I have an iPhone 6s that has lines through the display. I replaced the display with a working one which I tested on a different 6s and then the working had lines trough it. I also put the old one on the other 6s and it worked. I don’t know what to do since I soft reset, hard reset, restored and DFU restored. I think it’s a problem with the logic board but I’m not certain, anyone have any idea that would be helpful.