Dell Inspiron 3910 BIOS Password Removal - Service Tag: CBJDWV3

[5518]

Hello, I need help removing the BIOS supervisor password from a Dell Inspiron 3910.
I have attached my 100% clean and verified original backup (checked with HxD, Flash Descriptor signature

Code:

5A A5 F0 0F

is present at offset 10).
I already tried using the automated 8FC8 script, but it triggers a Boot Guard error (3 amber, 6 white blinks). The BIOS region seems locked ("stores not found" in UEFITool NE). Could someone please patch my original dump properly or clear the NVRAM while keeping the Boot Guard signatures intact?
Thank you in advance!