go into the onkyo setup page and switch on the power for HDMI
I own a Samsung UN55C8000XF and an Onkyo HT-S7300. Everything was working fine until 2 days ago I get a blue screen when I try to watch Dish Network. If I connect my dish directly to the TV I get sound and video. But I just get the blue screen if I connect my Dish to the receiver and the receiver to TV thru HDMI. What happened? I didn't change anything!
Thanks for your help people