try a lamp in the outlet make sure the outlet is on and working. if it is test the power stip if your using one. on new pc most now have power good led on the mb see if it on. if it blinking there a power issue. if it on and no power....try clearing the cmos see if the mb locked up. if the fans twitch and stop pull the 24 and 8p power plug from the mb jumper the 24 pin power supply green wire to black see if the power supply turns on. if not bad power.