The software is called "vision", you need to have version 1.0 or 2.0. It usually ships with your body when you are born!
Kidding...
Just put your face close to the screen (while the LCD is on) and check at various lighting angles and positions you will be able to tell what is a dead pixel or stuck on pixel (one color on all the time i.e., red or blue) watch out for dust specks!
If there is a pixel out, see what Apple can do for you, or wherever you purchased it.
Humour is good, don't take the first comment seriously.
Cheers mate.