If it is still under warranty (which it may be) Vizio may repair it due to the problems they have had with the USB ports.
Doesn't hurt to ask and it may be free.
Just a reminder - if you send your unit in for warranty repair you may NOT get your actual unit back! All data will be lost, including pics, favs, emails and other personal data saved on the tablet! Remove data card and export all data etc. Before sending it in for repair! It would be a good idea to reset to factory default Before you send it in, it erases EVERYTHING on the tab so make sure you back up everything first. WOOT. COM just sold a bunch of refirbished motorola tabs that still had previous owners data on them! Remember you PROBABLY WONT GET SAME UNIT BACK - It will be a refirbished unit in most cases.