I have a 1.7 Ghz Intel Celeron processor and a 32MB integrated video device. I wanted to play WoW so I bought a Chaintech 128 MB video card. I tried to install it, but whenever I plugged it into the AGP port the computer turns on into nothing, blank black screen. The power button also does not light. I've tried disabling the integrated video, and still no luck. help plz?