PC has no power, PSU is fine, motherboard dead?

[CartRyder]

I just built a new rig and it ran fine for about 3 weeks, i came home and pressed the power button but nothing happened. I've tried 3 different PSU, the 500w EVGA thats in the new system, a 950w Coolmax that i've had in storage, and a 950w coolmax that is in my old computer that works fine. I was unable to get the computer to power up at any time. I have tried bridging the pins on the board for the Power button and still nothing so I"m guessing the case switch is fine. Do you think my mobo is dead?

My build is:

EVGA 500w PSU
AMD FX-6300 6core black edition
EVGA 2gig 950x vid card
1tb HD
GIgabyte 7mlt-usb3 mobo
8gb corsair ddr3 1600.
Win 10 64bit prof

 

[combinebasic]

Yes I suspect the mobo is bad, check also the voltage output of your PSU is normal like the 12 volts and 5 and 3.3, if this voltage are abnormal this will cause not to power on. Now for your last recourse to try to recover your board, try to discharge the BIOS using the CMOS jumper, another remove all removable parts of the mobo and clean it using the thinner. If you can't do this try to replace a good mobo.