Everything was fine, but someone must have pushed a wrong button. I have "antenna (cable) in" to the cable box only. I have the TV as source 1, and DVD player as source 2. Now I have no sound from TV. Source 2 is the DVD player which has everything functioning normally. Set up menu has "speaker= normal", "audio out=muting, "system mode=on. I tried changing a few settings, and now in "set up" with system mode off, the picture is good but no sound. With system mode on I have no picture and no sound.