This procedure, also known as the "Maintenance Mode" reset, bypasses the current password to allow access to the BIOS. M720q-Cmos-Maintenance-Jumper-Position - Lenovo Forums
When you trigger a "System Disabled" screen after three wrong password attempts, the screen displays a (a hash). lenovo thinkcentre m720q bios password reset
, you must use the physical located on the system board . Simply removing the CMOS battery is often insufficient for clearing supervisor or administrator passwords on modern ThinkCentre models. Resetting the BIOS Password via Jumper This procedure, also known as the "Maintenance Mode"
If you have forgotten either of these, the M720q is designed to be a brick until the correct credential is provided. Crucially, unlike older motherboards, modern Lenovo desktops store these passwords in non-volatile memory. This means that removing the CMOS battery (the coin cell) . The memory retains the data even without power. Simply removing the CMOS battery is often insufficient
: Typically in the upper-left corner if the rear ports are facing away from you. Position : The jumper is normally on pins 1 and 2 .
Wait approximately 10–30 seconds, then power the machine off by holding the power button.