I installed the operating system and adrenaline software from scratch, so that there were no unnecessary questions. Why are you kidding people? RX5700 continue to appear in the black screen in games and on the desktop !!!
I do know that AMD hasn't resolved the issues with hardware acceleration causing black screens. Do you have hardware acceleration enabled in any web browser such as Chrome or Edge? Also disable hardware acceleration in any game launchers such as Steam, Epic, Uplay or Discord.