1). If you register your TV on the samsung website, you get an extra 3 months of warranty. Maybe that will put you under warranty.

2). you can replace the power supply board yourself.

3). there is talk on the forum of just cutting a jumper on the power supply pcb to correct the problem. there are also youtube video's on the subject.

Note: I have asked but nobody has explained the science of why a tv running for a year or more, now needs a jumper to be cut.