Power Management; Screen Blank Mode; Sleep Mode; Hibernation Mode - Lenovo THINKPAD E30 Hardware Maintenance Manual

2. When the ThinkPad logo comes up, immediately press F1 to enter BIOS Setup Utility.For models
supporting the Passphrase function, press F1 while HDP icon is appearing on the screen; then enter the
master HDP. For the other models, enter the master HDP.
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 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 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,
and hibernation.

Screen blank mode

To put the computer into screen blank mode, do as follows:
1. Right-click the Power Manager Battery Gauge in the task bar.
2. Select Power off display.

Sleep mode

When the computer enters sleep mode, the following events occur in addition to what occurs in screen
blank mode:
• The LCD is powered off.
• The hard disk drive is powered off.
• The CPU stops.
To enter sleep mode, do as follows:
1. Click Start.
2. Click the triangle mark on the right side of the Shut down icon; then select Sleep.
To return from sleep mode, press the Fn key.

Hibernation mode

By using this mode, you can turn off your computer completely without saving files or exiting from any
applications that are running. When you enter hibernation, all open applications, folders, and files are saved
to the hard disk, and then the computer turns off.
To enter hibernation mode, do as follows:
1. Click Start.
2. Click the triangle mark on the right side of the Shut down icon; then select Hibernate.
To return from hibernation mode, press the power button for more than 4 seconds.
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Hardware Maintenance Manual