If the pixels are changing colors, they're probably not stuck pixels, but part of the signal being sent to the TV - which may point more to the electronics rather than the LCD panel itself.
Does this happen on all inputs? If not, what do you have connected to the TV, and which inputs does this symptom appear on?
I purchased a 52 inch Lcd Samsung about 2.5 years ago. The model number is LNT5265FX. I now have appx. 3 lines that run vertical on the left side of the screen. These lines are red/blue/green and sometimes a yellow. These lines however disappear after approximately 1 hour. From researching the internet I believe I have stuck pixels and these are quite fixable. Is there something I can do myself to fix this or do I have to seek professional help?