Hi Lickus1943,
I understand you are having issues with the sound button working on your HP Pavilion dv6-2162nr Entertainment Notebook. If you follow this document it gives troubleshooting audio problems with external speakers, headphones, and HDMI sound devices.
I would also make sure all drivers are up to date. Here is a link to the HP Support Assistant that will help with that.
http://h18021.www1.hp.com/helpandsupport/hp-self-support.html
Hope it helps.
Thanks