According the creators of killdeadpixel.com by simply dragging a 64×64 graphic (the one displayed at the right) to your dead pixel and letting it stay there for about 1 hour, the dead pixel will come back alive again.
The graphic will try to massage the dead pixel :-)

It has been reported to work many times. But it doesn’t work for all dead pixels.. still its a good try. If after 1 hour it doesn’t work, you can use the full screen version and try for about 12hours.

Good Luck