I just finished my build, and I am sure everything is in correctly, as I've checked multiple times. I connect my monitor which I just bought a few hours ago, and nothing but colored lines pop up on screen. I have no clue what is wrong. I've check to see if the graphics card was in, and it is. DVI cable is virtually new.
with the power off check that the video card is locked into the mb. on the video card check that all the power ports are filled some cards have two six pin ports some have a six and a eight pin port. also on the mb check that the 4/8 pin pci power plug is filled.