My CM3000 stopped working.

I have a CM3000 cable modem, purchased Sep 11, 2024. Yesterday it stopped working. The second light down from the top (lightning) is the only one that is active, sometimes blinking, sometimes solid.

I called my internet provider Xfinity. They went through the diagnostic tests on their side and determined that everything on their side was working properly. They sent multiple system resets, and the CM3000 did acknowledge via the lights changing when the reset was sent as the light indicators changed from the bottom up for about a second. And then the second indicator down (lighting) either blinked slowly or stayed solid.

I have a previous cable modem from Arris, an SB8200, that I had upgraded from to the CM3000. While still on the phone with Xfinity technical support, I disconnected the CM3000 and connected up the Arris SB8200. After Xfinity provisioned the SB8200, sent a reset, I was up and running.

Prior to swapping over to the Arris cable modem, I had disconnected power to the CM3000 several times.

LED light status:
only lightning blinks slowly, and sometimes is solid

What are the troubleshooting steps that you have done so far?
I called my internet provider Xfinity. They went through the diagnostic tests on their side and determined that everything on their side was working properly. They sent multiple system rests, and the CM3000 did acknowledge via the lights changing when the rest was sent from the bottom up for a second. And then the second indicator down (lighting) either blinked slowly or stayed solid.

I have a previous cable modem from Arris, an SB8200, that I have upgraded from to the CM3000. While still on the phone with Xfinity technical support, I disconnected the CM3000 and connected up the Arris SB8200. After Xfinity provisioned the SB8200, sent a reset, I was up and running.

Internet Service Provider:
Xfinity

Firmware Version of the cable modem:

Hardware Versions
1.01

Cable Firmware Version
V6.01.03

CM Certificate
Installed

Forum Discussion

CM3000 stopped working