Was getting a nice 1360x768 image on my Sharp LC-32D50U from my new aluminum Macbook via the TV's DVI port. All of a sudden the TV won't display full screen. i have confirmed that the Macbook is outputting 1360x768 but the TV is not scaling/mapping it. i get 1" black borders on both sides of the TV. I have the tv set to PixelbyPixel mode and i have the resolution on the DVI Input set to 1360x768 but nothing. This worked fine 2 days ago. Could something inside the TV have failed?