This rubber is very tight against the switch, it was causing 100 point targets not to score and the scoring while pressing flippers/starting game.

Game starts at 100 points instead of zero

Game is not scoring 100 points, game is also making a mysterious ticking noise

Mashing the flippers (right flipper in particular) will move the 100s place score reel. Slingshots that are supposed to score 100 points do not award points.