Since this Friday all of my 500 series channels (Showtime, HBO, EPIX, Starz, etc.) now appear with black bands on all four sides of the screen. This makes the picture smaller and narrower. Comcast service has been no help. Any idea how to get back to full screen?
How do you watch? Those channels are probably SD, but the video they send is letterboxed. You may need to use the ZOOM mode on your TV's remote to zoom them up. I have an older legacy box, and it's set so that SD channels are sent as SD, so the TV will zoom them, but not regular HD.