Installed new video card and no signal problem. I've upgraded my ram from 512 mb to 2 gb. And went to turn on computer I got a no signal from my monitor. The compute boots up and everything. So I replaced the old g-force 7300gs card with a g-force gt 610. And I am still getting no signal. So I even went as far as putting the old ram back in. And switching monitors and still nothing. And the onboard video does not work either. Any ideas.