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Re: white spot on screen
Sounds like you are describing stuck/dead pixel.
There is no fix, it is a Pixel gone out in display panel, good chance it is just stuck and will right itself but sadly sometimes they dont and the only fix is to replace the entire display panel Manufactures warrant such defects different depending on amount of dead pixels on screen is considered faulty, ie 3 pixels grouped or 5 separate ones .
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Hello, I have exactly the same problem with the exact same TV, white screen for about 15 minutes and than image appears perfect as if nothing happened. I have asked an ebayer which sells TV parts and he suggested it could be a main board or tcon board. I am quiet hesitant to fix my tv, but if the tcon board would fix it, i'd go for it. Did You manage to solve the problem yet?
It is the chip that controls the millions of mirrors inside the tv. If they are black, they are stuck closed. If they are white, they are stuck open. I JUST had the same the same thing happen with mine. I bought it 3yr and 2 months ago and I had an extended warranty on it for 3 years. Well, needless to say, it was out of warranty and I was pissed. The store I bought it from suggested I call Samsung. Which, I did. They asked for the model number and told me that my model (hlt5675sx) was one of the ones that is covered becasue they had a problem with the chip. Within 2 weeks, my tv was fixed by a repairman who came to my house. It works perfectly, now and it didn't cost me a penny. Good luck.
Mine started with only one small white dot..... just a week ago, now I have a freakin constellation!!!! (at least 30) . I am gonna call samsung today to see if they will cover this even though it's out of warranty. I believe it to be the micro mirrors
IN your statement says tv is second hand and also you tried degausser method also. The problem is permanent magnetic field affected your tv set. So the best recovery is fix one button magnet in the affected area.