Lenovo 2384EHU - ThinkPad G40 2384, Hardware Maintenance Manual

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Both user HDP and master HDP will have been
removed.
Power management
To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.
Screen blank mode
Screen blank mode has three variants, as follows:
1. If you are using the ACPI operating system and you
press Fn+F3,
v
The LCD backlight turns off.
v
The hard disk drive motor stops.
2. If the time set on the “Turn off monitor” timer in the
operating system expires,
v
The LCD backlight turns off.
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+F4.
Note: You can change the action of Fn+F4, if you are
using the ACPI operating system.
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 operation with the keyboard, the
TrackPoint, 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.)
Hibernation mode
In hibernation mode, the following occurs:
v
The system status, RAM, VRAM, and setup data are
stored on the hard disk.
v The system is powered off.
Related service information
General descriptions
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