Join Date: Nov 2002
Location: Mississauga, Ontario
I had some dead pixels develop in under a week on my first Sharp LC32D34U. I took it back to the shop I dealt with and they exchanged it for another one, no questions asked.
It would really depend on the store but I know the manufacturers are pretty anal about stuff like that. Basically most say there has to be a cluster of several in a tightly-closed group before they'll warranty it.