Problem with build new pc

Yeah I did all atx and PCI express cables. Fans were spinning.

I've got it thanks guys I reseated everything, inc processor. And reset BIOS although that shouldn't matter

It worked.

Thanks
 
I got a cheap replacement PSU for testing and this has seemed to boot the PC again fine.

Which would show that the problem is down to a faulty PSU!

Though is it?
I can not get any USB devices connected properly.
We have an iPhone 5 here, nexus 4, USB hub, USB keyboard, usb pen drive.

The Keyboard, usb pen drive, the hub works any sockets (usb 2 and 3), but if we plug in any of the phones they display a charging icon but the computer doesn't detect them.
Problem with USB power?

When plugged in the nexus 4 doesn't come up with its usual screen, windows displays the last USB device you plugged in has malfunctioned.

I wondered if it was a windows problem, then i tried the live knoppix CD and when plugging in the devices nothing happens.

I also noticed once plugging the iphone 5 into the front usb 3 and removing it, immediately made the computer go off, well the screen went blank and the PC needed to be rebooted.

The guy I built this for said the USB ports weren't detecting his phone before, when the original PSU was in it.

Could the MoBo be faulty? I've updated it's bios and drivers in windows.

Never had this much trouble with a new build before :(!
 
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