Hi,
I have the D54250WYK nuc. When the DC power supply is plugged in and the nuc is off, I can hear a very clear and annoying high pitch whine. This is particular disturbing at night with little to no other background noise. I believe this is from the grey rectangular chips on the board (a few of them are under the fan as well). Or in order words, I think it is due to the inductors in the power circuitry. I have other small motherboards with picoPSU power supplies and they make no audible switching noise when the computer if off. Is my board faulty or is this just how all the (haswell) nucs are when powered down? The amplitude and pitch becomes even more annoying when I plug in a 12V DC power supply rather than the 19V one it comes with.
Appreciateupply the help,
Shailen.