System not starting

Th_SkyDreamer

Honorable
Apr 21, 2013
2
0
10,510
I've recently completed a build, but when I try to turn it on, nothing happens. I've checked all the wires multiple times, and the power switch is on. Also, there aren't any bent socket pins. What's wrong? Is it the motherboard? I've tried with only the essentials (cpu, motherboard, hard drive, etc) but the result's the same.

System specs:
i3 4150
Asus h81m plus
Antec Hcg 400m 80+ bronze
Msi r7 265
Seagate barracuda 1Tb
4gb kingston hyperx ram
Lite on ihas 124-04
Silverstone ps10b
Aoc i2267fw
Cm storm devastator