I recently completed a new build with the AMD Ryzen 7 2700X and an Asus ROG Strix X470-F motherboard. The newly built system won't POST!! I talked to Asus customer service and they told me the problem was with the BIOS and they sent me to AMD. Not sure why I should be talking to AMD but here I am. How can I update my BIOS when my build won't post???
Possibly you need a boot kit, does the mobo box have a Ryzen 2000 sticker.
Did Asus mention that.
https://www.amd.com/en/support/kb/faq/pa-100