Lenovo Thinkpad L570, Hardware Maintenance Manual

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1. Turn off the computer and disconnect the ac power adapter.
2. Remove the battery pack. For how to remove the battery pack, see “1010 Battery pack” on page 72.
3. Remove the coin-cell battery. For how to remove the coin-cell battery, see “1080 Coin-cell battery”
on page 79.
4. Connect the ac power adapter. 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 coin-cell battery and the battery pack.
(B) If a 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.
3. Type the supervisor password to enter the ThinkPad Setup program.
4. Select Security , using the cursor keys to move down the menu.
5. Select Password .
6. Select Power-On Password .
7. Type the current supervisor password in the Enter Current Password field. Then leave the Enter
New Password field blank, and press Enter twice.
8. In the Changes have been saved window, press Enter.
9. Press F10 to save changes and exit the ThinkPad Setup program.
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 password, or to recover data from the hard disk drive. To put the
system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to
replace the hard disk drive or solid-state drive with 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.
3. Select Security , using the cursor keys to move down 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 to save changes and exit the ThinkPad Setup program. The user hard disk password and the
master hard disk password have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep,
and hibernation.
Screen blank mode (for the Windows 7 operating system only)
If the time set on the “Turn off monitor” timer in the operating system expires, the LCD backlight turns off.
Chapter 4
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Related service information
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