Ok, so I've been enjoying my MBP (2nd one after the first had dust behind the glass) and today I just noticed something. When the monitor dims let's say after a minute and I touch the keyboard or mouse the monitor comes back to its normal brightness but a high pitched whine happens. It's kind of like the sound of turning on a camera flash for the first time. I'm now actually hearing it when it's normally working too, a little less but I still hear it. It changes pitch when I scroll the screen. Anybody else notice this? Should I bother taking it to Apple? When I adjust the brightness I just realized it makes it happen. As soon as the brightness hits the highest 2-3 notches it sounds like a freaking camera flash turning on.