New build problems. Turns on and off repeatedly

cornix18

Honorable
Nov 21, 2012
8
0
10,510
I started a new build but when it was all connected it and I turn the computer on. It would stay on for 3-4 seconds, with all the fans spinning then turn off. It would do it repeatedly. I took everything off except the motherboard, cpu, and ram. But the problem kept going.

I tried it without the ram as well and it still kept turning off and on. Does this mean that motherboard or cpu is bad? How can I check which one it is?
 


Yea, I already tried it with another power supply and it still turned on and off.