Sky Jump is my first EM I've owned, so I'm not completely familiar with the layout on EM machines yet.
So, here's the outline of what is currently going on:
When I first got Sky Jump last summer, it was having problems where it wouldn't start a game and would just "cycle" after the score wheel reset to 0. I determined that I had to clean the jones plug connectors in the back box, and sure enough the game fired up and I enjoyed the heck out of it with no problems!
But about a month or two ago, Sky Jump started doing this: After first plugging it in and turning it on, the game would operate normal. However, when the game was over and the last ball drained, the backbox would light up with "Game Over" but the ball would eject. When I would plunge the ball, none of the pop bumpers or triggers would work because it assumed the game was over.
When I would then try to start another game after this then the "cycling" issue would happen again. The score reel resets to all zeroes, but I hear a repeating motor (sounding like it's underneath in the cabinet) that keeps going and going, and the ball never ejects and the game never starts. When I power off the game and try powering it up again, the same "cycling" continues.
Now, however, when I first plug in the game and power it on to start a new game, the playfield will light up for a second, then turn off and the game never starts.
The only things I've done so far to this point are I cleaned the jones plugs underneath the playfield (the backbox ones still looked clean), and I switched the connector from 5 ball to 3 ball. 3 ball did work correctly, but the same issue occurred with the game over and kicking out another ball, the "cycling" etc.
So I just need some guidance on where to look first. My guess is it has to do with either the ball counter, or the game reset relay. But again, I'm not very familiar with EM machines yet.