I have a screen size issue with a new Samsung TV on Standard Definition (SD) channels from my FIOS set top box. HD channels are displayed perfectly on TV as are DVD/Blue Ray player inputs. However, with SD TV channels from set top box, I can only display a picture with under scan (black bars on sides) or over scan (top and bottom of picture cut off). Both HD and SD channels are sent to TV as 1920x1080i signals from the FIOS set top box (Motorola HD QIP 71001). Set top box is set to "16:9 wide". Never noticed an issue on my old Sony TV which new TV replaced. Any suggestions for getting SD channels to display fully with in the screen without over or under scan?