Is this a fresh build? Has it ever worked?
20-pin power connector all the way in? 8 pin power all the way in? RAM, Video Card?
Sounds like it could be the Video Card. I have seen them be DOA. Brand?
Do you have another computer, or access to a friends to check the VC?
everything is connected correctly,i have checked and re-checked,i am currently using this computer, i have taken all components out of my new build and checked them through this dell mid tower.Everything powers up,fans come on,opty drives come on,all LEDs are lit up,etc....