Hi all I was hoping for some guidance as I'm preparing for the AM2. I've seen comments online saying a question came up in the AM2S that I'm struggling to find an answer for. When using a tester on data cable what is the cause of a light showing on the master unit but then it's missing on the remote? As I understood it if there is an open circuit on a conductor then lights would be missing on both units. I've not seen or heard of just one missing before. Any help would be appreciated, cheers