Chosen Solution
Black screen means generally two things, RAM or CPU issue, according to Asus specs which you can find it here, your MoBo is not compatible with Ryzen first-generation, also make sure that you haven’t installed the wrong BIOS on your MoBo, and the last thing to try is to use only one RAM instead of two or more, switch it between all the memory slots and don’t forget to clean the slots with a compressor air. Remove your graphic card while testing and don’t use it until your system works fine.
Few things to check: Make sure you are running Windows 10 version 1903, also known as the Windows 10 May 2019 Update. You can check this by typing winver in the start menu search bar and hit enter. If it is not on 1903 yet then do the windows update to get to that windows version.Ensure BIOS is up to date (This has already been done as you’ve said)Make sure you are using latest AMD chipset drivers. I think they are called AGESA and there have been quite a few hotfixes in terms of OS stability and drivers for that.Run the ram at non-overclocked / stock speeds (2133/2400 basically disabled ram profile). Sometimes ram overclocks can be unstable due to the motherboard / cpu combo not handling it well without finer tuning of the ram overclock.Use DDU (Display Driver Uninstaller) to clean uninstall your Nvidia and any other obsolete graphics drivers. You can download it here. After doing that make sure to install latest nvidia graphics driver.
