First time build, won't boot up

I recently finished building a gaming pc, but when I turned it on, the fans started spinning but nothing showed up on the screen.  I have it connected to a tv screen with a dvi-hdmi cord, and it only says "no signal."  I would appreciate any feedback.

This is my build: http://pcpartpicker.com/p/17J8K

Try pushing the RAM down a little harder