I have a E3C226D2I motherboard that was on BIOS version 2.00. In the process of trying to eradicate some issues, I updated the BIOS to the latest (v3.30). The update went fine, but now the system won't boot from any bootable USB flash drive, which is critical for its operation. 
All I get is a black screen with a flashing cursor. I've tried bootable drives made in a variety of manners, including a Yumi-made drive as well as a pure FreeDOS drive. I've tried resetting the BIOS settings and re-doing them from scratch, forcing all USB ports to "Legacy", disabling UEFI and USB3, and also tried just using the drives in USB2-only ports. Nothing works, and I know these flash drives are bootable and in fact one was booting the computer prior to the BIOS update. And of course, I can't downgrade the BIOS version. Any thoughts as to what I'm missing? My server is now totally down until I can fix this. Thanks
All I get is a black screen with a flashing cursor. I've tried bootable drives made in a variety of manners, including a Yumi-made drive as well as a pure FreeDOS drive. I've tried resetting the BIOS settings and re-doing them from scratch, forcing all USB ports to "Legacy", disabling UEFI and USB3, and also tried just using the drives in USB2-only ports. Nothing works, and I know these flash drives are bootable and in fact one was booting the computer prior to the BIOS update. And of course, I can't downgrade the BIOS version. Any thoughts as to what I'm missing? My server is now totally down until I can fix this. Thanks
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