Qflash plus can update a BIOS even when a PC can't boot
If your PC won't boot or you can't update the BIOS on your PC through other methods, you can try using the Q-Flash Plus feature on your Gigabyte motherboard. This feature is included on some newer and more high spec Gigabyte motherboards.
Firstly, you should create your flash USB drive. Choose a low capacity USB drive (32GB or less) and insert it into your PCs USB 3.0 port. Right click the drive in file manager and choose 'Format' from the menu. Ensure you choose the file system type of FAT-32. You can check the 'Quick format' box to save time and leave the other settings as standard.
Once the drive is formatted, copy your new BIOS file to the drive and rename it as GIGABYTE.bin noting the use of capital letters and small letters.
Now insert the USB drive into the white USB port at the rear of the target PC. With the PC switched off but with power to the power supply of the PC and the power supply turned on at the rear, you should now press the 'Q-Flash Plus' button on your PC motherboard. Sometimes this is on the rear IO plate and sometimes it is inside the PC on the main motherboard.
The Q-Flash plus LED will flash to show the process has begun. The PC must not be touched while the flash process is activated. Once complete, the PC will reboot and you can remove the USB from the rear.