Power Management; Sleep (Standby) Mode - Lenovo IdeaPad Z400 Touch Hardware Maintenance Manual

Power management

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 mode
If the time set on the "Turn off monitor" timer in the operating system expires,
the LCD backlight turns off.
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:
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To enter sleep (standby) mode, To put the computer to sleep, do one of the
following:
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In certain circumstances, the computer goes into sleep (standby) mode
automatically:
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To cause the computer to return from sleep (standby) mode and resume the
operation, do one of the following:
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Also, in the following event, the computer automatically returns from sleep
(standby) mode and resumes the operation:
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Note: The computer does not accept any input immediately after it enters
sleep (standby) mode. Wait a few seconds before taking any action to reenter
operation mode.
The LCD is powered off.
The hard disk drive is powered off.
The CPU stops.
Close the display panel.
Press the power button.
Open the Charms and then select
If a "suspend time" has been set on the timer, and the user does not do any
operation with the keyboard, the hard disk, the parallel connector, or the
diskette drive within that time.
If the battery indicator is amber, indicating that the battery power is low.
Press the Fn key.
Turn on the power switch.
The time set on the resume timer elapses.
Related service information
Settings → Power → Sleep.
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