Dell Inspiron 7586 2-in-1: Bypass Security Check

Hi All,

I tried to flash mod BIOS to my Dell Inspiron 7586 2-in-1 with a CH341A programmer to unlock advanced bios menu.

  IMG_4929.jpg (Size: 347.06 KB / Downloads: 2)

However, any modification to the BIOS region will make my laptop not POST.   It seems that Dell has a built-in security check to
prevent users from using mod BIOS, which I don't know how to bypass it.  
Could any experts on this forum teach me how to bypass this security check?


Here is my BIOS file with Flash Descriptor modified.

  inspiron7586_fd_patched.rom.zip (Size: 7.72 MB / Downloads: 1)


Thank you.
-Steven