[Request] Whitelist removal Lenovo ThinkPad T470s

[Master-DJ]

Hi, I have a ThinkPad T470S. I extracted the BIOS using a CH341, modified it with the available tools to remove the whitelist, and updated it again, but it won't boot. The screen stays black and there's a ringing sound (several beeps, like a song).
If I update the original BIOS, it boots correctly.
Can anyone help me or tell me what I'm doing wrong?
Thanks.

Original BIOS T470S