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High performance tablet computer released by Apple on November 11, 2015. Model A1584.

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Dead spot in new digitizer. Replaced twice. Dead spots.

Customer brought in an iPad Pro 12.9" with a cracked screen. I replace the screen and soldered the new one on properly 100%. Customer has issues with the dead spot on the screen. So I ordered a brand-new digitizer assembly and install that one. Exact same issue as the first one. Anybody have any suggestions? No apparent damage to the control board and soldering is good. Thanks!

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Same supplier? Seconds?

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Different Supplier. LCD is good on both.

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then the controller board is bad, simple

Update (11/11/2016)

sounds to me like proccess of elimination its the controller board, too much heat, etc can damage a controller board, hope you find a solution.

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lcd is not ok failure

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LCD is perfectly fine on both. Ordered from 2 separate manufacturers, dead spot in same exact area.

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