If the jumper method does not work, you can try a full power drain: M720q User Guide and Hardware Maintenance Manual
Prompts immediately when you turn on the PC. lenovo thinkcentre m720q bios password reset
Find the JP35 jumper block on the motherboard. On the If the jumper method does not work, you
Let it beep for 15–30 seconds, then hold the power button for 5 seconds to force it off. lenovo thinkcentre m720q bios password reset
Disconnect the power again and move the jumper back to its original position.
, this is typically located in the top-left corner near the Wi-Fi antenna or rear ports.
Remove the screw on the back of the case and slide the cover off.