Samsung Viewfinity S9 - Coil Whine - Sound Issue

[Canberk]

I recently bought a Samsung Viewfinity S9. I’m using it with my MacBook Air M3, connecting the MacBook via the Thunderbolt 4 cable that came with the monitor.

However, I have an issue with an electrical noise (probably coil whine) coming from the back. This problem occurs when I connect the monitor to the MacBook—a slight buzzing sound appears.

There’s no noise when the mac is not connected or when it’s in main interface of the monitor or in settings interface. The sound changes when I connect or disconnect the camera that came with the monitor. The sound changes when I remove the camera, and it changes again when I plug it back in.

I’m not sure if that sound is normal or not. Because, It’s very quiet, but in a silent room, it’s quite disturbing.

Is there anyone having the same sound issue with the Samsung monitors? Do you think it is related to thunderbolt cable. Should i but a new cable or should i use miniDP port?

[Canberk]

Does that motherboard replacement work, is it fine now?

[someone_]

Hello, 

I am having the same issue. 

Did anyone find a fix? 

[someone_]

Update from my analysis: the issue doesn't happen when on the OS (1405 or 2000) of the monitor. The issue doesn't either happen when on Windows. The issue only happens when on Mac OS (Sonoma for now, updating to Sequoia to check if it could sove the issue). 

[solidity]

Does Sequoia helped?

[Canberk]

It don't in my case. It is still happening.

[ArsK]

Either do I. Exact the same issues with Mac Mini M4. Slightly changes the hiss with/without camera.

Extremely annoying issue for me.

[solidity]

Same thing on my macbook m1 

[Hergesheimer]

They changed the motherboard but the annoyance is unfortunately back. I think it‘s a major construction problem or and a weak component which is too expensive or impossible to replace. I am pretty sure Samsung knows about the issue but they don‘t want to recognise it due to costs. I will avoid Samsung next time and invest in an Apple Studio display.