Just posting a random solution out here I discovered myself in case it is any reference. Just copy pasting here: The monitor was moved closer to where I am sitting and its high-pitched (probably coil) whining/squealing was rather audible. It was originally just powered through a power strip (nothing special there). And connected to my desktop GPU via DP. However, I noticed that miraculously, after I connected the monitor to my computer (with USB-A to USB-C, but USB-C to USB-C probably works), the whine stopped. (This USB port is for allowing you to feed data back into the computer when you connect something like a keyboard to the monitor. Probably something about... closing the ground loop happened. Maybe something like off voltages. Maybe the USB simply allowed the excess something to flow out via a ground. I don't know. But whatever it is, hopefully others will find this solution useful!!! Now that the whine is gone, I'm so lucky I got this to get fixed and go away. My original plan would have been to...

Just posting a random solution out here I discovered myself in case it is any reference. Just copy pasting here: The monitor was moved closer to where I am sitting and its high-pitched (probably coil) whining/squealing was rather audible. It was originally just powered through a power strip (nothing special there). And connected to my desktop GPU via DP. However, I noticed that miraculously, after I connected the monitor to my computer (with USB-A to USB-C, but USB-C to USB-C probably works), the whine stopped. (This USB port is for allowing you to feed data back into the computer when you connect something like a keyboard to the monitor. Probably something about... closing the ground loop happened. Maybe something like off voltages. Maybe the USB simply allowed the excess something to flow out via a ground. I don't know. But whatever it is, hopefully others will find this solution useful!!! Now that the whine is gone, I'm so lucky I got this to get fixed and go away. My original plan would have been to...