I think you need to turn on the debug log and download it attached to a post. You could try it with the Hanspree TV first, then the Sony.
Just to be clear - when you tune to a satellite channel, you can see the screen (Vix) user interface displayed on the new Sony TV, but the box is reporting "tune failed" or similar? If you go into the setup menu on Vix and use the Signal Finder it will tell you if it can obtain a lock on any of the transponders.
If it's the case that the video to the TV drops out entirely when you select a satellite channel, then it's a resolution issue between the GB Trio (which is 4k capable) and the Sony. There may be an odd setting in the AV menu. Can you post a screenshot of the AV setup menu?
I re-read the thread and something is confusing me. You said you connected the sat cable directly to the TV and got no signal. The Sony W800 does not have a satellite tuner, only terrestrial DVB-T/T2.