The game will reset as soon as you hit the Right Flipper Button. To be clear, the right flipper coils never fire. So I don't think it's a low power issue (like on WPC games where you hit both flippers at the same time and the game resets.) I have tested triggering multiple solenoids at the same time (pops, left flipper) and the game does not reset. It's the right flipper button inside the cabinet that is causing it I belive.

There is a spark at the connectors when pressing the button, and the game reboots. I have cleaned the connectors and the wiring looks fine, but it does spark every time. There is no diode on the switch, but I don't think there is supposed to be.

Any ideas? thanks

OK, I just replaced with a new coil. Now the lower right flipper will actually flip once (top right flipper doesn't move), but the game still immediately reboots when you hit the right flipper button.

Thanks. With which wire are they linked together?

Ok so these two wires should feed the upper right flipper. Solid Blue and Blue/Yellow. Right?

02EB438A-ACE9-48A8-9EAB-15C3AA48AF0C (resized).jpeg

Here is a pic of the upper right flipper coil. Looks like they don't have a common wire...? The Blue/Yellow wire looks different. And the only solid blue wires for the upper flipper are just coming from the EOS switch. Confusing.

E3A35FFD-64A3-414B-8176-0B71EE32E309 (resized).jpeg

That's supposed to be connected there and it's not touching anything else. better pic:
10E8DEB8-3FD4-46B4-8796-E495D37633BF (resized).jpeg

FIXED! Turns out it was the upper right coil that was the problem. The black/yellow and blue/yellow were connected to the wrong lugs (as you can see in the photo). I reversed them and now everything is working.

Thanks everyone for your help!

I'm guessing the previous owner did. This is a project that I just started going through so this is how it came to me. I recall the guy I bought it from was selling it because "the flipper stopped working". I am guessing based on the miswired coils and shit solder job that he tried to fix it unsuccessfully before listing it for sale.