Ebay. Haven't got a link, but as I recall it wasn't hard to find by
searching nest hello. It wasn't an instruction video on how to fix it,
just how to take it apart and what's inside it.
I managed to get a replacement battery for mine from ebay, and yes the
wired door bell has a battery, its fine since I replaced it. It's
disappointing that google/nest don't offer a refurbishment option seeing
as it looks like a common issue. There's...
You'll have to re link it with your Google account to get the chime to
work if I remember rightly, if you're using a Google home/mini as the
chime like me.
I have exactly the same problem. I think the 24v AC internal power
system is goosed on mine, like yours it powers up on USB. I tested the
transformer and it's working fine, so I bought a new nest wired doorbell
and it works fine.
