I just finished hooking up a Panasonic 34" HDTV (CT34WX54) to a comcast hd cable box I used component video cables for the hd and also used 75ohm coax for the regular channels. The picture for both inputs is great but my question is; when using the coax connection the guide for the cable channels does not display, it only works using the component connection. Comcast support said the tv was not able to display the guide because of the size and there needs to be an adjustment in the tv settings, Is this correct? This is an issue as the regular channel picture quality is not good using component connection. Please help!