So after having solved the hdcp issue between the C9 and the PS4 Pro (with a splitter, nothing else would work), I'm still having the following issues with the TV that are driving me nuts:
1. When I have the PC turned off and play PS4, for example, there is a constant popup message every ten seconds or so saying that the PC input wants to connect despite it being turned off. The only way right now to avoid this us to leave the PC turned on or disconnect it altogether. Both options are shit. Now I read on an official LG help page that this (or a similar sounding) problem can be solved by switching "listen mode" off in the screen share settings. Only problem: my screen share settings only show a "delete pairing history" option, nothing else. I also have all simplink, autodetect etc.-options turned off already.
2. Switching on devices or simply the light in the same room will cause the TV to show a black picture for a second.
Can any of you guys help me with these? This is such a good TV in theory but these technical problems have really soured my initial experience. :(