Just brought home a nice Medusa and everything is great except it is currently only a box of lights. Game worked great when I bought it, but it did not survive the ride home.
I turn it on and it starts up just fine. Lights come on, displays show up nicely, drop targets do their dance, has 18 credits (and I can add more), the ball is in the game, and the MPU LED flashes the right number of times.
Eagerly tap the button to start a game and....... nothing.
It's my first early SS Bally and so I look up how to get to the service menu (or Self Test) and hit that button.... Nothing happens.
I've tried all the obvious stuff except re-soldering connections. (checked for loose wires, checked fuses, reseated all the connectors on the boards, it has a remote battery and no acid damage, etc.)
I used to be able to make the game tilt, but that no longer works from any of the tilt mechanisms.
The solenoid on the coindoor was warm and noisy, so I clipped the wires to no positive effect.
Having both the self test menu and the game start button out simultaneously seems odd to me and I don't know if there is a correlation.
Suggestions welcome on any additional troubleshooting tips.