How funny. I just picked up a Rollergames, and I'm going to get started on it tonight. The owner had the manual with full schematics. The CPU board is tagged from *1999* by a tech, says that the +5v failed and killed the CPU and possibly the CPU roms. I'm going to start by testing the output of the power board and going from there. I have already traced it from the CPU board to the power board to the transformer in the schematics without even looking on the inside of the head aside from moving it from OKC to Dallas night before last. I love Williams schematics and manuals!