Stefaanofc wrote:
I was listening to music, the speakers were working fine until one moment when the left speaker started to hiss. There are no physical damages, and the MacBook is only a month old.
[Re-Titled by Moderator]
For hardware issue take it in
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"
Genius Bar Reservation and Apple Support Options - Apple
Outside the USA
Contact Apple for support and service - Apple Support
From iOS device using the "Apple Support.app” to make a online Genius Bar appointment is easy:
https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8