In my experience, monitor makers always set a minimum threshold before they will consider a monitor faulty. I've seen it time and again (originally with laptops) where there are perhaps only 2 pixles gone. So we'd phone the manufacturer only to be told there needs to be a certain amount WITHIN a certain area before they declare it faulty.. You could try taking it back to where you bought it and trying to sweet talk the customer services dept, but there isn't any official redress. Unfortunately every manufacturer has different policies and they aren't very well known unless you are put in this situation.
Sorry it doesn't look more positive...