I have the older unit with the older led color layout. Mine does it as well only when the lights are turned off and only the the little led light is on (not the the display screen). Then if I turn just the moon lights on the sound goes away. My fans do not run with the moonlights on, unless it is because I am running them at a lower percentage (currently at 2%). The noise is coming from the front left (looking at the unit). I do not think it is a driver it is a small box directly by the vent in front about 3-4 inches away from display.