My PC with a Corsair VS450 PSU gives fanspin for a split second and turns off. It won't even give fanspin on trying more until I wait longer and then the same thing repeats. I put a different PSU and it's working perfectly and this PSU is giving the same problem when tested with 2 different systems too. I did the paperclip test and the fans of the PSU keeps spinning normally when the green and black are shorted. Please help me out. When I searched online most of the threads where pointing to motherboard shorts.