Motherboard or power supply failure?

So my computer just died. It completely shutdown like it lost power then tried to boot up again bit failed. Tried again and got started up. I didn't really think much of it at first. When I got back into windows I Tried to open a program but when it shut down again with shutters of life. I got it back up once to do a system restore but it shut down mid way. A few times I was able to get it to the bios menu but everyrhing looked fine. After that I got into windows and the second I opened an app other than the Asus suite it shut down. I have yet to be able to get the motherboard to start up beyond a red flash and a spin or two on the fans. Now it won't even do that. However the green power light on the mother board is lit. But when I try to power it on it does nothing.

I have a ASUS z77 pro and a Corsair TX850. Both brand new bought. Not even two weeks ago.

Any help would be great! Thanks in advance.
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More about motherboard power supply failure
  1. You can test the power supply with an ohm meter; it's fairly easy. Here's 2 links:

    I wouldn't try powering up again unless you have a spare ps. I would also remove the board and inspect around it and under it for any extra screws or wires and clean up any clutter around the board before mounting it again. You can also breadboard it to test it for a post screen. Be sure to request an rma for the ps even if you buy another one; you can sell the replacement later. If the board still won't post with a different ps, then inspect the board for any burnt marks. If it's clean and has no visible damage, you can request an rma from asus. They will inspect it carefully, so be sure to do the same. Good luck.
  2. Thank you very much for the guides! They really helped me out. I think it is a power supply issue, the PSU is not keeping power and will shut down. I think this is the case because the voltage looks good on the bios screen but after letting it sit for about 10-15 it powered down. It's an external build with just the cpu, fan, memory, and monitor connected.

    Here is a picture of the bios screen.

    When I did get into windows with my SSD it worked fine idling until the SSD was no longer detected. It appears it lost power.

    I have a friend with a PSU tester. I will see if I can read any instabilities in the PSU.

    Thank you again for your help.
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