I have the same box with cablevision in new jersey, and I picked up some helpful tips from a thread abouth the 8300. In the settings menu, under picture settings, you can set your box to pass through the signal to your TV. That way whatever the signal is, 1080 or 480, etc., the TV will get it. This also helped me with formatting. To fill my screen, I had to keep changing the zoom settings and picture formats on the TV. With the box set to pass through the signal, I can leave my TV format on 16:9, and all channels are displayed correctly in that format.