Dead pixel or what??

I have a small grey blob about 3 pixel by 3 and its annoying me.
when i turn the laptop off or to screen, i cant see it but when its on its always there.

its not on the case as iv tried to clean that.
i cant remember how long its been there but now i notice it, its annoying me.

Its not black or white like usual dead picels and not a perfect square like normal dead pixels are.
Iv heard about dirt under the screen but iv looked at it in a bright light while the laptops off and i cant see it ??

 

If you have a *dead pixel* and it's bothersome like that, use your warranty...Call Dell and have them fix/or better yet, just replace your screen with a new one.

You should be able to look at your screen clearly..with no *discerning or distracting* issues.

Cin...

 

Ok, i called dell 24x7 support and they said that they are going to replace the screen. thats great support for just one dead pixel or maybe dust(not sure which)

Does anyone if they replace the screen only or the whole lid/top case?

 

That sounds like dirt.