The Specific Lenovo BIOS Key for Commonly Used Lenovo Models
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 GR
How to boot from USB disk in the BIOS (Boot Menu) - ideapad/Lenovo laptops - Lenovo Support US
Recommended ways to enter BIOS - ThinkPad, ThinkCentre, ThinkStation - Lenovo Support PH