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CM600 Please check RF connection
Hi,
I have a CM600 that suddenly stopped working. When i log into the modem it says “your modem is offline please check the RF connection”. I called xfinity and they said everything is good on their end but can’t connect to the modem. In settings, one channel is locked. Does anyone have any ideas on how to troubleshoot this? Attached is the event log.
I have a CM600 that suddenly stopped working. When i log into the modem it says “your modem is offline please check the RF connection”. I called xfinity and they said everything is good on their end but can’t connect to the modem. In settings, one channel is locked. Does anyone have any ideas on how to troubleshoot this? Attached is the event log.
- It turns out my neighbors dog bite my line… xfinity was able to run a new line and everything is fix now. Thanks for the help!
8 Replies
- Hmm I can’t post a .jpeg so I’ll type it.
Time not established critical 3 - No UCDs received -timeout
Time not established critical 3 - sync timing synchronization failure- failed to acquire Qam/qpsk
Time not established critical 3 sync failure failed to acquire fec framing- Channel 1 locked, modulation QAM256, Chanel Id 12, frequency 495000000hz, power -25.5dBmv, SNR 26.8 dB, correctable 36203440, incorrectables 1838213. Everything else is not locked.
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-routerYou correct and un-correctables should be zero.
https://www.duckware.com/tech/solving-intermittent-cable-modem-issues.html
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 to check all fittings as well.
Be sure your using good quality RG6 coax cable up to the modem.
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#M12853Check power levels:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311
