This might be caused due to some driver conflicts give a try for the clean installation.
use DDU Utility (Display Driver Uninstaller) by launching it in Safe mode and uninstall the previous driver.
then restart your computer again and enter into the normal windows mode. And install all the critical and recommended updates from Windows. (make sure windows is not installing the display driver
Again, restart the computer and then install 19.4.1 drivers by clicking this below link. disconnect the network connection and disable antivirus before running the installer file. https://www.amd.com/en/support/graphics/radeon-500-series/radeon-rx-500-series/radeon-rx-580
You mentioned the sound cuts off – does your issue match this issue? If it does, that would be worrying, because it would suggest it can affect Intel CPUs as well.
Central topic for AMD random black screen/no signal issue, with power and reset buttons not working