Strange sound from the speaker, what is the reason?

A

Ammie2016-03-12 20:48:23

Audio

Ammie, 2016-03-12 20:48:23

Good day! I discovered a strange problem a couple of days ago.
I have a Macbook Pro Retina 15 (2014 release)
When you turn on the laptop, when you start the browser, the video on Youtube makes a sound, I don’t even know how to characterize it, whether it’s crackling, or something else. NVRAM and SMC dropped. When I connect my Sennheiser headphones, this is not observed.
I specially recorded the sound so that you can listen - https://cloud.mail.ru/public/D1fv/7iNddakDp
What could be the problem?

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3 answer(s)

Z

Zhbert, 2016-03-12
@Zhbert

Hiss?
Was it permanent or did it appear?
As an option - pickups from power circuits, if something is poorly assembled somewhere.

N

Nikolay, 2016-03-14
@iNickolay

It was like that too. I don't remember if it cured or went away on its own..

B

bogomol34, 2018-08-13
@bogomol34

how did you solve the problem?