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Dynamic Range Window violation errors are usually due to an intermittent connection causing problems in the upstream power levels. 47 dBmV on the upstream is OK, but 53 is borderline/too high.
To troubleshoot this yourself see Connection Troubleshooting Tips.
If you can't find the problem or you'd rather have Comcast do the troubleshooting, call them at the phone number on your bill or 1-800-Comcast, or chat with them using the Internet Support option at https://support.xfinity.com/chat. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it.
If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast originally supplied them) you'll probably have to pay for the visit unless you have their Service Protection Plan (https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it).
Hi Gbarnes. I am so glad to see you were able to resolve your issue. If you need assistance with anything further. Please let us know, we are happy to help.