Many users, myself included, have experienced coil whine issues with the U2725QE and U3225QE monitors. The severity varies—some only notice it when standing close, while others find it more pronounced during operation or even when the monitor is powered off.
After extensive testing, I’ve discovered an effective way to minimize (or completely eliminate) this annoying coil whine during regular use.
Important note: Results may vary due to individual device differences. This guide isn’t about judging product quality, but rather offering a practical solution for users who want to keep their monitors while reducing unwanted noise.
[1] Identifying the noise source:
The buzzing is most noticeable near the monitor’s right side (when facing it), where the power circuitry is housed. This occurs because the AC/DC power supply constantly switches currents, and under certain conditions, this can cause inductors or capacitors (primarily inductors) to vibrate audibly—a phenomenon commonly known as “coil whine” or “electrical buzzing.”
Interestingly, the noise intensity often fluctuates with the monitor’s workload, meaning adjusting certain settings could potentially control the sound.
[2] The practical solution:
Try adjusting your brightness settings from 0% to 100% while listening for changes. On my unit, the whine completely disappears above 78% brightness, while lower settings make it audible—slightly more noticeable at 0%, but not dramatically so. (Tested via DP connection—your experience may differ.)
[3] Alternative approaches:
If brightness adjustment doesn’t help, experiment with different video interfaces (DP, HDMI, ThunderBolt) or try connecting multiple devices. Essentially, any change that alters the monitor’s workload might help you find that sweet spot where the noise diminishes.
Hope this helps!
Nicole Hall 
Eli Cruz 
Audrey Ramos
I appreciate you breaking down the troubleshooting steps so clearly—it really helps make sense of what could be a complicated issue. I’ll definitely try the capacitor mod you mentioned, especially since the buzzing gets pretty distracting during long work sessions. It’s good to know that results can vary, so I won’t get discouraged if it doesn’t disappear entirely. Hope my monitor is one of the lucky ones!
Thank you for your kind words! I’m glad you found the guide helpful. The capacitor mod has worked wonders for many users, and even a partial improvement can make a big difference during long workdays. Fingers crossed for your monitor—best of luck with the troubleshooting!
I appreciate you diving deep into troubleshooting coil whine on the U2725QE. It’s good to know there are steps I can try if it gets too distracting. I wonder how many people will actually go through all these steps though—seems like a lot of effort! Have you personally tried this method yourself?
I had no idea that coil whine could get so bad on these monitors! It’s interesting that you found a solution that works most of the time, though I’m skeptical if it’ll work for my specific setup. I’ll definitely try your steps since the buzzing distracts me during long work sessions. Good job breaking it down into clear troubleshooting steps.
Thank you for sharing your experience! Yes, coil whine can indeed be quite noticeable on some monitors, but many users find success with these troubleshooting steps. Even if it doesn’t completely solve the issue in every case, trying them is worth a shot. I’m glad you found the guide helpful, and I hope it makes your work sessions more enjoyable!
I’ve been dealing with the buzzing sound on my U2725QE for a while now, so it’s good to know there are steps to try and reduce it. I especially appreciate the reminder that results can vary depending on the specific unit. I’ll definitely give these troubleshooting tips a shot and see if they help. It’s reassuring to know I’m not alone in experiencing this issue.