Lenovo 33472YU, S230U manual Power management, Sleep mode, Hibernation mode, Select Master HDP

5.Select Hard-diskx 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 hard-disk password in the Enter Current Password field. Then leave the Enter New Password field blank, and press Enter twice.

8.Press Fn+F10 to save changes and exit the ThinkPad Setup program.

9.Select Yes in the Setup Notice window. Both the user hard-disk password and master hard-disk password will be removed.

Power management

There are several power-saving modes, such as sleep mode, hibernation mode, and wireless off mode. These power-saving modes enable the users to conserve power at any time.

Sleep mode

When the computer enters sleep mode, the following events occur:

•The LCD is powered off.

•The hard disk drive is powered off.

•The microprocessor stops.

In certain circumstances, the computer goes into sleep mode automatically:

•After a period of inactivity specified in power plan settings

•When the battery indicator blinks orange, indicating that the battery power is low

To return from sleep mode, do one of the following:

•Press the Fn key.

•Open the LCD cover.

•Press the power button.

Also, in either of the following events, the computer automatically returns from sleep mode and resumes operation:

•The ring indicator (RI) is signaled by a serial device or a PC Card device.

•The time set on the resume timer elapses.

Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few seconds before taking any action to reenter operation mode.

Hibernation mode

In hibernation mode, the following events occur:

•The system status, RAM, VRAM, and setup data are stored on the hard disk.

•The system is powered off.

If you have defined one of the following actions as the event that causes the system to go into hibernation mode, perform that action.

•Closing the lid.

•Pressing the power button.

Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power plan settings.

Chapter 4. Related service information 35