First, ensure that the power supply to the Notifier LDM-E32 is functioning properly. Check the wiring connections and power source. If power is confirmed, try resetting the device by power cycling it. If the issue persists, inspect the device for any physical damage or loose connections. Additionally, refer to the product manual for troubleshooting steps specific to the LDM-E32 model. If the problem persists, it may be necessary to contact technical support for further assistance.