I have an Enermax EG301P-VB and I had a balckout while my computer was on. I have surge surpressors, but no ups, so it shut off. When I turned it back on, no problems, but it ran for an hour and a half and shut itself off, so I turned it on again, an hour later same thing. This time it would not turn back on. Could a fuse inside the power supply have blown? Is there a safety switch I need to reset? Please Help!