I've never had any dead pixel problems, but the Dell PC screens at my college kept on blacking out. It was a problem with the cord connection to the unit, you had to wiggle it to get it to come back on. Very annoying. Sometimes the cords were so bad / worn that they'd have to be just right or you wouldn't have anything. And when they came back on, you got their logo, "display perfection". Suuuure...
Just my two cents.
Just my two cents.