Here is a design specification for a hypothetical software feature to address this need.
You are looking for pins labeled "KBC" (Keyboard Controller) or "SDA/SCL" near the EC. Based on community schematics for the M720q (IBM Lenovo FRU: 5B20S43790 or similar), you need to short pin 8 (GND) to pin 1 (SDA) of the EC's debug header. lenovo thinkcentre m720q bios password reset
Many corporate refurbished units have standard passwords. Here is a design specification for a hypothetical
the CMOS battery and reassemble your computer. lenovo thinkcentre m720q bios password reset
It is typically located in the near the Wi-Fi antenna or rear ports.
If you encounter issues or the methods aren't working, professional assistance might be necessary.
Slide the computer cover toward the front or rear (after removing the single thumb screw at the back) to expose the motherboard.