The blinking green light on your Xfinity modem may be caused by the service cable not being properly plugged in, being damaged or overloaded, or by a power outage. It is unlikely that you have damaged the cord, but you should be cautious if you’re cleaning or moving around your house.
Resetting your Xfinity modem
If you have an Xfinity modem with a blinking green light, you may have to reset it to resolve the problem. Fortunately, this is a fairly simple process that is effective in many cases. Follow the steps below to resolve this issue and get your internet connection back to normal.
First, turn off all other devices connected to your modem and try to connect only to the modem. It may be that you are overloading the modem. If this is the case, you should disable all other devices except your computer and try to reconnect the modem. If you still have trouble, you may want to contact your service provider to see if there is a local outage.
If you are experiencing intermittent outages or other interruptions, contact Xfinity to learn about your options. Occasionally, the green light on your Xfinity modem may indicate a problem with a part. If this happens, you can also use the Xfinity app to diagnose the problem and contact their customer support. They will be able to send a technician to your location to fix the problem or replace the modem.
Checking if your Xfinity gateway is plugged into the correct port
If you have a problem connecting to Xfinity’s internet service, check to see if your Xfinity gateway is inserted into the correct port. Make sure the gateway is plugged into the coaxial cable, which should be coming into your home from the outside. Your Xfinity technician should have installed this cable for you. This cable looks similar to cable television cords and has a pin in the center. Xfinity provides this cable with your gateway installation kit.
If your gateway is powered by an Ethernet connection, plug the Ethernet cable into the LAN port of your router or computer. Next, connect your Xfinity gateway to the network you’re connecting to. Most Xfinity gateways come with an Ethernet cable. If you’re not sure where to find one, check online for instructions. You can also find a list of compatible retail devices on Xfinity’s website.