Purchased Vizio VT420M on Jan 22 2010 from Walmart. TV was DOA out of the box (sound but no picture). Returned TV to Walmart and received another one. July 2010 TV started experiencing same problem as first one intermittent sound but no picture. Call Vizio, they said to do a reset (unplug TV, hold in the on/off button for 60 seconds, plug TV back in), this did not solve the problem. September 2010, have nothing but sound, no picture at all. Call Vizio for warranty service, they had me troubleshoot a few things and then confirmed that TV needed repair. Told me someone from HD Repair would be contacting me. Next day HD Repair called and said someone would be out in 3-5 business days. 5 business days later no call from HD Repair so I called them and was promptly told that the part was on backorder and they had no idea when it would be in! Called Vizio and was told the same thing that part was on backorder and they had no idea when my TV would be repaired. I told them that this was absolutly unacceptable and I wanted this TV fixed now! They pretty much said sorry for your luck and it would be repaired as soon as they can get the part. This is the worst Customer Service in the industry. I now have an $800.00 piece of junk in my Living Room and no idea when (or IF) it will ever be fixed!! I will NEVER purchase another Vizio product!!!