Nighthawk CM2000 upstream and downstream lights blink at random times

Question

I was wondering if anyone can help me decipher these logs. The blinking lights and connection issues started recently, Same products and set up were fine for years. I do have a few splitters since it is a 1960's house so I am thinking it might be a Coax issue but was hoping for some initial decoding of the logs to help me navigate.

Thank you in advance!!!!

FURRYe38 · Answer

What Firmware version is currently loaded?Please post a copy and paste of the modems connection status page.https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-modem-modem-routerAny Criticals, Errors or Warnings seen in the event logs needs to be reviewed and resolved by the ISP.&nbsp;Indicates a signal issue on the ISP line up to the modem.&nbsp;https://highspeed.tips/docsis-events/
Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended.&nbsp;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.&nbsp;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.&nbsp;Be sure your using good quality RG6 coax cable up to the modem.&nbsp;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#M12853https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-routerhttps://www.duckware.com/tech/solving-intermittent-cable-modem-issues.htmlhttps://highspeed.tips/docsis-events/

FURRYe38 · Answer

Power levels are too low and below spec and need to be raised:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router
&nbsp;
You have correctables and un-correctables that should be Zero.
&nbsp;
Have the ISP check the signal and line quality UP to the modem.&nbsp;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.&nbsp;Be sure your using good quality RG6 coax cable up to the modem.&nbsp;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#M12853https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.htmlhttps://highspeed.tips/docsis-events/

scottchtape · Answer

Thank you!&nbsp;&nbsp;Hardware Version1.01&nbsp;Cable Firmware VersionV8.01.02&nbsp;Currently the Router I am using is the Nighthawk XR1000&nbsp;When I did go to the Cable Connection log it was showing Status poor which I will paste here but definitely going to start going through the action list as quick as I can. I don't have any splitters but there are some female to female extenders on the way (possibly 2) so not sure if that can cause issues.&nbsp;&nbsp;

Forum Discussion

Nighthawk CM2000 upstream and downstream lights blink at random times

3 Replies

Hardware Version	1.01

Cable Firmware Version	V8.01.02