Ok so I finally figured out my problem with this build. You are correct, the Mobo and processors are compatible out of the box. The problem with this build is the RAM frequency. I tried the same combo with a Ryzen 3 2200G and it also didn't post. When I switched out the 2800 MHz ram with 2x 2400 MHz Ballistic sticks, it posted! Check out this page for more info re: processor and RAM frequency compatibility. https://www.asrock.com/MB/AMD/B450M-HDV%20R4.0/index.asp#Specification. it's more specific to the Ryzen series processors but it may help others in troubleshooting. Thanks and good luck!
See description for BIOS v. 2.20 and up.
I bought these components and it won't post. Although it could also be the RAM frequency. I used 2800 and will be trying 2400 shortly w/ a Ryzen 2200GE.
This build won't work out of the box. Mobo BIOS needs to be updated in order to support 200GE, which requires the Mobo to be updated before delivery, or you need to use a temporary older processor to boot into the BIOS for a flash update, then swap out to the 200GE. RAM frequency might also be an issue...2400 may be a safer bet.
Did you run into issues getting this build to post? I tried the same Mobo and CPU, but it doesn't post. Did you have to update bios or CPU drivers?