Yesterday I was using my pc and I started hearing a clicky noise and a plastic burning smell. I turned it off and checked. The power cord where it conects to the power supply, one of the 3 "ports" were burnt and melted the plastic on the cord. One of the 3 pins on the power supply that burned it is a bit green and orange, as if its oxidized. The pc is clean and i just cleaned it again to be sure. I have no idea what could be causing this issue please help