Replaced screen on one plus two but have an issue after booting

I replaced the screen and since then when I try to boot the device I get to a screen that says powered by android and then after it bypasses that screen the screen goes completely dark and afterwords once it has finished booting up I can use the buttons and it has sound(my alarm went off) and the screen just remains black like it is powered off and I have taken it apart and put it back together a few times to make sure that everything is connected and have seen multiple youtube videos and when I attempt to do a fastboot it gets stuck on the fastboot mode screen with the oneplus logo and just says on that and never seems to finish