C3700v2 disconnecting intermittently every 30-45min and works after restart

[kvaidyan]

My modem today intermittently disconnecting from the ISP every 30-45 min. Happened close to a dozen times now. Works when I unplug cable and power and reconnect. Pretty painful considering a WFH situation.

When I call up Comcast, they say it's a modem issue as they can't connect to the modem when it's down. No Comcast outages and neighbors report they're connecting via Comcast as well. So seems isolated to my residence. When I call up Netgear, they say it's a Comcast issue as they believe there's nothing wrong with the modem when it is connected and works when reconnected.

Any sugestions to more permanently solve. 

[plemans]

If you have any splitters, amplifiers, or attenuators in your coax line, remove them.

Get a screen snip of your cable connections page and logs and post it here. 

You might need to get the isp to actually check the line but lets start with those details first. 

[kvaidyan]

thanks for offer to help. no splitters, amplifiers, or attenuators  coax line

attaching a screenshot.. I see during the day multiple times channels appear locked and power ranges seem off. Netgear thinks its a Comcast issue. Comcast thinks it's a Netgear modem issue