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When I first hooked up the TV, I used an old HDMI cable I had and it did not work. I had another newer cable and it worked better but had lagging issues. I finally picked up a 4K Monster cable from wal-mart for $10 and it worked perfectly.
Sorry, there was a problem. Please try again later.No, you do not need a new HDMI cable for Ultra HD 4K. ^Daphane
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