Check if the power brick to the unit is working. My neighbor and I had this same issue right after a power outage. The surge when the power returned killed the transformer. There is an LED on the brick (actually a POE injector). If this has gone out, you’re running on battery - hence the beep.
Thanks to everyone - (except the ‘Tucker Carlson’ comment and ones similar).
We’ve tried everything, saw the video suggested, etc. Nothing is working. Doesn’t fix if we leave the battery in or out, press the ‘silence’ button, nothing.
No, we have not called Verizon. There should be a way to fix something oneself, when you don’t even need this back-up thingie to start with.
Thanks again.