Please keep in mind as a recent owner and one who did a fair amount of work to said game that CV can take a while to dial in. This is not unusual as this is a fairly complex game.
My suggestion would be to try and tackle each individual issue one at a time. What do your switch tests look like? That would be a good place to start. Take the glass off and place the game in switch test mode and start activating each switch. Do they all work? Just a few thoughts to consider