Apple revises its internal policy on whether or not to replace a display based on the number of dead pixels, from time to time. Boy Genius Report has got hold of a document stating Apple s new policy regarding dead pixels for iPods, iPhones, MacBooks, iMacs and Apple Cinema Displays.
As you can see in the chart in the above screen grab, you can get your iPod touch or iPhone screen repaired or replaced even if it has a single dead pixel. But you won't be as lucky if you are an owner of an Apple Cinema Display, 22-inches or larger, because the policy states that it is acceptable for such displays to have up to 15 dead pixels. Only if it exceeds 15 dead pixels, Mac Geniuses are allowed to replace it. Once such a screen is replaced, it is no longer eligible for further replacement.