Could just be a bad switch, but unplug the machine if it’s not already, and take a pic of the switch on the inside. Then we can see how it’s wired. If the game is turning on regardless of switch position, there may be a problem. It may be they put a new switch somewhere different, although unlikely. It’s also possible they direct wired it to turn on with the mains bypassing the switch. Something an operator may do, rather than flipping fifty power switches they flip the power on at the wall and all power up together. But why not just leave the switches on? Anyways a good pic of the switch from inside the cab may help us. I’m sure those more knowledgeable than I will chime in.