Mini 2018 emitting a tone..?

HeavyMantra

macrumors member
Original poster
Dec 11, 2018
60
21
I've had this machine since late 2018. Yesterday I noticed that it has started to emit a pure tone. It's not the coil whine that has been there from the start, this is something new. The sound is loud enough to bother me. Has anyone experienced this?

If I load a page in my browser, the sound stops while the page is loading
 

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