I have seen this problem when using a non apple charger and with a non (apple)certified cable on an iphone. Could be the same for the Moto.

Yes the gold piece is the camera ground clip and is held in place with a screw on the upper left of the circuit board. The black piece is a protector that is on the upper left/top of the circuit board for the Screen connection ribbons to bend over and connect to the circuit board.