Thanks.
Had a 4 year system going and this happened.
Bout a new system, it worked for a week, then the same thing happened.
Bought a new surge protector for the main router point thinking possibly stray voltage did some damage .
I will try what you suggested
Surge protector doesn’t really do much against modern power grid issues. Might want to get an AVR or UPS for each node if power issues are a problem in your area - but that said, it’s most likely an interference/range issue.