Why is the fiber optic light on the router off
If OFF: The router is not powered — check the socket, adapter, or power cable. The LOS light on your router indicates the status of your internet connection to the Internet Service Provider (ISP). However, when it blinks red or stays solid red, it signifies a Loss of Signal, a problem preventing your router from communicating. A solid green or orange light means that the service is up and running but is not being used.
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