Hello, try to follow the guide, you can share here the mod for verification.
MMtool method first, alternative the UEFI tool method…and don’t skip any part till the flash method.
EDIT: Every mod is a risk, what did you expected, as we even see once in a while some cases of official bios killing motherboards…
And probably, if a user offered you a ready-made mod, it could be just a mod and not a confirmed user of such mb model.