The problem has been fixed, oddly it was a firmware update (or lack there of) issue. I have my TV connected directly to my modem & have always been able to use Facebook, and hulu but whenever I tried to get a firmware update it would never work. I am quite disturbed that a firmware update (or lack of) would cause such a major problem requiring a tech run. The tech was very efficient and courteous. VIZIO has made this problem go away, the problem started at 06:15 AM on 09/25/12 and the set was back in use at 11:00 AM on 10/01/12.