The tiny lights on your modem can be helpful because they let us know about the state and condition of connectivity. There can be a few reasons as to why is your Xfinity router blinking orange. One of them could be internal hardware issue. It can be resolved by a simple process of restarting your device. Turn off the router and make sure to disconnect all cables attached to it. Disconnect the Ethernet cable connecting the router to the modem. Wait for a few minutes and then connect all the cables to their specific slots carefully. Turn on the router to check if it works.