Wyse 3040 BIOS Issue. Ignore the topic, this is the most fitting.

I've downgraded my thin client to the BIOS 1.2.2 version for legacy ROM. However, it still isn't present. I did disable secure boot btw. Anyways does it retain UEFI Class 3 after downgrading? Because I am not techy enough to mess with chain loading in GRUB2.