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CM1200 cable modem requires frequent power cycling. Downstream light flashes frequently.
have a CM1200 cable modem that requires frequent power cycling because the downstream light starts flashing after a few days of use. I usually have to power cycle two to three times per week. My ISP, RCN, also known as Astound has checked everything and the signal(s) from them are in good order. I have had them to the house several times to evaluate this but to no avail. Most of what my wife and I do is not that demanding. My wife works from home three days per week, ten hours per day. I work three hours per day uploading medical data to my company. We do some streaming but no more than three hours per day average. The ISP says the problem is with the cable modem and the last tech I spoke with stated that it was probably a cache issue. Research on the internet points a finger at the ISP.
Any thoughts or ideas appreciated. The modem firmware is the latest from Netgear.
Thank you in advance.
1 Reply
What Firmware version is currently loaded?
Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-router
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-modem-routerBe sure your using a good quality LAN cable between the modem and router. CAT6 is recommended.
What is the brand and model of the host wifi router connected to the modem?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
