I have purchased a Vizio XVT3D474SV 47" LCD TV last August. I worked fine (I was quite happy with it actually), but recently I noticed a cluster of 5 dead pixels on the screen. I have called up Vizio support a week ago and they asked me to send them the images of the dead pixels. They have later called me and confirmed that they see 5 dead pixels and that I should get a replacement under my warranty. At that point I was very pleased with Vizio customer support.
Today I received a call from Vizio and was told that what looks like dead pixels actually is some kind of insect/bug stuck behind the screen and that the warranty does not cover it. Hence my replacement was canceled.
Right now I am not really sure what to do. I feel it's very unlikely that a bug 5 pixels big crawled into my TV. Those pixels look like dead pixels to me. Maybe someone can take a look at the images and tell me what they think?
I attach the photos I sent to Vizio.