Community Forum

Sudden weak signal - Lost internet connection and channels

Xfinity Forum Archive
About the archive project

Xfinity Forum Archive...

This is an archived section of the community.

Content in this area has been identified as outdated or irrelevant.

This change was done in an effort to make the forum easier to use and to keep only the most helpful and recent content active.

Post your questions in the Xfinity Community

New Poster

Sudden weak signal - Lost internet connection and channels

I have been a Comcast customer for almost 10 years in my house with no issue.  Since yesterday, I suddenly lost connection to the internet and have no signal to few HD channels on the TV.


Cable modem (SB6121) have green downstream light and upstream is flashing, without internet conncetivity.  It has been showing blue light (good) forever.  


Chatted with the customer support, they just had me restart and powecycle my equipments repreatedly for hours (which I done even before contacting them).  The rep seems to be more interested in upselling my package than fixing my problem.


Tech is coming tomorrow.  Is there anything I can point to the tech, so we are not wasting our times?  Anything tht he should look for (e.g. sudden change in my neighborhood infrastructure maybe)?