I bought a new 15-inch 2.4GHz MacBook Pro a month ago. The screen has been dimming and flickering. The brightness levels adjust automatically. I thought the flickering might be indicative of a video signal interruption. Perhaps a bad connection between the body of the laptop and the screen. Also I experienced a "shut down" problem last night. After I "shut down" the computer the screen turned off, however, the power LED stayed on, the battery stayed warm, and the "caps lock" key still worked after reopening up the display. After leaving it until morning I was able to turn it back on and it booted up normally. A Genius at the Apple store ran a full hardware diagnostic and found nothing wrong. But something must be. Can anyone help???