No audio from internal speakers until headphones plugged in

This is for a Hp dv 6 with beats audio.I have no audio from the internal speakers until i plug the headphones in , when I get sound from both the internal speakers and the headphones.
I did find some people had the same issue which was resolved after changes in the realtek HD audio controller but I cannot find the audio controller on my laptop , which I am sure is different from the realtek audio drivers
I have already uninstalled and reinstalled the audio drivers without any success.
avi

Thanks avi,
Take a look at this document and let me know if the troubleshooting steps help to resolve your issue.  Please let me know.
Good luck!
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