Brinks alarm box keeps beeping
We bought a home that has a Brinks alarm box that was supposedly disconnected. After living here for over a year, it is now beeping at random. We have pushed every button on there, nothing makes it stop.
Online research finds someone else posted this question 4 years ago. The solution that helped them was disconnecting a black box located somewhere in the basement. Unfortunately, we have no basement here, and if there's a black box somewhere, I can't find it.
The box is mounted on the kitchen wall backing up to the garage, but there's no black box behind or near it or anywhere else in the garage. The only place it could be located is up in the attic, which has no crawl space near the wall-mounted Brinks box. Any suggestions are appreciated. Thanks.