surface pro static noise

[RajeevT]

Computer-boffins dot ca has the fix. Can't post a link because I have to make 10 posts first!

Solved : Surface Pro Microphone Background Noise | Computer Boffins

 

[KAVogel]

Mine does the same thing. I noticed it for the first time today. Pretty loud. Only stopped when I totally shut down the machine. I don't think it's a cooling fan. Also, the back of the unit is hot when on.