Black screen?

[xxdanthemanxx]

Hello,
i put together a new computer. the motherboard ram and processor are new and i know the graphics card and power supply are working. when i turned it on i can see the fans spinning and hear the hard drive but all i get is a black screen. whats wrong with my computer?

 

[dragonlord12832]

You should list your computer specs! Are you sure you seated the GPU correctly?

 

[xxdanthemanxx]

gpu: nividia gtx 550 ti

ram: ddr3 (8 gb)

cpu: intel pentium DC e5500 2.80GHz 800MH

motherboard: intel BLKDP45SG atx lga775

875 watt power supply

yes i made sure my gpu was in. ive triple checked everything

 

[tiny voices]

You have the video cable connected to the GPU not the motherboard right?

 

[smorizio]

on the back edge of the mb do you have the 4 pin white atx power plug connected??

 

[xxdanthemanxx]

there is not video imput on the motherboard. the cable has to be in the video card. and yes the atx power plug is connected