ASUS BIOS Flashback Issues

Badger · April 5, 2020

I cannot get the BIOS Flashback to work at all on my ASUS Maximus XI Hero motherboard. I recently updated my BIOS to version 1401. I've been having nothing but problems with this BIOS version tried reverting back to the factory default BIOS version and the previous one that I was on which was version 1302. When flashing back the light blinks 3 times, and stays lit and never turns off. I wait 2-3 minutes each time and in some cases 5 minutes. The light never goes off which it's suppose to do at least from what this guide that ASUS posted via here.

I've tried the following for both BIOS versions I'm trying to revert to:

Formatted USB to FAT16/FAT32
Used disk management on Windows and diskpart to clean and check for all partitions (none exist) and create a clean partition for FAT16/32
No other files but M11H.CAP
Used BIOSRenamer and tried running as admin
Used the USB BIOS Flashback port
Cleared all settings to default
Tried 3x USBs (USB 3.x, USB 2.0)
Cleared CMOS
Unplugged PSU power cable
Unplugged all other USB storage devices
Used EZ Flash Utility in the BIOS and get the message "Selected file not a proper BIOS!" for both BIOS versions as the original .CAP file downloaded from the driver/oem section as per my motherboard model.

I've tried everything I can think of. The main reason I'm trying to downgrade is because the slow POST/BIOS boot times I get and BIOS freezes that sporadically happen. This was the error message I got "GPT header corruption". Full picture of the error code is here. I've also saw a thread of others having the same problem here too. The only solution I found to boot is by setting my boot options to Auto Recovery. I still have problems with my BIOS randomly freezing at boot still but it has helped with being able to boot into my OS now.