Landroid WR165E Wire Missing

Out of a sudden my Landroid reported missing wire in app, without any change being performed on the wire. I've installed it 2 months ago. Suspect it's a cable being damaged (not sure how and why) Any idea about troubleshooting this?

Was thinking about the followings: 1. Replace existing wire with a very short one to make sure the docking station correctly reports wire status. 2. Check with a multimeter the connection on ends of existing cable. 3. If both above are indicating a wire damage, connect AC voltage on the existing cable and use a non contact voltage tester (have the tool already, but works only for AC, and suspect the Landroid uses DC on the perimetral wire), in order to find out where the wire is damaged.

Any thoughts?