Gigabyte GA-N650SLI-DS4 nVIDIA nFORCE 650I CHIPSET ATX FORM FACTOR 2xPCI-E(X16)/2xPCI-ELast night I did a multiple Windows Vista upgrade to perfectly working system. Did not wait for it to finish, went to bed. In morning, system had not rebooted, nor will it display boot sequence when I use on/off button to power off and then back on. No beep tones, yet all devices have power. Cleared CMOS, same result. The hard drive access light on case flashes twice immediately on switch activation, again several seconds later after CD and DVD LED's flash multiple times like they always do. I tried using Vista disc for bootup, same result. Nothing.
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