I finally figured out what the buzzing coming from my computer is.. The case I think is messed up.. I get a vibrating buzzing sound, the type that comes from high voltage wires, but when i squeeze the bototm of the computer, the noise stops. I took the back off, and put it back on. This helped a little bit. Now i can stand to at least sit by my commputer without tearing my hair out. When i squeeze the bottom, i can feel that in the bottom middle, it is not flush to the front of the computer. Every other day i take a scredriver and tighten up the screws, and this helps a little bit, but the noise keeps coming back, just now its a little faint. I have applecare, (20inch g5 2.0ghz) Will apple cover this? I never take my computer anywhere, and it never gets touched, so why could this have happened? The last time I took it somehwere was to get a hd replaced because the hd died, could they have done it? This was a couple weeks ago.