If it's just one dead pixel, then Dell might not fix it under warranty. I know some TV manufacturers won't bother if it's just one pixel.

Give Dell a call / email and see what they say.

Don't try to fix it yourself, I know there's methods out there for doing so, but you could end up damaging the screen and void your warranty.

Remember you have 21 days to return the laptop for a refund, so keep that in mind if Dell won't repair it.

it is in the line of sight when i do programming on CMD or when my screen is red or green it shows a dead pixel

. it is on the center ( somewhat 100 pixels right from the center of the screen)  of the screen

www.dell.com/.../ArticleView

1 - 5 dead pixels is considered normal under the industry's standard. Therefore, you may have difficulty getting the screen replaced under warranty. You need to discuss further with Dell.