Reboot loop after replacing frame and screen.

Hi! I ordered an iFixit essential electronics toolkit from the EU store and a new frame and screen for my Honor 8 Lite (P8 2017). Once I finally got them, I replaced the broken screen and bent frame, but once reassembling everything and booting the device, I get a black screen with EMUI logo requesting me to reboot the system, doing a factory reset or wiping the cache. I tried factory resetting and wiping the cache, but it still reboots to the very same screen. I've re-seated all connections twice now and I still have the problem. What I am more curious about is why it does this, after all the only part it could know has been replaced is the screen. Please help!