If you bought the integral from HDfury.com last 2 months and received it recently, use top input, hdcp slide on 1.4 and edid slide on automix.
If your unit is older, use bottom input, hdcp slide on 1.4 and edid slide on automix.
Connect K8500 > INTEGRAL > HDMI 3 or 4
If you haven't any picture after the above, move EDID slide to FIXED and report if you got a picture or not.
if still no picture on fixed, connect Integral to PC via USB and run GUI and take GUI screenshot please.
Already out for Android, in apple hands for iOS.
Automix will work like EDID10 if HDR FLAG is OFF and BT2020 FLAG is ON. (Assuming we always talk about same capable source at the input of course and that sink EDID doesn't have limiting or killing factor for the purpose like extra low res)
You need to add the Linker between Integral output and AVR input so it lower the secondary 4K signal (one going to your TV) to a res supported by your AVR.
In the meantime you can try Beta AVR with TV on bottom output and AVR on top output.
It's something Integral can more likely help once we have determined what's the issue is exactly
Try to connect cable box to TV directly and see in TV info or cable box setting/info menu if you can determine the output resolution.
May be it's sending 1080i and X1S doesn't support it.
What is your android phone brand/model ?