To fix a red LOS light on your router/ONT, start by checking that the fiber patch cord is firmly clicked into the ONT's PON port and undamaged, then power cycle the device for 30 seconds. If the light stays red, check your ISP's app or helpline for an area outage before calling support. However, when it blinks red or stays solid red, it signifies a Loss of Signal, a problem preventing your router from communicating. When the internet light is red, there is a problem with our internet connection that needs to be fixed as soon as possible. Blinking green typically means data.
