Help! PC won't turn on after minor tweak!

[MobyX521]

So, this morning I redid the cable management on my PC so that it would look nicer, as I plan on installing light for the case later on. (I used the part of the case behind the motherboard to store extra cables. When I plugged everything back in and tried powering on my pc, the fan spun and the lights I have in the front of the case tuned on for about half a second before shutting down again!

I believe a short has occurred, but where!?! I need help ASAP - Thanks in advance!

(PS: I'm 80% certain that I correctly plugged in the ront panel connecters on the motherboard.)

 

[USAFRet]

Just go through the whole thing again, checking EVERY cable. Not just the ones you messed with.
All of them. It is pretty easy to accidentally disconnect that, while you were messing with this.

 

[MobyX521]

Just go through the whole thing again, checking EVERY cable. Not just the ones you messed with.
All of them. It is pretty easy to accidentally disconnect that, while you were messing with this.

I have double checked and triple checked... the 24 pin is in, the CPU connector is in, the GPU connector is it, SATAs are in.... ugh

 

[MobyX521]

Update!!! I used the jumper thing that comes with my PSU to test if the PSU worked. When I plug it in, the same thing happens, so I'm guessing something is wrong with either my PSU or the way I plugged it in.. I don't believe my PSU would've just failed as it has plenty of watts and is bronze certified.

 

[USAFRet]

Update!!! I used the jumper thing that comes with my PSU to test if the PSU worked. When I plug it in, the same thing happens, so I'm guessing something is wrong with either my PSU or the way I plugged it in.. I don't believe my PSU would've just failed as it has plenty of watts and is bronze certified.

Is there an IO switch on the back of the PSU?
Is it actually On?
Is it plugged in?