Today I noticed a dark rectangular area on my 2nd TV. The first one was returned for this same issue. Up until today this dark area had never appeared on this TV. When I turned the TV on later the dark area was gone and has not appeared again. Someone stated earlier the problem may be fixed with a firmware update. Hopefully I will never need that fix. This is my first Vizio and now I am beginning to wonder if I made the right choice. I really do not fell like returning another TV to Amazon but if I see the dark area again, I may have to. That's unless the problem can be fixed with a firmware update.