Samsung 60" 1080p 120Hz LED HDTV (UN60EH6000FXZC)

Model number for the TV is in the subject bar. I also just realized...I had my Apple TV connected through the sub/soundbar this way and it worked perfectly, picture and all. Wondering what is going on and why it won't work with my Xbox 360 and Satellite box? I've triple checked all the connections and tried connecting everything every way possible that I'm aware of.