After a power failure my Orbi router has appeared back as the default network name? How can I join it?
___________

Sounds like somehow the Orbi reset if you are seeing the default network name in your list of available networks. If that is the case, you should be able to look on the bottom or back of either of the routers and it will list the network name AND password. Usually orbi default passwords are two words and a number like luckyorange24 or something similar.