Hi....I am having a problem with my Samsung 61" after less than 3 years. The TV will go on fine but after a short amount of time the screen turns black and a little while after that the sound goes off. At that point the red lights on the front of the unit start to blink and it will not turn off without unplugging it. After a couple of days you can plug it in and go thru the same process with the screen turning black etc. It sounds like something is overheating but this unit does not have a lamp...only LED so I am not sure what it might be. Any help would be greatly appreciated.