I've had my Samsung 43" (Model: HLN4365W) about 3 years. Never had a problem, but now, sometimes (always in the same spot) I get a little white pixel that shows up.
It comes and goes, very weird. Any idea? Could this mean my lamp is going? This just started happening.
I had the same problem and after contacting Samsung they asked me to switch to cable instead of satellite and WHALLA! pixels re-lite. Have had same problem several times and it is the satellite signal. This could be your problem, so, I hope this solves your problem. We haven't encountered the problem since they changed the dish and HD box.
Unfortunately, it didn't work for me. I tried hooking up my HD DVD player (with the DVI connection) and I even tried getting a different cable HDMI instead of using component, but it's still there. I think it's time to call Samsung... ;(