Hello and thank you for your contact.
UEFI recovery procedure for Esprimo Q520:
1. Set the dip switch from DEFAULT to UEFI recovery position (see attached picture for both positions: q520-dipswitch.JPG)
2. Download the BIOS admin package for your Mainboard:
D3223-A1x - Admin package - Compressed Flash Files V4.6.5.4 - R1.47.0 (26/08/2019):
https://support.ts.fujitsu.com/IndexDow ... E48CA5316A3. Create a bootable FreeDOS USB Flash Drive. Please select the following link to make your USB stick bootable with Free DOS.
http://support.ts.fujitsu.com/Download/ ... 0&Info=FTS4. Extract all files of the downloaded BIOS Admin package to a bootable FreeDOS. Unzip it the Admin package into the folder "DOS" and the file ".rom" on a bootable USB stick (see attached picture: q520-extract.JPG).
5. Boot from USB bootstick.
6. Type the command "dosflash.bat"
7. You will be asked, if you want to continue flash update. Press "Y" for yes.
8. When the recovery is finished, switch off the system, put the dip switch in its default position and reboot the system.
Best regards,
Forum Support team