What kind of squeak is published in Macbook?

Question

macbook

Good day to all!
Macbook Pro Retina 15 (Mid 2014), on board OS X El Capitan and Windows 7 Professional

When Windows is running, I periodically hear a squeak that is emitted from the right side under the keyboard, and when OS X is running, the squeak will already be muffled, and I can hear it, having already put the right side of the computer to my ear. I would like to hear from Macbook owners, have you encountered such a problem? Why is this beeping coming out and how can I fix it? Thank you!

Answer 1

Play with brightness - will the squeak change?

Answer 2

On these machines, the brightness does not "sound".
on some "instances" users really hear the squeak emitted by the coils of the processor power converters. Nothing can be done about this, and a defect will not be considered if you contact the service. But that the OS and Windows "squeak" in different ways is suggestive. When powered from the network and from the battery, the same symptoms?