I have a an issue when I power up my hyperball. The million comma is lit on P1 and million and thousand comma on P2. During diagnostics the machine indicates that all switches are stuck except the optos. When I start a game, one controlled light on the PF comes on and then the machine freeze in that state (elevator is spinning still though).
I've tried removing as much as possible from the driver board to eliminate that there is a short outside the MPU/driver. Has anyone seen anything similar?