원문 게시자: Michael ,
Hey! Do you hear any beeps as you tried to start it? If yes, please check if you find your code here: https://support.apple.com/en-us/HT202768 and here: https://support.apple.com/en-us/HT1547. In all cases sometimes it helps to reseat the memory and remove all the battery and ac adapter to perform a powerdrain.