2017 Razer Blade Stealth 8550u serial number missing and Sku number

Hey guys,

Does anyone know how put the sku and serial number back into the bios. I got my laptop back from razer for a RMA repair and i wanted to update the bios but i keep getting "This firmware tool is for use only with Blade Stealth and compatible system. I have already tried using Amidewinx64 with the command terminal and i keep getting a d7 error when trying to enter my serial number or sku number. Pretty lost at this point.

thanks