Squeaking above the keyboard of a MacBook Pro (15" 2015)?

Question

macbook

Hello! I recently noticed a strange "electrical" squeak near the top of the keyboard on my MacBook 15 "2015 (bought new, in the summer of 2018). I tried to find information, it seems that there may be coils of processor power converters. Or are there any other options? HDD does not crack maybe, because it costs a native SSD ... I

am attaching a link to an audio recording of what kind of squeak it is. I recorded it with an iPhone at night in complete silence (only the clock is ticking at 3 meters), brought it literally 1 cm above the keyboard.

I noticed a feature - the squeak definitely manifests itself when I pull the artboard in Figma, back and forth. Until I stop, the squeak will not disappear. Accordingly, it definitely manifests itself under load, which means it is either connected with the processor, or with RAM, or not?

Should I worry and take it for diagnostics (normal off-service 250 km ...)? Especially considering that it happens somehow spontaneously (with a more or less uniform load) the temperature rises to 65-68 degrees, after which it cools noisily to 53-55. With minimal loads 43-45 degrees.

Dropbox audio link:
https://www.dropbox.com/s/ujbbm6ejtzdaeix/%D0%9F%D...

Answer 1

Well, it's definitely a transistor. I had such a squeak from the vidyuhi (power circuits) on my computer, but only when I overclocked it. She worked for me like that for 5 years, then she went to another owner.

Answer 2

Yesterday, for the sake of interest, I also listened to my iPhone in complete silence, in the same way you can hear about the same squeak. Even in the locked state, and when you unlock it, there are clicks and squeaks. It's all audible if you put your ear to the back and listen in perfect silence... So I think the problem is rather psychological))