Hi, I have a Dell Inspiron 1720 and the sound is not working. I have Stigmatel High Definition Audio Codec installed. It was working perfectly up to Yesterday. I had my laptop hooked up to the tv and sound was fine until I disconnected it from the tv. I have uninstalled it and reinstalled it, but that did not work, when I go in to sound it says everything is working fine, but even when I have volume up full, there is absolutely no sound. Can anyone help me with this problem??