In the vein of the Maybe they’re all burnt out rule, I recently got a Gottlieb Monte Carlo and none of the pop bumpers worked.
I got really lucky with this one. Each pop bumper is fused separately, but each and every one of them was blown individually. I could have gone checking the power train back to the transformer, but I was sort of smart and checked the fuses first. I say sort of smart because if I was legitimately smart, I would already have pulled every fuse on the game and made sure they were as originally specified, and I haven’t.
All of that said, why did three fuses die simultaneously? Well, the game was moved several hundred miles on the back of a truck. The drop target reset fuse had also blown. Maybe the fuses were just old, or perhaps I have another problem. In any case, though, they certainly needed to be replaced.