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SB8200 was in service since August 2024 and under warranty.

In December 2024, “No Internet” status from all home computers.

All status lights (Power, Receive, Send, Internet) solid green, none flashing

Computer directly connected to the modem also reports “No Internet”.

Xfinity reports modem is fully addressable from their end (but lights never flash)

Approximately 3 hours Xfinity phone support and over a dozen modem/router reboots performed

IPCONFIG /RELEASE, IPCONFIG /RENEW performed, PING local network addresses successful, PING internet unsuccessful

Need process to return modem under warranty

You’d need to go through support. 

https://arris.my.salesforce-sites.com/consumers/ConsumerProductSupport?t=Call&utm_source=SURFboardSite&utm_medium=contact-us&utm_campaign=surfboard-resources-call

 

One thing to keep in mind  is that even though the SB8200 has 2x ethernet ports, xfinity only supports 1 device connected to it. So if you have more than 1, try disconnecting everything from the modem, factory reset it , then power it off for arouond 10-15 minutes. Once that time has passed, power it on with nothing connected to it. give it a couple minutes. Then plug your router (just the router) into it. run through the setup process on the router. 

what router do you have? 

 


The Router is a Cisco/Linksys EA9200. I have since had Arris technical support perform numerous tests and have me returning it for a replacement. Thank You. 


Glad they were able to get you setup with a replacement!