Screen Query 1.0 is a freeware utility that "assists you in testing your LCD or CRT monitor for 'bad' / 'stuck' pixels." It performs various test patterns to help diagnose a screen's pixels.
http://www.network23.ca/screenquery.html
Most people can tell when they have a bad pixel, but if not then this program will help pinpoint them, it just fills the screen with various solid colors and if you see a dot with discoloration then you spotted a bad pixel or it may be just stuck so try gently massaging it to work it back to life.
http://www.network23.ca/screenquery.html
Most people can tell when they have a bad pixel, but if not then this program will help pinpoint them, it just fills the screen with various solid colors and if you see a dot with discoloration then you spotted a bad pixel or it may be just stuck so try gently massaging it to work it back to life.