Enter ROMMON
-- from shutdown status, power-on the device while continuously PRESSING the mode button.
Switch:
Switch: SWITCH_IGNORE_STARTUP_CFG=1
Switch: reset
Once the switch has booted
Switch# copy start runn
From here, set the NEW password(s).
Or write erase =) then use reload "reload" command
Finally, reverse the startup-boot switch to default
Switch# no system ignore startup-config switch all
Switch# copy runn start