If you got stuck pixel (light pixel), then maybe it is possible to fix it, just simply by running the video below (transfer it to your device).

Run it several times a day, sadly N900 does not support "repeat" in the video player, else it would be nice to run this video all night, so you don't have to manually start it over and over again.

Download video here: http://jump.fm/HUAJE

NOTE: No guarantee it will work, on only possible to "relive" stuck pixels, that are light or white (you can see them on the black test above).