Re: The sound on my HP dv6-3150 notebook is not working

Hi Mary1K. If the lack of sound is a driver issue, you can restore the original "IDT Audio" drivers using this method: Using Recovery Manager to Restore Software and Drivers (Windows 7)

If that doesn't help, try the troubleshooting in this document: No Sound from the Speakers (Windows 7)

Let me know how it turns out.