Lenovo ThinkPad T420si Hardware Maintenance Manual - Page 56

How to remove the hard disk password, Power management, Screen blank mode, Security, Password

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3. Remove the backup battery. For how to remove the backup battery, see "1090 Backup battery" on page 83. 4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does not appear. The power-on password has been removed. 5. Reinstall the backup battery and the battery pack. (B) If an supervisor password 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 ThinkPad Setup. When power-on password icon is appearing on the screen, enter the power-on password. 3. Select Security, using the cursor directional keys to move the menu. 4. Select Password. 5. Select Power-On Password. 6. Type the current supervisor password 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 hard disk password 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 hard disk passwords or to recover data from the hard disk drive. The hard disk drive can be replaced for a scheduled fee. To remove a user hard disk password that has been forgotten, when the supervisor password and the master hard disk password are known, do the following: 1. Turn on the computer. 2. When the ThinkPad logo comes up, immediately press F1 to enter ThinkPad Setup. When power-on password icon is appearing on the screen, enter the power-on password. 3. Select Security, using the cursor directional keys to move the menu. 4. Select Password. 5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens. 6. Select Master hard disk password. 7. Type the current master hard disk password in the Enter Current Password field. then leave the Enter New Password field blank, and press Enter twice. 8. Press F10. 9. Select Yes in the Setup Configuration window. Both user hard disk password and master hard disk password will have been removed. Power management To reduce power consumption, the computer has three power management modes: screen blank, sleep (standby in Windows XP), and hibernation. Screen blank mode If the time set on the "Turn off monitor" timer in the operating system expires, the LCD backlight turns off. To put the computer into screen blank mode, do as follows: 50 Hardware Maintenance Manual

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3. Remove the backup battery. For how to remove the backup battery, see “1090 Backup battery” on
page 83.
4. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does
not appear. The power-on password has been removed.
5. Reinstall the backup battery and the battery pack.
(B) If an supervisor password 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 ThinkPad Setup. When power-on
password icon is appearing on the screen, enter the power-on password.
3. Select
Security
, using the cursor directional keys to move the menu.
4. Select
Password
.
5. Select Power-On Password.
6. Type the current supervisor password 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 hard disk password 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 hard disk passwords or to recover data from the hard disk drive. The
hard disk drive can be replaced for a scheduled fee.
To remove a user hard disk password that has been forgotten, when the supervisor password and the master
hard disk password are known, do the following:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter ThinkPad Setup. When power-on
password icon is appearing on the screen, enter the power-on password.
3. Select
Security
, using the cursor directional keys to move the menu.
4. Select
Password
.
5. Select
Hard-disk
x
password
, where
x
is the letter of the hard disk drive. A pop-up window opens.
6. Select
Master hard disk password
.
7. Type the current master hard disk password in the
Enter Current Password
field. then leave the
Enter
New Password
field blank, and press Enter twice.
8. Press F10.
9. Select
Yes
in the Setup Configuration window. Both user hard disk password and master hard disk
password will have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep
(standby in Windows XP), and hibernation.
Screen blank mode
If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off.
To put the computer into screen blank mode, do as follows:
50
Hardware Maintenance Manual