I'm having the same issue - brand new MU8000 turns itself on each night when comcast sends its update and powers back up. I am using the HDMI-Arc port for a soundbar. I will try turning off Anynet tonight and unplugging that soundbar HDMI cable to see if it is indeed that issue. That solution is not acceptable, though as for a higher end tv, I should be able to use the HDMI-Arc port! I only have 7 more days before my return window closes -so trying to find a solution quickly. I really like the tv and don't want the hassle of boxing it up and bringing it back.
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