Dell E6430 ATG headphones not working

Hi,

In my e6430 atg laptop headphones don't work. I made BIOS diagnostics & there was a sound either from speakers or the headhones. When I plug phones in, there was a sound also in speakers, not only in headphones.

But in win 7 x64 I can't hear anything from headphones, only speakers work. I tried to reinstall IDT, update BIOS, CHIPSET, update WIN 7, force microphone to headphones, but problem still is not solved.

I don't think jack is broken, cause I hear sound during BIOS diagnostisc as I mentioned before.

Any other ideas? 

Regards,

Mike