Well, I know the fan isn't working. Because I can't hear it. I've had my own small portable fan pointed at it any time I've had to edit video. Which btw, my Final Cut Express chose to start ignoring my camera after 5 months of working with it just fine. Some Mac update killed it and now I can't seem to reverse the effect. There's an Apple store in Charleston, but I'd almost rather have a half-functional Mac to complain about than go get it looked at/fixed.