I purchased a 60" GT30 Plasma for my basement. I am running a cable box and a Blu-Ray into an Onkyo receiver and the single HDMI out goes into an HDMI wall plate that converts the signal to CAT5 cable. Those CAT5 cables run roughly 50' to the TV, which there is another HDMI wall plate that converts the signal from CAT5 back to HDMI, which then goes into the Panasonic HDMI 1 input. Cable box HD picture looks great. But the BluRay video is very grainy or snowy. I've tested each part of this setup individually (BluRay into Panasonic HDMI 1 input; Cable Box into HDMI 1 input; etc) and each looks good. I've even put a 22" Samsung TV on the other end of BluRay-HDMI wall Plate-CAT5-HDMI wall Plate- setup and the BluRay video looks great as it should. Could this be an issue with the Panasonic or some other part of this setup?