satan4u

I have just been given an atari 2600 that has been in storage for years with a whole bunch of games the first problem I have is there is allot of dots on the screen and if i move the coaxial cable it loses the picture its the original cable that came with the system so I figured easy enough I can get the connections off ebay or somewhere to fix that problem the second and main problem is the controller ports don't work it came with 6 controllers and none of them work the chances of it being the controllers are kinda low so I was wondering what would be making the controller ports on the unit not work and how would I check or fix the problem?