I just bought an Evic VT earlier and whenever the screen is on, and for a minute or two after it shuts off, I can hear a whining noise and click that keeps repeating. It’s a very faint sound and I have t hold it up to my ear to hear it. It doesn't matter what power mode it’s in, doesn't matter the power or temp its set at. Also even if the device is off and its charging I can still hear the whining noise, but not the constant click.