Doorbell AVD1001 can't be found by smart hub

[Yaoming]

The base is VMB4540r2.  I bought the doorbell two years ago, and initially it was working fine until one day it got disconnected from the base due to base firm ware update.

Since then I haven't been able to get it connected to the base. Can someone shed some light please?

I am about to return it to Costco. 

[jguerdat]

Did you remove the doorbell from your account before trying to connect it again? Masyb e a reset would help:

https://kb.arlo.com/000062346/How-do-I-reset-my-Arlo-Essential-Video-Doorbell

[Yaoming]

Yes I did. Currently the doorbell is not showing up in the device list.

[jguerdat]

Did you also reset it?

It's certainly possible that the doorbell has failed but that wouldn't seem likely here. Have you checked the voltage at the doorbell with a voltmeter?

[Yaoming]

I reset it before and it didn't work, but I'll try again.

The doorbell rings perfectly, doesn't seem there is voltage issue.

[Yaoming]

No. I tried resetting, now it doesn't even ring. The wiring works, because when I touch them, it rings.