Power Management; Screen Blank Mode; Standby Mode - Lenovo 418734U - IdeaPad S9e 4187 Hardware Maintenance Manual

Power management

To reduce power consumption, the computer has three power management modes:
screen blank, standby, and hibernation.

Screen blank mode

To enter screen blank mode, press Fn + F2. To end screen blank mode and resume
normal operation, press Fn + F2.
In certain circumstances, the computer goes into screen blank mode automatically:
v If the time set on the "Turn off monitor" timer in the operating system expires,
To end screen blank mode and resume normal operation, press any key.

Standby mode

When the computer enters standby mode, the following events occur in addition to
what occurs in screen blank mode:
v The LCD is powered off.
v The hard disk drive is powered off.
v The CPU stops.
To enter standby mode, press Fn+F1.
Note: If you are using the ACPI operating system, you can change the action of
Fn+F1.
In certain circumstances, the computer goes into standby mode automatically:
v If a "suspend time" has been set on the timer, and the user does not do any
v If the battery indicator blinks orange, indicating that the battery power is low.
Note for the APM operating system: 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. This default low-battery behavior is
independent of the operating system; so if you have set the low-battery alarm, the
computer may not do what you specified. It chooses either your setting or the
default setting, whichever is appropriate.
If you are using the ACPI operating system, only the low-battery alarm is
available.
To cause the computer to return from standby mode and resume operation, do one
of the following:
v Press the Fn key.
v Open the LCD cover.
v Turn on the power switch.
the LCD backlight turns off.
operation with the keyboard, the touch panel, the hard disk, the parallel
connector, or the optical drive within that time.
(Alternatively, if Hibernate when battery becomes low has been selected in the
"Power Management Properties" window, the computer goes into hibernation
mode.)
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