I think I had about 10-14 (judging from the picture only). If you can see the dead pixel, then I doubt you have 1 or 2. Do you have retina display ?? Look at the picture I posted, and notice the number of tiles (cols and rows) of pixels. I have two columns and two rows that are damaged, intersecting as a # .
All I did was book an appointment at the genius bar and they checked it for me. They saw the dead pixel and said the screen needs replacement. That is all. Good luck and do let us know what happens !!
Thanks for your prompt reply.
Yes I have a retina macbook. Ironically, have already had the display replaced once (LG - image retention issue).
This one was a beautiful retention-free Samsung and now 3 months down the lane I spotted a dead pixel today. Thoroughly tried to wipe the screen with a lint free cloth and made sure it wasn't a piece of dirt stuck or something.
We unfortunately don't have an Apple Store in Berlin yet. So I will call Apple Care and take it down to the Apple Certified Repair Center who also replaced it for me when the image retention issue grew severe.
Will post here whatever happens.