To reset the BIOS password on a Lenovo ThinkCentre M720q , the most effective hardware method involves using the Clear CMOS/Recovery jumper
Q: I tried the jumper short method, and now my M720q won't boot at all. A: You likely shorted the wrong pins and corrupted the EC firmware. You now need an SPI programmer (CH341A) to reflash the EC. Search for "M720q IT8528 dump file" online. lenovo thinkcentre m720q bios password reset
4.1. Automated Challenge Extraction