United States December 16, 2002
Maintenance & Service Guide
Presario 5800 Series Personal Computers
MSG Index
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Product Description
Power Management Features
Compaq Presario 5800 Series Personal Computers use ACPI (Advanced Configuration and Power
Interface) for system power management. ACPI is an open industry specification that provides
reliable power management through improved hardware and operating system coordination.
The following is a list of the power management features:
●
Power Status Lights
. You can quickly tell the sleep condition of the system by glancing at
the Power Status Lights on the unit or keyboard.
●
Automatic Sleep
. In Windows 98, there are different Power Schemes under which the
system goes into Sleep mode automatically when it times out. The optional settings for
Windows 98 are
Home/Office Desk
,
Portable/Laptop
and
Always On
. The system
supports different levels of power management for varying patterns of computer usage.
●
Default and Adjustable timeout settings
. The default setting for Sleep timeout is 30
minutes. The Sleep timeout value can be set in the
Control Panel
by clicking the
Power
Management
icon. At the
Properties
screen, click
System Standby
,
Turn off Monitor
,
and
Turn off Hard Disk
to set the length of time before the system goes to sleep.
●
Manual Sleep
. To manually put your computer into sleep mode in the Windows 98 desktop,
press the
Sleep
button (on the keyboard). The power status light on the CPU will light to
show that Sleep mode is activated.
●
Other manual standby options
. Another way to put your computer into sleep mode
manually under Windows 98 is to select
Start
, then
Shutdown
. Select
Standby
from the list
of choices to put the system into Sleep mode. The system can then be turned off or left in
Sleep. When the Sleep button is pressed, the system returns to the previous Windows 98
Desktop state.
●
Wake up events
. Events that bring a system back to the working state include:
■
Pressing the Sleep button on the keyboard
■
Pressing the CPU Power button
■
Fax/Modem answers a call
●
Synchronized software and hardware volume control buttons
.
States of Power Management
Power management can be defined by three distinct power states in which the computer operates:
On, Off, and Sleep. The following table describes the power states and lists the power consumption
of each state:
Power Management States
Energy State
Description
Power Consumption
On
Power is available to the system. The
AC cable is connected, and the power
status light is green.
90 Watts avg., 110 Watts max
Off
Power is not available to the system
and the AC cable is disconnected. The
power status light is not lit.
0 Watts
Soft Off
Power is available to the system, the
AC cable is connected, and the power
LED is off.
1-2 Watts
Sleep
Power is available to the system, the
AC cable is connected, and the
computer is in a low power/standby
mode. The power status light is
amber.
27 Watts
