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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 put the computer into screen blank mode, press the Lenovo Care button and
use the ThinkVantage
®
Productivity Center.
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:
v The LCD is powered off.
v The hard disk drive is powered off.
v The CPU stops.
To
enter sleep (standby) mode, press Fn+F4.
In certain circumstances, the computer goes into sleep (standby) mode
automatically:
v 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.
v If the battery indicator blinks orange, indicating that the battery power is low.
(Alternatively, if Hibernate when battery becomes low has been selected in the
“Power Management Properties” window, the computer goes into hibernation
mode.)
To
cause the computer to return from sleep (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.
Also,
in the following event, the computer automatically returns from sleep
(standby) mode and resumes operation:
v The time set on the resume timer elapses.
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.
34 Lenovo 3000 N500 Hardware Maintenance Manual