I recently purchased a Bally Kings of Steel pinball machine and successfully played several games. After a few games the ball went into the outhole (I think that's what it's called the exit hole) and the machine stopped responding but the lights were still on. After some troubleshooting and replacing the F4 fuse, we think that the ball return system might be causing the fuse to repeatedly blow. Any advice?

Also forgot to mention that both times the game has stopped responding it was at the precise moment the ball falls into the outhole if that's at all helpful