Ideas on why controller will not turn off off USB

I recently took apart my controller in order to replace the RB Switch as it had stopped working. Upon replacement of the switch and reassembly I discovered that the controller would not turn on when pressing the xbox button. Hooking it up via USB did work and the rb button was functioning properly. I considered that perhaps some of the traces had burned around the switch but it is difficult to detect any actual damage. Any thoughts on possible issues?