Hi guys, I recently purchased a 37" Philips LCD tv. I tested out HD with a comcast HD box and everything looked great. I moved a few days ago but I am still using comcast. They gave me a Scientific Atlanta Explorer 800HD DVR. I have it hooked up the same way I had the first box hooked up BUT, now there are gray bars on the HD channels and SD TV is zoomed in to fill the screen. After toying with the TV settings for about an hour, I am not able to get it how it was with the first box. There is no screen format on the TV that makes HD full screen without zooming, even though it was correctly displayed on the first box. Do you guys think that it is the box or the TV? I can;t figure out how it could be the box. Please help I am going CRAZY!!!!!!! Thanks in advance and sorry if this post has rambled on, it's just so frustrating that I had my TV working great a few days ago and now everything is messed up. Thanks again.