I have an hp g6-1b60 laptop. AMD High Definition Audio Device. I had to replace my screen because it cracked. When I picked up the computer, there is no sound. There is a red 'x' over the speaker icon and says "No speakers or headphones are plugged in". They claim they didn't touch the sound. Anyway, it says my driver is up to date. I have done System Restore, uninstalled the audio, but nothing has changed. HELP!