Odyssey2 controllers

[simbalion]

Today I was playing my currently aquired Odyssey2 when the fire button on the left controller just quit working. Now this one has the 'wired' controllers that you have to pop the console apart to unplug. I knew I had one or two spares in a batch of controllers I saved from a damp basement, so tried them out. Well, the first didn't work at all, but the rusty one works! Thank goodness! Anyways, is there a way to repair these critters? I was looking inside the one that quit on me and... well... it looks like a gutless wonder. Actually, I should pull one of the plug in type units apart and see what the differences are. These self-center where the plug in types I have don't.