Hello All, I am looking to see if if someone might have some info that may help me solve this issue, I did a forum search and nothing came up.

I have a Atari 5200 2 port, for whatever reason the machine will not accept any input from the controllers, basically I can press every button the controller and nothing will happen on the screen any help or suggestions on what might be causing this would be great

I also have a 4 port 5200 and 3 controllers, all 3 controllers work great on my 4 port, so I can rule out the controllers being the issue