We have this Pioneer PDP-4271HD Flatscreen that also have a Cable Card in the back. Never have had a problem with it till Sunday Morning. Turned it on, nothing was showing. I switch the Input select, turn my 360 on and its there, same for DVD player. Go Back for TV viewing and nothing. End up having to look at online updates to see who won 24 Hours of Daytona(RX-8 ftw). Give up on it and later in the day try again and the same thing happens. Later find out that the HD only stations that are few in number and pretty much just local TV works fine in the 400+ station range. Have come to the conclusion the TV itself is only showing HD only networks and thats it. I know shit about tvs, I just use them and how to correctly wire stuff into the back of them, so anything is that might fix this issue would be nice.