What the light means:
Sounds like it needs a factory reset using the physical button.
If that does not help it might be dead.
Actually, I finally figured out that the issue was a bad Google Nest. Once I replaced that Nest (that was the main distributor) and did a factory reset the system worked again. BTW, everything I've learned about computers took 1 or 2 hours. To check the modem I realized that I could plug the ethernet cable directly into my laptop. Since it worked, I knew the problem was in the mesh system. Thanks for the reply!