Growing up, we had the aforementioned Zaccaria machine in our basement as kids, and spent a lot of time playing it and learning the nuances of the game. Fast-forward thirty years and now it's in MY basement, under a sheet being stored. I thought it was high time that my kids learned what a real game is and decided to break it out in dramatic fashion.
Of course, it doesn't work.
My muscle memory kicked in and, after plugging it in I reached underneath to throw the main switch, opened the coin box to manually trigger the coin drop and... nothing. There's lights on the playfield so I know that we have power but otherwise it just doesn't react.
I know the correct answer is to hire somebody to come and check it out but in the off chance that there's an EASY and obvious solution, I figured I'd post. I've already located all of the fuses, checked them and reseated them in the case that it's just a connection problem but that made no difference.