I have a PN58A550 and after 4 years of ownership, I am now having the cold start up issue where it turns on and off along with severe static noise at times and bad picture. It's now to the point where I have to leave the TV on for almost 20-30 minutes before I can get a good solid picture. I am now thinking if I should call a service technician or just get rid of it and buy another HDTV. Here are some youtube videos of my issues and is this due to a bad power circuit board?
Part 1 - first initial startup in the morning. It just turns on and off.
Part 2 - Screen then turns pink after 5 minutes then shuts off and turns on again.
Part 4 - few minutes later I get flashing blue things then turns off and on.
Part 5 - pink/purple screen and again it turns on and off.
Part 6 - after leaving the TV on for more than 20 minutes, I get the Samsung screen saver. I turn on the receiver and I get the noise and bad picture and its turns off and on.
Part 7 - Bad picture and bad noise that lasts for a couple of minutes, turns off then on, and everything is ok.