The conveyor belt on Bean Bag Toss has a safety sensor system to stop the belt if the area where the bags come out becomes blocked. Check to make sure there is no dirt or debris on the sensors. The transmitter board has a red indicator LED that will be flashing if the board has power. There is a 8 pin connector that interfaces the transmitter and receiver board that can be accessed from the front access door of the game, make sure the connector is secure and there's no damage to the wiring connection to the boards. The sensors output signal can be read using a multi meter to determine if the sensors are operating correctly, see the attached file detailing this process.