The most effective way to clear a forgotten BIOS password on the
Erasing lost or forgotten passwords (clearing CMOS) - Lenovo lenovo thinkcentre m720q bios password reset
Alternatively, many technicians use the "Southbridge short": Find two tiny resistors labeled R484 and R485 near the CMOS battery connector. Short those two resistors together with tweezers while powering on. The most effective way to clear a forgotten
: Reassemble the case and reconnect the power. Turn on the system and repeatedly tap to enter the Lenovo BIOS Setup ; the password prompt should no longer appear. Important Safety and Configuration Notes Data Preservation lenovo thinkcentre m720q bios password reset
Pulling the button cell battery off the motherboard for a few seconds will not clear the password on this model.