Arlo Ultra worked well but went offline. Tried battery swap and reinstalled. SmartHub shows amber.

[Cowper96]

Purchased and installed at farm 20 kilometres Out of town, month ago. Three cameras working well until a week ago. One camera went offline. Battery swapped out but will not reconnect with hub.
Read online need to uninstall and then reinstall .
Second camera went offline at won’t reconnect.
Brought the whole system home and now hub is offline and will not reconnect with broadband internet.
Hub is Flashing amber. Trust to reset and sync cameras. Hub still flashing amber.

[jguerdat]

Define "reset". Properly done, you should remove all devices from Settings, My Devices. You may also want to hold the reset button until the LED flashes amber (>10 seconds). Let the hub reboot and claim it again normally. Sync the cameras.