Clean optical connectors with appropriate fiber cleaning tools if it is an optical module. Reseat the module firmly until it clicks into place. Ensure the patch cable is fully inserted into the module. This is typically due to one of the following failures: hardware defect, poor seating, or incompatibility. If it is not a Huawei-certified optical module, replace it with a Huawei-certified optical module. An optical module is a critical component in modern optical communication systems, directly affecting transmission stability, network reliability, and operational efficiency. However, during installation and daily operation, various issues may arise. After analyzing the specific reasons, the most common problems are concentrated in the following aspects: 1.