I'm very sorry for any inconvenience this may have caused you. Unfortunately, this sounds like it may need servicing. Here's the thread where you can get details on setting that up: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/
I have a 32 inch Samsung that's about 2 years old. After about 13 months, the TV lost its picture but still had sound. I've just now gotten around to messing around with it.
I looked at the capacitors on the power supply and they all look good, but I noticed that with a strong flashlight I could still see a picture on the TV, so I figured it was probably the power inverter. I replaced the power inverter, and now the TV is totally black, no picture at all even with the flash light, and there is a buzzing sound near the inverter in the back of the TV. The inverter is model SST-4UA01
I put the older inverter back in, and the picture came back, but the flash light was still required to see it.
Is the new inverter that I received also faulty, or is something else going on here?