Here's how to solve the PlayStation 4 Pro's flashing black screen 4K TV issue
LG OLED does not work with 4K and HDR (God of War) : r/PS4Pro
How to enable HDR on a LG television with the Sony Playstation 4 (PS4/PS4 Pro) | irx LLC - Business Consulting, Communications, and Information Technology
Fixed} : Your TV does not support HDR - How to enable HDMI 2.0 4K HDR for PS4 Pro - YouTube
IMPORTANT* Everyone should know that PS PRO has issues with LG 4K TVs and how to fix it. : r/PS4Pro