First, my laptop screen pixels are okay. No dead pixels or stuck pixels.
It just happens to annoy me recently. Some of the pixels on the screen (quite a lot of them) become randomly colored after being stationary for merely 10 mins. But if you refresh the screen, those malfunctioning pixels are gone. I can replicate this again and again, but I am not sure if the screen is going to be broken or something. I just bought the laptop 4 months ago.