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cs1234's avatar
cs1234
Aspirant
Jun 13, 2023

CM2000 modem boot loop(?) after a year of working

DOCSIS 3.1 Cable Modem (CM2000)    Purchased the Nighthawk cm2000 last year, warranty just ran out... I can't get any help on the customer support section, the link to purchase additional support d...
FURRYe38's avatar
FURRYe38
Guru - Experienced User
Jun 13, 2023

Power OFF the CM modem and disconnect all from the modem. Re-connect one ethernet connected PC to the modem. 

Disconnect the ISP Coax cable from the modem.

Power ON the modem give 15 seconds then press the reset button in back for 10 seconds then release. 
Does this change the behavior? 

If it stops the boot loop, connect up the ISP coax line to the back of the modem to see if the modem will completely come to ready. Check internet services with the one ethernet connected PC.

  • cs1234's avatar
    cs1234
    Aspirant
    Jun 13, 2023

    This doesn't appear to change the behavior at all. I've already tried resetting so I expected this, but the device doesn't seem to respond to the reset button at all and continues rebooting indefinitely.

     

    I've tried various combinations of factory resetting, letting it sit unpowered for extended periods of time, plugging it into a machine without the coax, and of course with the coax.

     

    The lines are fine since my other modem works fine in its place, but obviously I'd rather keep using my multi gig modem rather than a 300mbit one