@Clive_A Hello, The serial numbers of both switches are 22396L7000115 and 22396L7000009. Both of them produce the same coil whine sound. If your team judges this isn't normal, I probably will ask for...

@Clive_A The noise itself is manageable. Just want to make sure the noise doesn't hide a power issue and then face a dying power supply. Let me know what your team thinks, I will be waiting. Thank...

@Clive_A Sounds good and much appreciated. Do you know approximately how much time before we can get an answer? Are we talking a week or two? Thanks

@Clive_A I just made a video. You will see two TL-SG3428X-M2 switches on top and one TL-SG3210XHP-M2 at the bottom. They are not mounted yet as I am still debating if I should keep them on not. In...

@Clive_A I received the second V1.0 of this switch this morning and it has the same coil whine, although a bit higher pitched than the other switch. I'm not sure if this is an issue that only plagues...

@Clive_A Hi, All outlets cause the same issues.