Your settings seem ok, and similar to mine. Are you getting audio for DVD and DTV?
Regardinng the DVD player, is it in Progressive mode. The Panasonic does not accept 480i over HDMI. Make sure your signal has format allowed on the input, and at least 480p.
Regarding not seeing any video, the Denon receiver allows you to mix and match audio and video sources on the fly. Thy this, in input "DVD" mode, use the "Video Select" function to scroll through various video inputs. Maybe they are mismatched. Repeat same for input "DBS".