AW 15 R3 - the speakers stopped working

Hi.

Turn on my notebook few days ago and don't heard any sound from speakers.

Headphones work fine - speakers not. Try to reinstall driver / windows troubleshot / Dell support assist. Nothing help. 

All Dell support give me just one answer "call us". I'm not in US now, so this is problem for me.

Hope this is some software problem! Sad to know that 1300$ notebook have bad speakers...