Hi Skipper59,
Welcome to the HP Forums!
I would like to take a moment and thank you for using the forum, it is a great place to find answers. For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that you have lost the audio on your notebook. You rebooted it, but no change.
Have you tried running The HP Support Assistant to assist with HP updates and resolving issues.
Here is a document I hope will help. No Sound from the Speakers (Windows 7)
Have you run a hardware diagnostics to test for any failures. Testing for Hardware Failures (Windows
If you would like additional aid , I will need additional information.
Has there been any recent changes to your system?
What exact model of HP computer do you have? How Do I Find My Model Number or Product Number?
What Operating System are you running?
The results from the troubleshooting would also be beneficial.