I just had my Comcast DCT6412 installed a few weeks ago. The channel guide on my HD channels are displaying in 4:3 and the non HD channels are displaying in 16:9. I changed the menu option to override the 4:3 mode to 480i and have a HDMI cable connecting the devices. My TV menu is also set to 16:9. I called Comcast and the Tech support said to power cycle the DVR and after that, they were out of ideas. Does anyone have any suggestions on this?
I am really just looking to get the complete guide in a stretch or full screen instead of the 4:3 screen. If I go to a non HD channel, the guide comes up in full screen. I can then jump to the HD channels and see the screen in full. If I am on a HD channel and hit the guide button, it shows the guide in the smaller format(4:3)
The Comcast DVRs will not stretch the guide to fill the screen. The only reason you see a stretched guide on 4:3 SD channels is because you enabled 4:3 override at 480i; that allows your TV (not the box) to stretch the picture to fill the screen.