Can’t find HDMI/DisplayPort sound device in Radeon RX570 and ASRock B450M Pro4

Environment CPU:AMD Ryzen 5 2400G M/B:ASRock B450M Pro4 VGA:Radeon RX570 Issue I changed CPU and M/B and OS (Windows 10)was not clean installed. So I noticed  that my PC cannot sound through HDMI/DisplayPort. I thought old drivers are evil. So I used DDU because of removing old drivers. After removing them, I reinstall Radeon graphic driver. But my PC can’t recover. Solution A UEFI of a mother board(ASRock B450M Pro4)  is BAD. I install the newest UEFI to a mother board using UEFI menu(Instant Flash). ****warning**** If you update this mother board’ UEFI, you MUST go through a few steps. MUST READ YELLOW TEXT of this page *****************