If I leave the paperclip in and use the PSU switch then, nothing happens (after the first time) when I turn the PSU switch off and on. I turn on the switch, LED flashes a few times then power cuts off (and stays off). Only way I have found to 'reset', is re-seating the paperclip. I am wondering if something is shorting out, but have tried 5 blades, 3 PSUs & 2 molex adapters. I verified polarity. Tried 2 wire and 4 wire configurations. Tested fuses. No idea what to do next.