Matt smelled smoke and turned off the machine. Turned out the “super special when lit” hole had thrown its plunger all the way to the surface. When a ball fell in the hole, the coil locked on and heated up, burning the coil wrapper and singing the wood.

The coil wrapper was not paper; other coils look like they’re covered with some synthetic leather like Fabrikoid. The coil color is no longer discernible, but the most similar coil in the machine is green. Coil is approximately 0.85" in diameter and 1.25" long. End with lugs is 1" x 1.2".

Apparently due to the heat, the switch disabled itself; I can’t find the end that contacted the ball. For now I removed the plunger and printed a disc, 0.5" x 1.1", to fill the hole.

While I was in there, I fixed a couple of the bumper relays. The one marked “1-4” was missing a spring, and a couple more were out of place. To test, manually reset the whole bank. Scoring still isn’t right, though; this machine could use a thorough overhaul.