Black screen after putting in new graphics card (Solved)

[OGR3]

Hi Everyone,
I have an old m8530f HP Media Center PC that I wanted to do a little upgrade on. Per some instructions I found on the internets, I removed the drivers for the GeForce 9300ge video card which gave me a black screen. I then shut down manually (as I couldn't see anything) and proceeded to replace the crappy PS with a CORSAIR Builder Series CX500 V2 500W PS and installed a PNY GeForce GT 430 1 GB video card. When I got the case all closed up and plugged everything in, it all sounded fine, but I get no video signal (though I just plugged my headphones in and am not getting the windows startup sound now either). I've tried putting the old card back in, double checking the connections, etc. I have no idea what to do. Can someone please help me?

 

[rolli59]

Both power connectors connected to the motherboard 24 pin and 4pin?

 

[OGR3]

Best answer selected by OGR3.

 

[OGR3]

HAHA, as you were typing that, I believe I was realizing that I had forgotten the 4 pin. Thanks for the super fast response, I can't believe I missed it, but that's what happens when it's my first upgrade I guess. Thanks!