At long last a BIOS has surfaced that will let me use my R5 2400G on my rather expensive MSI X570-A Pro motherboard.
When I bought the motherboard the literature said my CPU would work. Sure sure, tell that to the judge. The red LED said no.
Full detailed instructions to get a R2 2200G or R5 2400G working on a MSI X570 motherboard on on my site.