Lenovo ThinkPad L15 Gen 4

[Sbaro]

Ok guys I just manage to unlock it. It was pretty easy when you know what to do. For those who might need it, here is the unlocked EC file for a Model : ThinkPad L15 Gen4, Type Number : 21H8-S17L00

What worked for me was to put 00 instead of these lines in the EC file :

Thanks for all the information available in this forum !