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Forum Discussion
CM1200 stopped working with xfinity
My modem was working fine, but it stopped working after I moved to a new apartment.
I tried contacting Xfinity support to activate it, but it is not working. I have tried restarting, resetting it, and getting a new coax cable, but it still failed.
When it gets started, the top 3 signals can be solid, but the 4th signal cannot turned into solid. The support team said that this modem can react to their remote control, but it just won't go online. The technician said there must be a problem with this modem and tried to convince me to buy/rent their modem.
However, I am not convinced why a move will change this modem from working to not working.
Please see the event log and other details attached.
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Info is showing no power or connection on the modem.
You can try the modem at a different location or try a different modem altogether to see if something else works on this same line you have. If something else doesn't means the ISP needs to send a tech out and check things for your.
Have them review all this:
Any Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP. Indicates a signal issue on the ISP line up to the modem.
Be sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Start with removing any amplifiers, signal attenuators, or splitters from the coax.
From there check the line for kinks, damage, moisture in the line.
Check the connectors for improperly made ends, foil touching the copper coax line, loose connections, bad/old/cheap connectors, or corroded connections. Replace them if you do.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
https://highspeed.tips/docsis-events/Was xfinity your ISP prior?
Yes, it was.
I have my old modem working (ARRIS SBG10). So probably it is a modem issue.
