Hoping someone can assist here. I'm experiencing two problems with this machine. first off the game fully works and scores. However, I'm having a back box issue first. Lights in the backbox don't stay on. However, every time I score points whether it be drop targets, pop bumper roll overs, the backbox lights flash on and turn
off. I'm wondering if this has anything to do with the playfield lights turning on and off and finally taking out the 15 amp fuse. Anyone have any idea what to look for?

Backbox connector not making proper connection. Connector cleaned and all lights good.

Playfield lamps fixed. Turns out when the 3000 bonus lamp lit, the playfield lamps would dim. Eventually the 15 amp fuses would pop. Someone tightened the
wire to the lamp socket onto the ground braid causing the short. Wire released from the screw and all is well now.