A red blinking LOS (Loss of Signal) light on your Huawei router indicates a fiber optic signal issue. Check the fiber cable connection for damage or loose fittings. Ensure the optical network terminal (ONT) is powered and properly connected. This can be frustrating, but there are several steps you can take to troubleshoot the issue and get back online. When it's green and steady, everything is fine. However, when it blinks red or stays solid red, it signifies a Loss of Signal, a problem preventing your router from communicating. If your router's indicator slowly flashes orange (or red), it indicates that it has discovered a new device that supports HUAWEI HiLink nearby such as a HUAWEI router or phone running on EMUI 5.