I have a friend with a Gottlieb Vegas which has a gottlieb system 3 MPU that is having issues. Game turns on but gives him error code 0631 and does not allow him to start a game. Anyone have any idea what could be going on? He doesn't have the manual and is trying to avoid spending the $25 to order one if possible. Any assistance is greatly appreciated.
No battery acid on the board, something else must be causing the issue out of the blue.