I can no longer boot Headless with X9SCA-F after updating the BIOS to 2.0x from BIOS 1.0x while JPG1 is set to 2-3 (Disabled Onboard VGA), JPB1 is set to 1-2 (Enabled IPMI) and no other graphics adapter installed.
Please change the following BIOS Settings:
Wait for F1 on error to Disabled
Console Redirection (SOL) to Disabled
Now you are able to boot Headless again.