Are you using WIFI. have you tried hard wiring just to check. Think you have to switch off WIFI for cat 5 to work.
Silly thought. Your not using 1 connection on both box's are you,
I have tried everything with WiFi, cable, HDMI etc. every time a black screen on that one box. I have a subscription with 2 connections from my provider. I read here that more and more people suffer from a black screen but that they (Support) say it every time that it is up to the provider. I have 2 Z8 and one works fine and the other is not, with the same provider. so it must be at the box/mol2. I am now going to try tivimate.