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annoying sound from the back of TV when is off

First Poster

Hello,

I have an issue with my UE55NU7452, when TV is off there is an annoying sound from the back, something like buzzing, a sound of electric voltage.
It is so annoying I cannot sleep, I need to unplug TV every night.

Sound from "inputs area" nearby HDMI input.

 

/Instant On is off.

 

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