I've had my Atari for the past decade now, always worked without flaw, and I only kept games that worked. Ever since my move, it's been different, most of the games still work but somes that did now don't. I don't have a list yet but the games that are confirmed to never work anymore are Pitfall and Pacman, two completely different games. Pitfall I even took apart, cleaned, reseated, and it still has no response, the machine doesn't even boot up an extra copy of Pitfall I had on hand which I also cleaned. It does boot up other activision games such as Enduro, Plaque Attack, and Pressure Cooker, as well as the more basic Atari games such as Adventure or Haunted House.
My question is, is it the Atari, or have a handful of my games just failed within the same time frame? I have a reproduction power supply which makes no difference, I just replaced the power switch, the voltage chip works fine, I don't know what else I could check. I cleaned the cartridge port about a year or so ago but I guess I could do it again.