screen replaced, will not boot up all the way

I recently replace my screen assembly on my Iphone 6 plus and now when i turn it on it just shows the apple logo for about 10 seconds then goes dark. it repeats this on a continuous cycle. Out of curiosity I reinstalled my cracked screen and it was fine, However when i install the new screen it still does the same thing time and again. Also my computer wont recognize the phone with the new screen.

Turns out it was the camera ribbon cable that was faulty. To see if this is the problem, I unplugged it and booted the device as normal and it worked fine. Replaced the part and is good as new now