It does sound like a damaged circuit board. The only way to get the replacement circuit board for your Fan-Tastic Vent Roof Vent is through part # FV807359, which is essentially all the main internal components, including the circuit board, screen assembly, powered lift, as well as a new remote control. Fan-Tastic Vent circuit boards aren't available separately, so this is your best option to get your fan back up and working again. view full answer...