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Ok, i opened up a phone yesterday to see what sits right behind the LCD. Right behind where the dots can form is a chip sitting on a piece of mental about as thin as a piece of paper. this piece of metal is tapped flush with the back of the lcd. I'm thinking its just heat from that chip if you leave the lcd on. i put some heat tape that is found in cellphones between the two. hopefully i will never get the white dots.
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