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crazy4ts
Under Power Management in your BIOS check to make sure ACPI is enabled.
Also make sure the power button wire jumper is fully inserted over the power switch pins. I've noticed on the M2s if the jumper is not all the way down over the pwr sw pins or it's crooked the motherboard won't turn on. Maybe that's the case with the M4s.
Another thing to try is make sure you have the polarity right on the pwr switch pins on the motherboard and play around with it on the PSU side. Polarity shouldn't matter, but it's happened a few times in the past where some motherboards are finicky.
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