I connected my Dish Vip 622 DVR via HDMI to a new Yamaha a/v receiver, then by HDMI to a Samsung TV but no audio or video signals reach the TV. When the Dish box is connected directly to the TV everything works fine. I have tried 3 different a/v receivers, 2 Yamaha & 1 Onkyo, and verified the cables are good. I have talked to techs at Yamaha, Samsung and Dish and no-one has been able to help. Is it possible that there may be some settings that need to be changed in the Dish receiver or can anyone come up with other suggestions? I have been working on this for 2 weeks and could really use some help.