help me please

Apr 21, 2018
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hello everyone I need help from all my fellow pc builders, so I just built a new pc put everything together by the book, so i go and turn it on, and all the fans and lights turn on then off, so i check all my cords, check everything, its all fine so i try again and it does the same thing, so I start unplugging my gpu and my memory and my cpu, and fans, i plug back in my gpu it turns on and runs fine, now i plug in my fans and everything, it runs fine, I plug my memory in it runs fine, now i plug in my cpu it turns on then off right away like before, so its a cpu problem, i check my cpu cord and my motherboard, I replaced my motherboard and cleaned my cpu and i put everything back together and it does the same thing again. Please please help me i dont wanna waste anymore money. Here’s my parts

Intel i7 8700k
16 gb vengeance ram
2tb seagate harddrive
msi GTX 1060 twin frozr VI
Msi B250 Gaming M3
Evga Supernova 650 g2
Cooler Master 240 cooler
NZXT H700i Case