My self built computer won't display anything on the screen

[peterspliid]

Hey guys

I've just built my own computer for the first time, and I thought it would be much easier than it apparently is. I am pretty sure I have plugged everything in where it needs to be, but the I can't get it so send a picture to my computer screen. I can turn it on and see all the fans working as they should. The screen however remains black, and i notice that there is no light in the keybaord either when I turn on the computer. I have tried plugging the screen into the video cards DVI input, and the motherboards VGA input

I have made a sketch of exactly how I've plugged everything in, which can be seen below. at the bottom of the sketch, I have inserted a picture of one cable I haven't been able to find a slot for on the mainboard, I don't know if that might cause the problem.
Sketch:
http://img545.imageshack.us/img545/3193/helpn.jpg

Cabinet:
CM stormtrooper
http://www.coolermaster.com/cmstorm_files/CMStorm_Trooper_Manual.pdf

Motherboard:
z77 Extreme
ftp://europe.asrock.com/manual/Z77%20Extreme4-M.pdf

Thanks a lot in advance!

 

[dragonlord12832]

Did you install the secondary CPU power supply? Should be a four or six pin and connect near the CPU. Also, it is possible that you have a bad video card.

 

[unksol]

www.tomshardware.com/forum/261145-31-perform-steps-posting-boot-video-problems

 

[esco_sid]

Try taking out the discrete video card and use the DVI slot on the motherboard. It could also be your monitor or the cable test on another computer.

 

[smorizio]

also try bread board the mb outside the case to rule out you shorting the mb out.

 

[peterspliid]

Did you install the secondary CPU power supply? Should be a four or six pin and connect near the CPU. Also, it is possible that you have a bad video card.

I have installed two power plugs to the motherboard. I have numbered them 2 and 3 on the sketch I posted.

And thanks for the link, I will try all the steps out tomorrow. Thanks for the support!