Safest way, swap case power switch with reset switch. Then try to boot with reset switch. Otherwise, pull the 2 pin header of the power switch from the motherboard and use a small screwdriver to momentarily short the two pins.
Safest way, swap case power switch with reset switch. Then try to boot with reset switch. Otherwise, pull the 2 pin header of the power switch from the motherboard and use a small screwdriver to momentarily short the two pins.