The psu powered all 4 of my fans, my dvd drive and my hardrive. I also plugged in the 8pin atx onto the motherboard, it didn't power up. The lights do not come on and no fans from the motherboard, this is when the 24pin connecter is bypassed with my paperclip in the green and black wires. When the 24pin connector is in the motherboard the psu will not power anything, so which is failing? Or both?