Issue with Sony TV, as well. Not a blue screen. Black screen. No sound. Nothing. Unplugging and replugging the hdmi cable is the only thing that works. HDMI cable was perfectly fine with directv. I can see from researching this forum that this problem has been ongoing for years, and comcast's continued response is that it must be a problem with their customer's equipment. Apparently the only solution is to put up with it until my contract expires, then return to satellite.
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