PSU blowout, but still working??

So, obviously, I require help with my situation:

I returned my Corsair PSU because it spontaneously blew out one day, and nothing worked. Got that new one in the mail a couple days ago, was the happiest day ever, just like Christmas. I plugged this new one of the exact same model in, and the SAME THING HAPPENED. There was an electrical snap, and then nothing. I tried turning it on a couple times in vain, until the fourth try worked! Hallelujah! But I quickly realized the system didn't boot. Tried a few things, like switching the RAM card to a different slot, powering on without the graphics card, etc. to no avail. It actually got worse. Now instead of powering on and not booting, it powers on for half a second and then dies. Each time. I tried this thing called resetting the CMOS, witch I followed completely, and that didn't work. Now, I'm stuck with my life's greatest achievement not being worth more than scrap metal. Is this ANOTHER defective part from Corsair? Did I get another defective PSU that blew? Or is there something wrong? Any constructive feedback would be greatly appreciated. Thanks!