I'm technical but not an expert in this stuff. The Zinwell has 4 inputs and 8 outputs. 1. Can someone please briefly explain what the inputs and outputs are? For example, do you need all the inputs to get all the channels? 2. I'm trying to tackle my long suffering 771 issue. In terms of diagnosing the issue it's interesting that I lose the signal only in my living room, not any of the bedrooms. Even if I swap receivers it's always the living room. This suggests to me that it's related only to the cables serving the living room. Would that be a fair assumption? If so what next steps would you suggest to diagnose where the issue lies. A big thank you for any feedback. I appreciate it.