Probably just a fuse.

Find the bridge rectifiers in the back box. One of them should be for the coils. Test for voltage on the red and black wires.

Measure the black and the wire directly across from it ( orange ?). This is DC volts. Then measure the other pair ( red ? )in AC volts. If you have AC volts but not DC volts, you need a new bridge rectifier.

You also need to add fuses to both these bridges to prevent a wire melt down.

Here is where you add two 7 amp fuses and fuse holders to prevent damage to the wiring.

https://pinside.com/pinball/forum/topic/high-speed-club-dispatch-this-is-504-we-have-a-club-now-over/page/82#post-6012108

Sounds like the meter isn't working in AC.

Sounds like you need a new bridge rectifier. From your pic both rectifiers are original to the game, I would replace them both and add the fuse for each.

They come from the factory with the connection soldered like that. It makes for a great connection.

Get your DMM working or get a new one. Check AC in and the DC out.

This is for GI lighting, has nothing to do with the trouble you are having. This does need to be fixed later tho.

Voltmeter set to DC volts, black lead under the ground braid. Red lead and test both sides of this fuse.

aaa (resized).PNG

Replace the fuse with a good one.

I have seen slow blow fuses open up under load and go back to normal once the load is removed. Or the fuse holder is dirty or loose fitting.

Playball!