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And then safely reset the CMOS by removing the CMOS battery for 5 minutes.

If you don’t see a password there, you can just fill up the EEPROM with “0” zero, or FF. Next, using your other computer, reprogram your EEPROM by backing up your EEPROM and run cmospwd / d / l eeprom_backup. To reprogram your EEPROM, you will need to desolder the EEPROM with a hot air desolder or can try to clip the EEPROM with some wires to plug it in the EEPROM reader. You can easily find an EEPROM programmer in an electronic shop or lab, and you will need another computer to use it. So, for his reason, you might need an EEPROM programmer or EEPROM reader to retrieve the password. So, if you remove the CMOS battery, and if the password is stored on the EEPROM, you won’t be able to boot your Lenovo laptop anymore.

One another problem with laptops is that the BIOS password is often stored in an EEPROM on the Laptop’s motherboard rather than storing it on the CMOS.