Orange, amber, or red lights usually indicate a problem ranging from a firmware update in progress to a lost internet connection. Most of these issues can be resolved with a simple power cycle (unplug for 30 seconds, plug back in). The tables in this article provide detailed information about the possible appearances of the LED lights on each device, the possible causes of each state, and what you should do. And knowing the Modem router lights meaning can save you hours of troubleshooting frustration and help you diagnose problems before they completely. Whether your modem is blinking orange, your router has a solid red light, or you are staring at a mysterious "DS" indicator, you will find the answer below. 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. The LEDs on your modem, optical network terminal (ONT), router, or modem/router combo (gateway) are most likely blinking because they're communicating what the device is doing, or there's an error.