I have a Roku HD/XR and it works just fine hooked up to my Vizio 37" HDTV via HDMI. However, when I try to connect the same Roku box to my Vizio 47" HDTV via HDMI I get static. I have been on the phone with Roku and also contacted them via email. No one seems to know the answer to this. I have switched cables, reversed cables, rebooted, reset, changed resolution before moving the Roku box. Nothing seems to work. Anybody else have this issue? Any ideas? I would really like to have the XR on my main TV since it can be set to 1080P and has the USB input. Help!