When on non-HD channel, screen image appears tilted upwards, with roughly 2" black band at bottom of screen and remainder of image bowed outward and cut off at top of screen. When on HD channel, image is square but seems to be expanded on all sides, with roughly .5" cut off on bottom and sides, and 1.5" cut off at top. When I say cut off, I mean extending outside the viewing area. For example, when watching a football game, the score/quarter/time remaining info at the top is not visisble. Any ideas?