These inverters are used in multiple laptops, so use the parts number on the inverter it's self and search for that. This MIGHT work, make sure the P/N is the same: http://www.amazon.com/ACER-Aspire-Inverter-Board-PK070009L00/dp/B005FDDEHS/ref=sr_1_fkmr0_1?s=electronics&ie=UTF8&qid=1356303179&sr=1-1-fkmr0&keywords=Acer+7741Z-5731+inverter

A friend sells these Acer inverters: http://www.winchesterpc.com/store/index.php?main_page=advanced_search_result&search_in_description=1&keyword=Acer+Aspire+inverter