s10473

Hello everyone, I have a sound issue. I have a HP Laptop Pavillion dv6000 with Vista home premium 32bit. It started off with no sound when windows logs in, and internet explorer movies example youtube. I have been on-line with HP tech support 6 times yesturday trying to resolve this with no luck, only making it worse. Now I don't have sound for movies, windows sounds, but I now no longer have sound with media player and I am unable to change my windows sounds from the control panal. Which I had before tech support. Please guide me to fix this issues.