I have the above model Panny and am using an HDMI cord between my cable box and TV. ONly other thing hooked up is a DVD player and stereo RX. Regarding the TV, I can't ever switch between HD and SD channels without having to go into the TV's menu and switch between "TV" input and "HDMI". My layout at this part of the menu is:
2. component 1
3. component 2
5. i forget.
So let's say I am watching CBS in SD, I choose option #1 above. BUt, if I want to switch to CBS in HD, in order to avoid pillar bars, I have to switch to #4. Anotherwords, the TV does not adjust aspect ratio automatically. My mother in law has the same TV and their TV switches automatically between SD and HD. What's wierd, is that on their TV, option #1 is listed as "cable", not TV. My cable comes from the wall to the box and from the box to the TV. Do I even need the cable from the box to the TV, if I am using the HDMI from box to TV? Maybe this is the problem???? Thanks.