Power trouble?

[otaku1012]

I built this comp about 4 months ago and this morning I went to power it up to do some gaming. Loaded bios and started to load windows then cut off. I tried turning it on again and same thing, would start to load for 5 to 10 seconds then cut off. A few times I got it to load completely into windows but after a min the power cut off. Now it won't even turn on. Checked all connections and nothing is loose. I'm going to trade psu's with a buddy to find out if that's the problem but until then I wanted to get some input as to whether this sounds like a psu issue or maybe my motherboard crapped out.

 

[otaku1012]

Guess I should add what I'm running lol.

i5-2500k @ 4.3
8gb corsair vengeance
gigabyte p67 mobo
corsair 850w enthusiast psu
radeon hd 6870

 

[nate_09]

what you can do now until u get your buddy's psu is to try a paper clip test. disconnect or take your psu completely out of your case, you can use a case fan for eg to test it. find the 20/24 pin mother board connector, there should only be one green wire, what you do is bend the paper clip into a 'U' shape n let one end make contact with the green wire, and the other end contact with any black wire. when u do this if the fan spins and then cuts off after 5-10 secs as u said..then u know 4 sure its your psu, if the fan spins up n doesnt cut off..problem..just may be elsewhere. its nt definitive but itl help

 

[ko888]

Video on How to verify your Corsair PSU is working:

http://www.corsair.com/content/tabs/videoplayer/id/1


How-to Test Your Corsair Power Supply instructions with pictures:

http://www.corsair.com/blog/Testing-your-corsair-power-supply

 

[otaku1012]

Did the paper clip test and my psu is fine. Think I've figured it out now. Booted my pc with nothing attached and after windows ran for a good 5 mins or so I went to plus my keyboard and mouse into my front usb ports. As soon as I did my comp shut off. Did this a few more times so I think there is a short there. Didn't know a usb port could do that. Anyone ever heard of this happening before? Not a big deal, I just use the rear ones now with no problem.

 

[ko888]

Did the paper clip test and my psu is fine. Think I've figured it out now. Booted my pc with nothing attached and after windows ran for a good 5 mins or so I went to plus my keyboard and mouse into my front usb ports. As soon as I did my comp shut off. Did this a few more times so I think there is a short there. Didn't know a usb port could do that. Anyone ever heard of this happening before? Not a big deal, I just use the rear ones now with no problem.

Yes. I've heard of miswired front panel USB ports burning out circuit traces on a motherboard.