I have to disagree with the "no video q lost" statement. Component is much softer than HDMI. To some it actually may be an improvement and not as harsh as HDMI, but there is no way that component looks "as good" as HDMI.
I would do what whatchel1 is mentioning. The audio sync setting on the Dish receiver is probably the issue here.
See ya
Tony
BTW I have my sat receiver connected to my Hitachi TV via HDMI, Component, S-Video and Composite for no other reason other than I can. So I have checked it out with my own eyes and some one else selecting the inputs blind. I could spot the difference every time between all 4 inputs. Sometimes it took me a while, but I scored 100.