Bios Mods -The Best BIOS Update and Modification Source

Hi, I'm trying to unlock the bios of my ideacentre. It is a pretty new board from lenovo, don't know if it is rebranded.
The bios is an Aptio V, tried AMIBCP with no luck (reports that the rebuild is unsigned, so cannot be flashed).
From OS the nvram is locked too.
Trying to figure out how to unlock it I dump all the efi variables from efishell, if there is some of theme that can do the trick.
I attach the dump and link to the bios file.

Thanks in advance if someone can help me.

http://support.lenovo.com/es/es/products...s/DS113047

[attachment=11335]

I managed to bypass security check swapping a setup section from a modded one to the original (UEFITool). The thing is that when trying to flash it says "Unknown ROM ID". Maybe in a dead end.
Since there is no capsule, or it's not obvious I can't do anything more by myself.

Anyone?