vista update kills motherboard???

This has been posted elsewhere on the forums but I'm just trying to cover all the bases.....


I have been running vista ultimate 64 stable for several months now on a new build. However, after downloading and installing service pack 1, it sent me to a blue screen, did a memory dump, and then the computer would not reboot again. It powers on, albeit just the case lights, and fans but will not post to BIOS, just a black screen. The monitor doesn't even come out of sleep when the computer is powered up (tells me there is no signal). I have removed all but 1 gb of ram, disconnected the HD's and all other peripherals and tried rebooting again, but nothing changed. Could the update have killed my motherboard? Any suggestions would be greatly appreciated.

phenom 9600
msi k9a2 platinum
4 gb kingston hyper X
coolermaster pro 1000W
two HIS 3870's in crossfire
two samsung spinpoint T series 500 gb in raid 0

Thanks,
Brian

Thanks, I'll give that a try before systematically dismantling the computer further, testing each stick of ram and individual video cards.