Area-51m R2, BIOS won't load after secure boot change, beep code 3 2 1

Hi,

No BIOS booting.

Beep code is 3, 2, 1.

Alienhead lights amber 3 times.

I was testing on my laptop Ventoy to boot several OSes; it wasn't booting and was showing an error, then I got into BIOS and was working with the Expert Key Management. From what I've read, modifying some of these parameters could brick the device, which actually happened.

Is there a way (using a programmer) to overwrite the firmware into the chip?

I will disassemble the whole laptop and boot it without the GPU attached, hoping it'll boot into BIOS, so I can restore the settings (if possible).

Maybe getting a new motherboard instead would be the only way for me to fix this problem?

Any suggestion or input is greatly appreciated.