"Most people have been complaining to Sony about their stuck and dead pixels. Well I have done my research and I heard about a guy over at psphacks.net that had a LCD TV that had some stuck pixels and when he went to Best-Buy they gave him a dvd that flashed Red, Green and Blue over and over again. This supposedly "un-sticks" the stuck pixels, by calling them to do rapid changes (To my understanding). So I thought about it for a while, and I said, what the heck, I'll try it. So I made my own video that does this, and it works!" says a post by Nick Toohill at PSP Vault.
You can download the video there. I haven't tried it, but in the comments, some people claim that it works -- and some that it doesn't. Either way,m it will not work on pixels that are dead (unlit), only ones that are stuck on a solid colour.