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Forum Discussion
CM1150V Downlink Light Flashing
My CM-1150V Cable Modem has in issue where the downlink light starts flashing, but everything is working correctly. The modem status shows no issues. When this happens, I've received two CM-STAT...
Has a power OFF of the modem for 1 minute then back on change the LED behavior?
Try a factory reset as well...
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.
Be sure to power OFF the modem for 1 minute them back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
FURRYe38 wrote:Has a power OFF of the modem for 1 minute then back on change the LED behavior?
Try a factory reset as well...
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.
Be sure to power OFF the modem for 1 minute them back ON.
Turning off the modem will clear the flashing downlink light. However, the downlink light will start flashing again in a day or two. :-(
I have a coax splitter between my TIVO box and CM1150V cable modem. I did try bypasing it and connect the coax cable directly to the CM1150V cable modem. Sadly, it did not solve the flashing problem. :-(
According to the CM1150V modem status, my downstream power for all the 32 channels are around +1dBmV and SNR around 37dB. The 4 upstream channels power are around 43dBmV. Both within the recommended DOCIS 3.1 modem specification.
I believe that it's a firmware issue since my internet connection (around the 900Mbps from speedtest.net) and phone line are fine.
Something to contact the ISP about as well. IF they claim the signal is good, then I would contact NG support. Would be nothing else that can be done here in the forums.
NG support doesn't monitor these forums? I would think that they (hopefully) have the technical expertise to answer my question.
No. Try a forum moderator: