I have a receiver unit managing my cable/dvr box, bluray player and wii. Connection to Samsung LCD is over a very high end interior wall rated 25ft hdmi cable that is run through the wall. The picture quality when viewing tv/cable and bluray is flawless..looks great. Problem arises when I switch receiver to wii mode. I get little white sparkles on the screen and occasionally a white, noisy flash. I can't imagine its the hdmi cable since the picture quality is perfect with tv and bluray. What could cause this? I've tried moving cables around, unplugging things, etc.