I too have been struggling with this problem for the past 3-4 months. I found a solution that worked for me and I suspect it may be a bug in BigBox. I found that when I had selected Screen Transition: Random, my BigBox would lock up or some of the screens would be black. No matter what else I did, as long as I left the screen transitions to random and let Attract Mode run, this would happen to me. I tried all of these suggestions and none of them worked. I'm guessing that as the Attract mode ran, it eventually hit the right combination of the transition that was causing problems. That would explain the varying timeframes in which my machine would have this issue. Sometimes it was within minutes of going into Attract mode and other times it would take hours. This might explain why some people have had luck in changing the time between game changes in Attract mode as the fewer moves it makes the less chance you have to hit the bad transition. But when I set the Screen Transition to a specific transition, the problem stopped immediately. Hopefully that helps someone.