I boot up a few of the newest LiveCDs found with http://www.google.com/search?hl=en&q=LINUX+LIVECD&btnG=Google+Search&aq=f&oq= to sniff out if it's a software or hardware issue. I always do this first since Windows or drivers may not be the issue.
I have an Acer Extensa 4420. About 3 weeks ago I had to replace my Hard drive which is the same hard drive I had in their before I replaced it. Sense then, my headphone jack has not worked. I am running Realtek High Definition Audio ALC268. I have updated all my drivers. Including ATI, everything! I am just stomped and getting very frustrating with this problem. Any suggestions would be VERY appreciated. Thank You!