Recently had this box which works OK but I am surprised that it is always ON . When I shut the picture OFF the light on the front of the box turns red, as expected. But the box continues to make a noticeable noise as if a fan or a disc is rotating? This continues and the top of the box is always hot. My older box was silent when turned off. The only way to silence my new box is to shut it off at the mains plug which I am sure is not what is recommended. At the moment my box is NOT silent whe OFF and is continually using electricity. ANY ADVICE FROM ANYONE?