On Sun, 26 Jun 2022 18:32:26 -0700
Alexander Shenkin [off-list ref] wrote:

Ok all.  I've put in the new mobo + CPU, and the BIOS isn't finding any 
bootable devices.  Suggestions for next steps?  Thanks in advance...

As mentioned before, did you find and enable CSM and "Boot mode: UEFI and
Legacy" in BIOS?

If you have trouble finding any of that, perhaps post the motherboard model,
we could check the exact settings to look for.

-- 
With respect,
Roman