Make sure that the drain tube is not clogged up.
I found a black tube in the bottom of the machine by the compressor. I'm presuming this is the drain tube and it goes from a connector and drips into the removable pan? There's this rusty thing hanging down from the top of the compressor area, I would presume, due to the rust, that this is where the water would be coming from, plus it's over the pan. I haven't seen anything drip from there the last few days I've had it running. I'll check that out today.
Your slug rejector is dirty. Throw it in a bucket of hot soapy water.
A new ballast costs the same as a new bulb, so save money by installing the ballast first.
I just sold one of these with that 70's looking woodgrain.........for $800.00. This is a
real nice first machine.
I'll have to figure out how to tear down the coin acceptor. I'm afraid of breaking it, or not remember where things go. Is the ballast located where the bulb is behind the sign? I'm presuming you access it by removing the two screws on the bottom of the sign?
$800? That gives me a warm fuzzy feeling that I got a good deal.

I picked this up for $150.