Location: Centennial, CO
Symptoms: Auto-launch ball shooter would not launch ball. Lower playfield lights not working.
I opened the coin door on the pinball machine and immediately saw a coil dangling from the playfield. It was the shooter coil and it was resting on the metal junction box. It probably grounded out against the box causing the 50V supply fuse to blow.
The coil bracket had broken from the stresses and vibration of years of use.
The lower playfield general illumination lights were not working. I suspected a connection problem on the IO Power/Driver board. I couldn’t find any problems with the connector. The lights started working momentarily on their own. I could hear a faint buzzing that seemed to be emanating from the fuse. I tapped the fuse and the buzzing would change. I removed the fuse and tested it. It wasn’t blown, but there was a connection problem inside of it (more on fuses here). I replaced it and the lights began working reliably.
Once the lights and the shooter coil were fixed, I played a test game and discovered a playfield ramp switch that was dangling with nothing holding it. I wasn’t able to locate any screws lying in the cabinet. So I reattached it with a new screw.