Does anyone know to to reset an HP 4120 that is locked?

To reset any of the following IP phones: Aastra 6721, Aastra/Mitel 6725, HP 4110, HP 4120, Polycom CX500, Polycom CX600, or Polycom CX3000 conference phone - do the following:

1) Remove the power cord from the device, and wait 10 seconds.

2) Press one of the following reset key combinations (differences are explained in final step), and continue to hold down the keys while the power is reconnected and the device starts up:
For a Hard Reset, press * and #. A hard reset deletes all customer data on the device.
For a Factory Reset, press 4 and 6. A factory reset deletes all customer data and restores the previous valid image.

Will that work even if the default password was changed?