Power Management; Screen Blank Mode; Sleep (Standby) Mode - Lenovo ThinkPad L412 Hardware Maintenance Manual

1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter BIOS Setup Utility. When the POP
icon is appearing on the screen, enter the POP.
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 HDP.
7. Type the current master HDP 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 HDP and master HDP 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:
1. Press Fn+F3. A panel for selecting a power plan (in Windows XP, power scheme) appears.
2. Select Power off display (keep current power plan) (in Windows XP, keep current power scheme).
You can also put the computer into screen blank mode, press ThinkVantage button and use the ThinkVantage
Productivity Center.
Note: If the computer is a Windows 7 model, it does not support ThinkVantage Productivity Center.
To end screen blank mode and resume normal operation, press any key.

Sleep (standby) mode

When the computer enters sleep (standby) mode, the following events occur in addition to what occurs
in screen blank mode:
• The LCD is powered off.
• The hard disk drive or the solid state drive is powered off.
• The CPU stops.
To enter sleep (standby) mode, press Fn+F4.
Note: You can change the action of the Fn+F4 key combination by changing the settings in Power Manager.
In certain circumstances, the computer goes into sleep (standby) mode automatically:
• If a "suspend time" has been set on the timer, and the user does not do any operation with the keyboard,
the TrackPoint, the hard disk, the parallel connector, or the diskette drive within that time.
• If the battery indicator blinks orange, indicating that the battery power is low.
Note: Even if you do not set the low-battery alarm, the charge indicator notifies you when the battery is low,
and then the computer enters the power-saving mode automatically.
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Hardware Maintenance Manual