If any pixel error found with Dead Pixel Tester.
DEAD pixels (gray on white) or ON pixels (blue on black) or STUCK (other colors).
Wipe the specified pixel in a circular motion clockwise and counterclockwise with a 100% clean soft cotton cloth semi firmly but not to firm to make the panel flex or bend.
If this fails try the Dead Pixel Tester’s “Launch a Pixel Exerciser”, drag the box from the center of the upper edge and place it over the dead pixel, for 10 minutes or so.
Mostly these two methods used alternately can revive the pixel error!
Works 70-80% of the time for me.
When this don’t work try to download via this link :
Use Plasma GL, a really slick screensaver, to wake up the pixels and give them a work out.
http://www.reallyslick.com/downloads.html
And put this program on for 1-2 hours…