Been tracking down a number of little problems and think I have this one figured out, but need a little push in the right direction. The top four or five lights on the pacmaze flicker when yellow. Switched out the MPU to an Alltek and the flickering stopped. Put the original MPU back in, flickering came back. My question is, where should I be looking on the board for the cause of this issue? I have already repinned connectors and replaced all header pins. Thanks.