I was putting in a larger HD and all of a sudden my Seasonic power supply went out. I tried unplugging everything and still, no fan movement. I then went out and bought a new Antec PS, hooked it up and then, nothing. Then I tried it unloaded and nothing again. My question is twofold. One, will these power supplies work when not under a load? And two, could something in my PC have shorted out both of these? IF so, what?