply or video to how to adjust these pop bumper and/or switches, please send me a link.
Thanks!
(Topic ID: 141085)
Lincoln, NE
