Today,after day 4 with my new macbook pro, i noticed a different sound than the screen hiss thing that many people report. Mine sounds like a clicking/clucking/creaking noise coming from the back right corner, by the hinge of the screen. Like by the DVI port corner. I was thinking maybe its a fan? Doesn't sound like a hard drive. Is that even where the hard drive is located? Should i have this checked out? When I turn the computer off, its still there for a little bit, and does it sporadically, so its not continuous.