Motherboards; Other vendor's motherboard/BIOS have offer a debug code read out function, through F12 functional key, for the pre-boot diagnostics.
Do Supermicro MBs have this debug-code read out function?
No, we don't have the F12 functional key for it. However, Super micro BIOS posting does preovide POST code at bottom right corner of the posting screen.
This post code is the debug code as those other vendors'.
You may download the "AMI BIOS POST Codes User's Guide" from manual download for continue pre-boot diagnostics/debug checks.
Download:
Scroll down page from below link to download "AMI BIOS POST Codes User's Guide" from selected MBs:
https://www.supermicro.com/support/manuals/?mlg=0
(Scroll down page/link above to locate AMI BIOS POST Codes User's Guide )