Phone no charge after screen change, it gets hot instantly

I just changed a broken screen on my Nexus 5x, and I used a brand new replacement form ifixit, as well as a new battery. I followed exactly all the instructions from ifixit. I also transferred every single small piece of rubber from the old assembly to the new one, but it doesn’t work! When I try to charge, the top part of the chip quickly gets very very hot! What should I do?