I have a 46 in. Samsung LCD LN-T4661F and VIP722 hooked up through HDMI. I bought a new stand and when I hooked the receiver back up I get a tv prompt that says Weak or No Signal. Component works. The tv2 input also works so I'm guessing the problem is the HDMI port on the receiver. I have tried changing cables. Dish tech help said the tv is not compatible. Any thoughts would be greatly appreciated. Thank you.