Have had the tv about 3-4 years now, never have had to change the bulb. A few weeks ago I had the "white dot" problem corrected by a tech that Samsung sent out free of charge to change the chip. Tv worked fine when tech left, white dot problem was fixed. About a week later we were watching the Tv and it just shut off, sound played for a bit with no picture until the set powered itself off. Set will not power back up, unplugged from the wall, pulled the bulb out and cleaned behind, nothing. When I power the set up green light (lamp) blinks like always, set sounds like its trying to power up but then after a few seconds the set turns off and the red light will blink by itself (temp)...the tv will cycle itself on and off this way until I unplug it. Is this an easily corrected problem or is it time to upgrade? I have heard it could be a bad bulb but dont want to spend that 200 that could be going towards a new tv if that doesnt fix my problem.