I just bought a Sapphire ati x1650 pro 512mb agp card because my PNY GeForce FX 5700 VE 256mb died on me. When using my geforce the screen says no signal and then stays black. I'm trying to use the ati but my screen on start up just keeps flashing. I know it's not the new card but something I haven't done. I cant get to my desktop what do I do, I have hw to submit. PLEASE HELP. thanks in advance to anyone who helps. I'm using an HP Pavilion a1012x.