Since my original post is going on a year old (already? damn!) figured I would start a new one. I'm making one last ditch effort to fix my Atari XE game system (which was sold to me as fully working!). The system (after cleaning, etc.) does work (it definitely wasn't tested as most of the games would not fire up until I thoroughly cleaned everything). Original game cartridges fire up and joysticks work fine. When I fire up the system with just the keyboard plugged in, it boots to the basic