Model C7000v2

[TSDE74]

My Nighthawk AC1900 WiFi modem router online is blinking green:  the modem router is synchronizing with the cable providers’ cable modem termination system.  My internet stopped working and Mediacom says that my modem/router is offline.  Please tell me what is wrong.  Do I need a new modem/router?

[FURRYe38]

Please post a copy and paste of the modems connection status and event log page.
https://kb.netgear.com/30007/How-do-I-obtain-the-cable-connection-information-from-a-NETGEAR-cable-m...
https://kb.netgear.com/30008/How-do-I-view-or-clear-the-event-logs-on-my-NETGEAR-cable-modem-or-mode...

Be sure to power OFF the modem for 1 minute then back ON.