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Forum Discussion
Nighthawl C50V Downstream light blinking on Generator Power
Hello, I recently had a power outage. I have a UPC that I run my PC, Router, and Wifi Mesh on. In the past, I've had no issues with the internet running while the whole house generator is on. Today the lights went out and as the generator was running the Nighthawk C2050v downstream light kept blinking and the modem kept restarting. See the event log attached. Not sure what this is? The ISP reported the modem as being offline. Mabe needs to power amplify the cable signal in from ISP? I unplugged from the UPS and had the same issue.
6 Replies
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. Indicates a signal issue on the ISP line up to the modem.
- Cable ConnectionCancel Apply
Frequency start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency Startup Procedure Procedure Status Comment Acquire Downstream Channel 579000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 Locked QAM256 32 579000000 Hz 5.2 dBmV 43.3 dB 0 0 2 Locked QAM256 17 489000000 Hz 5.8 dBmV 43.9 dB 0 0 3 Locked QAM256 18 495000000 Hz 5.5 dBmV 43.8 dB 0 0 4 Locked QAM256 19 501000000 Hz 5.4 dBmV 43.8 dB 0 0 5 Locked QAM256 20 507000000 Hz 5.5 dBmV 43.8 dB 0 0 6 Locked QAM256 21 513000000 Hz 5.6 dBmV 43.8 dB 0 0 7 Locked QAM256 22 519000000 Hz 5.6 dBmV 43.8 dB 0 0 8 Locked QAM256 23 525000000 Hz 5.2 dBmV 43.6 dB 0 0 9 Locked QAM256 24 531000000 Hz 5.0 dBmV 43.5 dB 0 0 10 Locked QAM256 25 537000000 Hz 4.9 dBmV 43.6 dB 0 0 11 Locked QAM256 26 543000000 Hz 5.1 dBmV 43.6 dB 0 0 12 Locked QAM256 27 549000000 Hz 5.3 dBmV 43.7 dB 0 0 13 Locked QAM256 28 555000000 Hz 5.3 dBmV 43.6 dB 0 0 14 Locked QAM256 29 561000000 Hz 5.0 dBmV 43.5 dB 0 0 15 Locked QAM256 30 567000000 Hz 4.9 dBmV 43.4 dB 0 0 16 Locked QAM256 31 573000000 Hz 5.0 dBmV 43.4 dB 0 0 17 Locked QAM256 33 585000000 Hz 5.4 dBmV 43.4 dB 0 0 18 Locked QAM256 34 591000000 Hz 5.5 dBmV 43.5 dB 0 0 19 Locked QAM256 35 597000000 Hz 5.4 dBmV 43.4 dB 0 0 20 Locked QAM256 36 603000000 Hz 5.0 dBmV 43.2 dB 0 0 21 Locked QAM256 37 609000000 Hz 5.0 dBmV 43.3 dB 0 0 22 Locked QAM256 38 615000000 Hz 5.2 dBmV 43.2 dB 0 0 23 Locked QAM256 39 621000000 Hz 5.6 dBmV 43.3 dB 0 0 24 Locked QAM256 40 627000000 Hz 5.6 dBmV 43.2 dB 0 0 25 Locked QAM256 41 633000000 Hz 5.4 dBmV 43.2 dB 0 0 26 Locked QAM256 42 639000000 Hz 5.0 dBmV 43.1 dB 0 0 27 Locked QAM256 43 645000000 Hz 5.2 dBmV 43.2 dB 0 0 28 Locked QAM256 44 651000000 Hz 5.4 dBmV 43.2 dB 0 0 29 Locked QAM256 45 657000000 Hz 5.8 dBmV 43.3 dB 0 0 30 Locked QAM256 46 663000000 Hz 5.7 dBmV 43.2 dB 0 0 31 Locked QAM256 47 669000000 Hz 5.4 dBmV 43.2 dB 0 0 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 2560 10400000 Hz 41.3 dBmV 2 Locked ATDMA 2 5120 16400000 Hz 42.0 dBmV 3 Locked ATDMA 3 5120 22800000 Hz 42.5 dBmV 4 Locked ATDMA 4 5120 29200000 Hz 43.0 dBmV 5 Locked ATDMA 5 5120 35600000 Hz 43.3 dBmV 6 Locked ATDMA 11 2560 40400000 Hz 43.0 dBmV 7 Not Locked Unknown 0 0 0 Hz 0.0 dBmV 8 Not Locked Unknown 0 0 0 Hz 0.0 dBmV Downstream OFDM Channels Channel Lock Status Profile ID Channel ID Frequency Power SNR / MER Active Subcarrier
Number RangeUnerrored
CodewordsCorrectable
CodewordsUncorrectable
Codewords1 Locked 0 ,1 ,2 ,3 48 722000000 Hz 6.3 dBmV 42.7 dB 928 ~ 3167 224664690 216978459 0 2 Not Locked 0 0 0 Hz 0 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0 dBmV 2 Not Locked 0 0 0 Hz 0 dBmV Current System Time:Mon Jul 08 17:20:35 2024 System Up Time:01:48:40 Power Levels and Correctables and Un-correctables are good.
I'd check the modem plugged into a non generator power source to check for differences in LED behaviors. There could be some on power differences happening on the generator vs a wall jack power source.
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/
