I just bought a second refurb imac 27 and today when i received it and i started transfering the information from time machine i saw 3 little black dots on the middle of the screen, now i thought dust behind the screen? but i also consider maybe dead pixels? a scratch? Here are the pictures i took from the imac. http://gallery.me.com/rshintani#100010 How do i know for sure if these are dead or stuck pixels? i called apple care but it will take one week or more if i send it to check, so i wonder if there is something i can do to verify if these 3 dots are really dead pixels? or if it is dust behind the screen? What are these 3 points? http://gallery.me.com/rshintani#100010 Thanks! bless you!