Netgear CM600 Requiring Frequent Reboot

Several months ago I had some type of electrical issue (lightening, power surge, whatever).  I lost internet accesss.  With the help of the Geek Squad it was pretty much determined that my Netgear router (AC1750) was the culprit.  I replaced it with the same router and internet access was restored.  However, over time I experienced connectivity issues - couldn't printer to our wireless printer, couldn't get to websites, "not connected to the internet" issues, etc.  I would reset/reboot the modem and router and everything went back to working.  There are times that I'm doing this every .week.

Because I purchased this equipment my ISP (Sparklight) isn't really able to help me troubleshoot the issue and suggested I get ahold of Netgear.  My modem's firmware seems to be up-to-date (V1.01.21).  The event log on the modem has multiple entries that seem to indicate problems.  They include such things as "DHCP RENEW WARNING" . . ., "Started Unicast Maintenance Ranging", "MDD message timeout",  "TLV-11 - unrecognized OID" and "Missing BP Configuration Setting TLV Type". 

The "easy" answer is to just buy a new modem, but I'd like to not spend money unless it's really necessary.