'''Jessica Ngo-Ly''' [http://joedotcom.com/2009/05/16/attempting-to-repair-a-chi-flatiron/|these instructions] should get you inside the flat iron. Next would be [https://www.youtube.com/watch?v=AqMs4LHEdQQ|this video] to get to the switch. Now there is the possibility that you may find a replacement switch on mouser.com or digikey.com but you will have to physically measure your broken switch. CHI does not like you to repair your device and will not be off any help