Common Fixes
Check the cables. The cables should be tightly attached to the wall and your modem; loose coaxial cables can lose data, and a loose power cable can provide insufficient power. If there are any splitters between your modem and the coaxial port on your wall, make sure all the cables entering and exiting the split are snugly secured. Also check that the pin inside the coaxial cables is straight. A bent pin indicates damage and prevents internet connection. Replace any damaged cables.
Restart the modem or gateway. A random glitch can be causing the blinking green light, and restarting it can be an easy fix! To restart, unplug the modem's/gateway's power from the wall for a few minutes, then plug it back in.
Check for a Cox outage. An overall internet outage or maintenance outage can cause your router to blink green. Call the local ISP office to see if there's an outage; you can also check their website for additional information.
Update the firmware. Outdated software causes many issues, like a blinking green light. You can generally update the firmware by opening the app provided to you by Cox. Alternatively, go to their website, log in, go to System Settings in your router/modem/gateway's admin interface, and look there for a firmware update.
Factory reset the device. Doing so removes all personalized settings, like if you changed the network name/password. To reset it to factory settings, look at the back of the modem and press the recessed "Reset" button for a few seconds.
Replace your equipment. Your router may be too old or internally damaged and replacing it might be your only option. Since it's a rental device, call Cox to get a replacement. If you don't want another rental, you can buy your own Cox-compatible modem and wireless router.
Call for a tech. In some cases, you can't fix the blinking green light yourself and need help from Cox. They should also check the coaxial lines to make sure there isn't any damage, but they can also replace any lines outside that have been compromised (think chew marks from outside critters).
Common Causes
There are a few reasons for a blinking green Cox modem, including: Loose cables Loose splitters Bent coaxial pins Damaged cables Outage Software glitch Outdated firmware Old equipment
FAQ
What color should my Cox modem be? Your Cox modem should show a white light if everything is functioning normally. If you see any other color, like green, yellow, orange, or red, you need to troubleshoot it.
Why is my modem blinking green? A blinking green light on "Upstream" means the modem is looking for a channel. You can fix this a few different ways, like checking for loose or damaged coaxial or power cables, restarting the modem, and updating firmware.
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