
I want to reiterate that the VP247QG only makes this noise when it is displaying an input signal, so I have no idea what could be causing it, or if it's even fixable. The closest sound I can compare it to is the high-pitched noise that old CRT televisions make due to the horizontal movement of the electron gun. I've read a number of articles about it being a low-load PSU issue and that I should try changing the brightness, though the whine remains at the same level regardless of the brightness setting. The Dell SE2416H was a recent purchase that caused me to rearrange my desk, so I've only recently noticed the ASUS's whine now that I've moved it closer to me. It only whines when it is displaying a signal from a computer. The monitor does not produce this whine when in sleep mode OR while turning on even if it's displaying the full-blue "No Signal" screen, it does not whine.

I have a triple monitor setup (the other two being an Acer Predator XB271HU and a Dell SE2416H), and neither of the other monitors have this issue.

Purchased an ASUS VP247QG brand new back in mid/late July, and it produces a barely audible (yet very distinct and annoying) high-pitched whine noise whenever it receives an input signal (tested over both HDMI and VGA ports).
