No power to computer. Won't turn on at all. Working till the other day

So while I was at work my wife called and said the computer will not turn on. She says that our daughter plugged a usb cable into it in order to charge a PS3 remote. The computer was working at this time. She removed the remote later and used it. Upon trying to use the computer later it would not boot at all. When you press the power button nothing happens. No fans spin, no lights come on... nothing.

I removed and tested the power supply via the safety pin method and it is working. I put a brand new power supply in any ways which was also tested. I next replaced the power switch button (not the full cable) and it still does not come on. I noticed after this that my motherboard has an on/off power button and reset built onto the board. Upon pressing this button nothing happens. I built this PC myself less than three years ago and have not had any hardware problems till his.

Do you think my motherboard has suddenly failed? Do I need to replace it? I don't think it is a grounding issue as the computer has sat in the same spot and worked since I've had it till now.

Motherboard is an ASRock P67 Extreme4 Gen3

Thanks.

matts6887 said:

Still sounds like a power supply issue to me. Were you actually able to test the voltage from either or both power supplies? If not i would try and test the voltage to see if its putting out anything. Short of that it does sound like it could be a possible motherboard issue. Also; when you say your daughter plugged in a usb cable to charge something do you mean she plugged a controller in? because the ps3 remotes for the blu ray part of the ps3 does not have a usb port on it to charge batteries. It just uses normal aa batteries.

I did not actually test the voltage but did the safety pin test and both of the fans proceeded to spin on the power supplies. And my ps3 remote does not take batteries but has a removable charging cord.

Golden said:

Have you checked to see that the power cable from the PSU is still fully inserted into the motherboard?

Yes it took it off and placed it back on multiple times, both the power cable to motherboard and CPU.

DocBrown said:

Did you check the port where your daughter plugged in the USB cable to make sure it is not broken, bent & causing a short out of some sort ? Is this USB connected directly to the MB or bay a cable to a MB header connection ?

Thank you sir! There was in fact some damaged pins on the USB. Traced it back to the motherboard and unplugged the USB panel cable... and boom starts right up.

Should of asked you guys before replacing the switch and buying a new power supply!