Firstly, ensure that all cables are securely connected and that there are no physical damages. Check if the power supply to the LNL-1100-S3 is stable. If everything seems fine physically, try rebooting the device. If the issue persists, check the network settings to ensure the device is correctly configured. Additionally, review the event logs for any error messages that might provide insight into the problem. If the problem persists after these steps, it may be necessary to contact technical support for further assistance.