@googlenesthelp No, it's a solid white light. No "none" english characters in name or password. It's been sorted now, factory reset solved the problem. Thanks for the help.
@googlenesthelp No, fiber my fiber is fine. Tested with another router. I have 3 Google wifi, all connected with ethernet cat6 cable through an 8port unmanaged switch, it's been working perfectly for a few years. Currently factory resetting them.