Actually I was changing screen settings for more comfortable option for my eyes, and dead pixel just disappeared.
On the black screen I dont see any red pixel, I will thy to change diffrent colours.
Can anybody explain is this possible that pixel just started to work properly? =)
Given it was red it was more than likely just a stuck pixel (rather than a dead one) and when you forced it to repaint the screen by changing settings it just got itself unstuck.