Today I was trying to play a game of beamrider...everything was fine until the top left side button stopped responding. Generally when it does this I just pushed down a bit harder or on a different corner of the button until it started back up but that didn't work today. Hitting the right button got a reaction some of the time. So, I don't know exactly whats wrong with it. I'm gonna have to open it up, but can anyone give me any tips as to what it could be, or if I'll have any trouble getting it put back together, or what?