Solution
Have an HP Pavillion DV6-FV161AV Laptop running windows Vista. No sound..speakers not working. The following quick and simple fix worked for me! (foundthis on another thread)
Just reinstall the hardware driver by using the recovery feature. Here are the steps..
Start Button - Select All programs and click on the Recovery Manager Folder then the recovery manager file.
-click advanced option
-check "Hardware driver re-installation "
-next
-next again
-choose from list "IDT high definition audio codec driver"
-next
-wait until re-installation done
-restart
-done (thats it).. thanks