Powering my CPU is causing my PC to cycle powering on and off

[toastygoodness3950]

First time PC builder here;

My build worked for a week or two, and then things started to fail. First, it was my USB mouse and keyboard not working sometimes, which a reboot would fix. Next, my network card stopped working, something I got around with a USB adapter. But now, my PC will start, run for a second, then turn off and then try to turn itself on again, cycling this pattern if I allow. I've taken it apart, and built it over outside the case, and I've determined that the boot fails if when my PSU is plugged into the CPU power port on my motherboard. I've tested my PSU, and it works fine. I've also tried to reseat my CPU (an i7), and it doesn't help. Does this mean I need to return my CPU, or is there a simpler issue I'm missing?

 

[Emerald]

What kind of motherboard and PSU are you using?

 

[toastygoodness3950]

The mother board is an ASUS Z87-A and the PSU is an EVGA SuperNova Nex750B. The CPU is an Intel i7-4790 LGA1150.

 

[alexoiu]

When reseating the CPU have you checked the pins in the socket, to see if there's a bent one?

 

[toastygoodness3950]

The i7 that I have doesn't have any pins, it seems to connect through flat metal plates.

 

[alexoiu]

Check the socket on the motherboard.

 

[toastygoodness3950]

Nothing looks out of order in the socket. Is there a way to tell if my CPU is dead?

 

[alexoiu]

If testing it in a known working motherboard. I suggest RMA-ing both motherboard and CPU, if under warranty.