Hi all - wanted to jump into this conversation as we are expereiencing the same thing with a brand new Vizio 75 inch Quantum P series. We use a new 4k xfinity cable box. TV is a month old, they came and replaced the motherboard and still the TV turned on by itself. I have made sure that nothing at ALL was plugged into the TV and it still turns on. They sent me a BRAND NEW TV and the issue is still occuring! I am at a loss - close to returning the VIZIO but something is telling me it is NOT the TV. I have NOT tried the remote trick that Peg has but I will tonight and see if the problem continues.
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