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I have a iphone 6 A1549 And there are white vertical lines on it. The screen and battery are fine cause i just bought a rose gold iphone and swapped screen and battery onto mine. It has never been exposed to water.
Hi @thomas4204 Seems to me like you have a bad screen assembly. I recommend getting a quality replacement screen to fix your issues. You can get one from the iFixit Parts Store or pick-up a good one from Mobile Sentrix (premium is best). Best of luck getting it working!
Did you drop it? And the screen sometimes become unresponsive ? Check on google about “touch disease iphone 6” and if the symptoms are similar then you have an answer
