Problem with my new pc. I need some serious help

Ar7980

Commendable
Aug 27, 2016
1
0
1,510
Specs

Gigabyte z170XP-SLI
i5-6600k
16 gb corsair ram ddr4
Corsair cx650m
CM hyper 212 evo
inside the Corsair 400c

Problem

I plugged everything together to see if my build was posting. Everything was seated correctly. When I try to turn it on my mobo lights won't turn on yet my cpu fan is spinning. Every now and then the mobo lights would turn on and the bios would show up on my monitor but that doesn't happen anymore.