How would I know if my new iPad had a light leak???
Sent from my iPad 32gb (3rd generation) using iPF
TBH if you need to ask what it is, and your've used your new iPad without noticing any unusual issues you likely don't have a problem anyway.
Just watch a dark scene or a picture with dark or black around the outside, if you see patches of light around the edge then you have a small amount of backlight bleed leaking through. If it's only visible in a dark room with high brightness then It's not a problem and no need to worry about it, but if it's noticable in normal use at normal brightness then it needs replacing. My advice is don't go looking for problems where none exists..lol
Some people are returning units for bad pixels, and rightly so too, a tiny bit of light bleed at high brightness in the dark IMO is acceptable as it will never be visible in normal use, but to have dead pixels on a new iPad is a big no,no for me especially from new. I returned my first iPad3 because it had dust particals under the screen, and I simply didn't fancy seeing it everytime I used my iPad. IOW no-one should hesitate in getting their ipad changed if it has faulty pixels or dust under the screen especially if easily seen, as once you notice them they really start to stand out afterwards, at least in your own mind anyway. Some things I can live with, but not bad pixels on a new iPad especially when I've just paid £659 for it.
A single dead pixel looks like a very tiny black dot on the screen, barely visble, if it's very clearly visible it's likely a cluster of adjacent pixels that are faulty. They can also be partly faulty, a stuck on pixel which is the worse kind to have will show as a brightly lit dot.
Pixel problems are an issue of concern with many people as some companies will claim that to scrap every panel for the sake of one bad pixel would raise the end price of the item, and is why some companies will only replace if there are 3 or 4 pixels faulty. Thankfully these days some monitor manufacturers will replace immediately if just 1 pixel is faulty, especially on the more expensive panels.
One can get a bad pixel at any time, though generally most bad pixel issues tend to occur at first switch on as it was already there, or within the 1st week, IME your unlucky if they appear at a later date, my large Dell monitor which cost me £600 is still going strong after 3yrs with no faulty pixels, though the first one delivered did have 2 bad pixels. I don't think anyone should tolerate bad pixels if they are visible on a brand new unit. If they cannot manufacture them without any bad pixels, then they should stop selling them, and if people did'nt tolerate bad pixels they soon would do. If you get a bad pixel later.. then you learn to live with it, it's not a major disaster, but not acceptable when brand new IMO.