The RTL8211FD-CG is a commonly used Ethernet PHY (Physical Layer) chip that plays a vital role in network communication. When signal loss occurs, it can disrupt data transmission and severely affect the performance of your network. This article provides comprehensive diagnosis and repair tips for resolving signal loss issues related to the RTL8211FD-CG Ethernet PHY. Learn how to identify the root cause, troubleshoot effectively, and implement practical solutions to restore stable connectivity.