At 3 months and mind you this is in the USA at samsung.com we register the set and get 3 more months then we are so close to being in warranty that they usually cover it.
I'm lost a little here why it was not taken care of way back then. Try the service issues post at the top of the forum and I wish you good luck. I know this is very upsetting but with every maker giving paltry warranties I think on expensive products (cars, etc.) we have to keep them in warranty or pay as we go.
I have a Samsung LED 3D 55" UN55D8000YFXZA 3 months out of warranty began showing about a 4" shaded area at the bottom of the screen. Rebooting the TV would make the problem go away but it soon became more of a problem. I've contacted Samsung support several times with the same results. "There is a problem with the TV" and "It's out of warranty". The TV is 2.5 years old. Each time I call or chat with customer support they act as if I am the only one with this problem. A simple search online and youtube shows several are having this problem. A few months after my problem my father-in-law had a Samsung 50" Plasma with a video control board fail. His was barely covered by warranty. I will never, EVER buy another Samsung product...EVER.