Why won't my monitor display?

dion15

Honorable
Aug 8, 2013
2
0
10,510
Hey, Im builing a custom computer and i have everything setup and i have it all ready to go and get to installing drives but my moniter says "No signal input found" and my usb ports won't work either if you know anything please help!

MOBO: Asrock amd 970 pro3
CPU: AMD athlon II
GPU: EVGA GeForce GTX 660
SPU: (some sort of 550w dual fan)
RAM: 2x 4gb RAM
and my harddrive and stuff is alright i just needed help with just those so if you know anything PLEASE HELP!!
 

dion15

Honorable
Aug 8, 2013
2
0
10,510
everything runs the graphics card fan runs, the case and cpu fan runs all good but just my vga hookup wont work; im using a dvi to vga component of some sort and the video doesn't show