Qbert is giving me fits!!! Everything was working fine, now qbert moves down constantly. He moves left/down all the time but will go right but always down. The joy is working correctly and I have tested the switches and they work. I have ran continuity of each wire from the CP plug to the MPU plug. I have cleaned the edge connector on the MPU. I Cut the wire from the JOY in the down/left microswitch and no change. I reflowed all the pins in the filter board, rebuilt the PS. It was working fine, now this. Any ideas what I should check?

