ok I thought maybe you had gotten a screen after you put that card in.

Well I had a motherboard once with a bad AGP slot, I ended up having to send it back.

What you might try, is take the whole motherboard out of the case. Hook up the Power supply, Video card, One stick of ram, and the Hard drive. THats it don't hook the cd-rom up or the floppy drive up. See if that works. If it still does nothing, then more than likely , its your M/B.