Game King error lists?

[modessitt]

While looking at some other IGT reel slots, there was Game King there that doesn't work.  They didn't have a key, so they will be drilling the lock for when I go back.  Right now you turn it on and the screen comes up with "Call Attendant" on the screen.  That's it.  Nothing about a low battery or insufficient payout or whatever.  I did have a Jackpot Reset key and tried turning it, but it did nothing.  Not sure if the door needs to be open first or not.

Just wondered about possible causes so I could take stuff with me if I need to.  I've never worked on one of these before, so I don't know if the game boards inside used the same type of battery, whether clear or set chips are needed if the battery is dead, if there is some other problem I should be looking for, etc.

If anyone has any documentation that could help me, I'd appreciate it.  It'll be next week before I go back, but I'd like to be prepared...