Lenovo U510 - Manual (Page 29)

Related service information
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Note: Power management modes are not supported for APM operating system.
To reduce power consumption, the computer has three power management
modes: screen blank, sleep (standby), and hibernation.
Screen blank state
If the time set on the “Turn off monitor” timer in the operating system expires,
the LCD backlight turns off. You can also turn off the LCD backlight by pressing
.
To end screen blank state and resume normal operation, press .
Sleep (standby) state
When the computer enters sleep (standby) state, the following events occur in
addition to what occurs in screen blank state:
• The LCD is powered off.
• The hard disk drive is powered off.
• The CPU stops.
Putting your computer into sleep state
If you will be away from your computer for only a short time, put the computer
to sleep.
When the computer is in sleep mode, you can quickly wake it to resume use,
bypassing the startup process.
To put the computer to sleep, do one of the following:
• Close the display panel.
• Press the power button.
• Open the charms and then select Settings → Power → Sleep.
To wake the computer, do one of the following.
• Press the power button.
• Press any key on the keyboard.
Also, in the following event, the computer automatically returns from sleep
(standby) state and resumes the operation:
• The time set on the resume timer elapses.
Note: Wait until the power indicator light starts blinking (indicating that the
computer is in sleep mode) before you move your computer. Moving your
computer while the hard disk is spinning can damage the hard disk, causing loss
of data.
Power management