Need help troubleshooting build

bowhawk000

Honorable
Sep 6, 2013
20
0
10,510
Just got parts for a mostly new build.

fx8320
gigabyte GA-970A-UD3P AM3+
radeon hd 7950 (used in last build)
hdd (used in last build)
ssd (used in last build)
cdrw (used in last build)
corsair cx600
g skill 16 gb (used in last build)http://www.newegg.com/Product/Product.aspx?Item=N82E16820231422

Not sure exactly what the problem is. Fans power on. GPU powers on. HDD and SSD power on. Optic drive has power, although when I open it, it pops out and immediately closes. CPU fan powers on. Peripherals do not turn on (keyboard, mouse). Screen does not turn on, completely black.

Any help is appreciated.