I have had my M3D420SR 3D set since 11/25/11. It worked great until yesterday when I got home and tried to turn it on it would not do anything. No flash, no click NOTHING. The set is getting power because the front VIZIO light is lit and the Optical light on the back is lit. The internet connection (which is usually lit and sometime flashes) is not. From what I understand this is a common problem with Vizio's. The tech support asked when I bought it and where and they said it was still under warranty and scheduled a tech to come out. Tech support did not ask if I still had the receipt ( I can't find it). I am hoping the repair man will fix it but with my luck I will be SOL. Has anyone else had similar problems and did the repair man ask to see a receipt?