Dead Pixels can be a real show stopper, especially if you bought a new LCD monitor or a laptop. But, the biggest problem sometimes is finding out how many there are out there and if they are enough to substantiate a return.
The Dead pixels test website by Gullaume Dargaud makes the job of testing dead pixels real easy; there is nothing to install. Just click on the links on the site and switch the browser window to full screen. Now, that's what we call a good hack.
Oh BTW, we have had some success by massaging the screen to get some of our dead pixels to come alive.