Flashing the BIOS to Fix a "Bricked" Lenovo Laptop - Parts Not Included
How to update the Machine Type and Model (MTM), System Serial Number (SN), or System Brand ID of system BIOS menu – ThinkCentre, ThinkStation - Lenovo Support FI
Download lenovo BIOS/UEFI drivers for lenovo M900 Desktop (ThinkCentre)