How about the possibility of shorted connections via the case stand-off
nuts? Can you try booting the system with the motherboard out of the case?
Just an idea, and maybe if it works out of the case, you may need fiber
washers at the screw-down points or fiber/plastic standoffs.
Larry Hooper

Edwin Bogert wrote:
>
> I recently purchased (2) brand new Biostar M6VCF mobo's and, installed
> them in mid-towers with 250watt power supplies.

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