MacBook Air won't turn on with no power light? Killed by cockroach? Don't worry! REWA here released an upgraded version of how to fix MacBook Air A1466(Mid 2013) won't power on issue. This video introduced various diagnostic and repair techniques, which includes fault diagnosis by the measurement of voltage, current and resistance, as well as the replacing of resistor, inductor and IC. To troubleshoot your MacBook won't start up problems, please follow our detailed instructions in the video.