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i changed the digitizer and appears 5 lines , an the touch not work where the lines are. i checked again and clean with a brush the connectors, and still the lines. i read that if you dont put the bracket’s screws in the same place, the motherboard can be dammaged. i am afraid that this hapenned to me. please help.

80% chance that the LCD connector isn’t seated all the way or there is some dirt on it. Clean off the LCD connector and the connector on the board with alcohol, then reseat the connector. 20% chance the LCD got damaged when you were trying to get it set back in place. Either way, you’ll need to pull the LCD again. Try cleaning off the connectors and making sure they are seated right and see if that works. If not, then its time for a new LCD. Good luck.