Question from Bill: I work at a community center and we have 3 arcade machines (Arcade Legends, Gameroom classics and Midway). We have been having a hard time finding someone to work on our machines. The Arcade Legends had some controller problems, but I was able to order switches and replace them. The trackball stopped working and I ordered a replacement. I installed it and it still does not work. Can you give me an idea what the problem might be? I did take the unit out to make sure that it was installed correctly and it still does not work. This is the most popular of the games and without the trackball several games are not accessible.