Supervisor Password; How To Remove The Power-On Password; How To Remove The Hard-Disk Password - Lenovo THINKPAD L420 Hardware Maintenance Manual

Attention: If the user HDP has been forgotten, check whether a master HDP has been set. If it has, it can be
used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor Lenovo authorized
service technicians provide any services to reset either the user or the master HDP, or to recover data from
the hard disk drive. The hard disk drive can be replaced for a scheduled fee.
For how to remove the POP, see "How to remove the hard-disk password" on page 39.

Supervisor password

A supervisor password (SVP) protects the system information stored in the BIOS Setup Utility. The user must
enter the SVP in order to get access to the BIOS Setup Utility and change the system configuration.
Attention: If the SVP has been forgotten and cannot be made available to the service technician, there is no
service procedure to reset the password. The system board must be replaced for a scheduled fee.

How to remove the power-on password

To remove a POP that you have forgotten, do the following:
(A) If no SVP has been set:
1. Turn off the computer.
2. Remove the battery pack. For how to remove the battery pack, see "1010 Battery pack" on page 57.
3. Remove the backup battery. For how to remove the backup battery, see "1140 Backup battery" on
page 80.
4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does
not appear. The POP has been removed.
5. Reinstall the backup battery and the battery pack.
(B) If an SVP has been set and is known by the service technician:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter BIOS Setup Utility. For models
supporting the Passphrase function, press F1 while the POP icon is appearing on the screen; then enter
the POP. For the other models, enter the POP.
Note: To check whether the ThinkPad Notebook you are servicing supports the Passphrase function,
enter the BIOS Setup Utility and go to Security ➙ Password. If the Using Passphrase item is displayed
in the menu, this function is available on the ThinkPad Notebook.
3. Select Security, using the cursor directional keys to move down the menu.
4. Select Password.
5. Select Power-On Password.
6. Type the current SVP in the Enter Current Password field. then leave the Enter New Password field
blank, and press Enter twice.
7. In the Changes have been saved window, press Enter.
8. Press F10; then, in the Setup Confirmation window, select Yes.

How to remove the hard-disk password

Attention: If User only mode is selected and the user HDP has been forgotten and cannot be made
available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide any
services to reset the user HDPs or to recover data from the hard disk drive. The hard disk drive can be
replaced for a scheduled fee.
.
Chapter 4 Related service information
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