Have I junked my PC? BSOD

Hey folks,

I fitted a pci firewire card to my mesh pc. After I booted up and couldn't get the card to work I discovered it isn't compatible with Vista. The pc was running fine at this point, I then had to feed the kids etc so the pc was running with the pci card still fitted, once the kids were sorted I used the pc for about 20 min and the screen went black, I checked the leads etc all ok so I thought restart, I pressed the power button and it didn't shut down so I switched it off and removed the card and it still ain't run. Dvd drive works, the fan runs, but the hdd access light doesn't flash. Any body got any help?
Thanks
 
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