Power Management Features - HP Presario 5800 Series Maintenance & Service Manual

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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.
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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:
Energy State
On
Off
Soft Off
Sleep
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Maintenance & Service Guide
Presario 5800 Series Personal Computers
Home | Preface
Power Management States
Description
Power is available to the system. The
AC cable is connected, and the power
status light is green.
Power is not available to the system
and the AC cable is disconnected. The
power status light is not lit.
Power is available to the system, the
AC cable is connected, and the power
LED is off.
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.
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Power Consumption
90 Watts avg., 110 Watts max
0 Watts
1-2 Watts
27 Watts
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