It's the Management Engine Firmware that is corrupted for whatever reason.
The board might be defective or the Intel Management Engine of the chipset could be defective.
Or it might just be the board BIOS that's corrupted.
The only possible option to end users is trying to re-cover the motherboard BIOS.. unfortunately the procedure is automatic to end user now (old Gigabyte motherboards some years ago had manual end-user access thru a boot-block that allowed to manually recover from the backup BIOS)... as described here:
http://www.gigabyte.com/MicroSite/55/tech_081226_dualbios.htmOf course Gigabyte knows some workarounds and developers/debugging access to the board to force diagnostics and DualBIOS recovery but as far as I know none of that info has been made public on the 'net for current motherboards and I doubt they are willing to reveal anything like that.
So if the DualBIOS recovery procedure just won't start automatically then RMA is the only option.