HP dv8000, Pavilion dv8300, Pavilion dv8400 User Manual
Power
Document Part Number: 393525-002
December 2005
This guide explains how the computer uses power.
Contents
1 Power controls and lights
2 Power sources
Connecting the AC adapter . . . . . . . . . . . . . . . . . . . . . . . 2–2
3 Standby and hibernation
Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Hibernation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Initiating standby, hibernation or shutdown. . . . . . . . . . . 3–3
When you leave your work . . . . . . . . . . . . . . . . . . . . 3–3
When a reliable power supply is unavailable . . . . . . 3–4
When using wireless communication or readable or
writable media (select models only) . . . . . . . . . . . . . 3–5
4 Default power settings
Turning the computer or display on or off . . . . . . . . . . . . 4–2
Using emergency shutdown procedures. . . . . . . . . . . . . . 4–3
Initiating or resuming from standby. . . . . . . . . . . . . . . . . 4–4
Initiating or restoring from hibernation . . . . . . . . . . . . . . 4–5
5 Power options
Accessing Power Options Properties . . . . . . . . . . . . . . . . 5–1
Displaying the Power Meter icon. . . . . . . . . . . . . . . . . . . 5–2
Setting or changing a power scheme . . . . . . . . . . . . . . . . 5–3
Setting a security prompt . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
Power ii
6 Processor performance controls
7 Battery packs
Inserting or removing a battery pack . . . . . . . . . . . . . . . . 7–2
Charging a battery pack . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Monitoring the battery pack charge . . . . . . . . . . . . . . . . . 7–5
Obtaining accurate charge information . . . . . . . . . . . 7–5
Displaying charge information on the screen . . . . . . 7–6
Managing low-battery conditions . . . . . . . . . . . . . . . . . . 7–6
Identifying low-battery conditions . . . . . . . . . . . . . . 7–7
Resolving low-battery conditions . . . . . . . . . . . . . . . 7–8
Calibrating a battery pack . . . . . . . . . . . . . . . . . . . . . . . . 7–9
When to calibrate. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–9
How to calibrate. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–10
Conserving battery power . . . . . . . . . . . . . . . . . . . . . . . 7–13
Conserving power as you work . . . . . . . . . . . . . . . . 7–13
Selecting power conservation settings. . . . . . . . . . . 7–14
Storing a battery pack. . . . . . . . . . . . . . . . . . . . . . . . . . . 7–14
Disposing of a used battery pack . . . . . . . . . . . . . . . . . . 7–14
Contents
Index
Power iii
Power controls and lights
The following illustration and table identify and describe the
power control and light locations.
1
Component Description
1 Display switch Initiates standby if the display is closed
2 Power lights* (2) On: The computer is on.
Power 1–1
when the computer is on.
Blinking: The computer is in standby.
Off: The computer is off or in
hibernation.
(Continued)
Power controls and lights
Component Description
Power button When the computer is
3
■ Off, press to turn on the computer.
■ On, press to enter hibernation.
■ In standby, briefly press to exit
standby.
■ In hibernation, briefly press to exit
hibernation.
If the computer has stopped
responding and Microsoft® Windows®
shutdown procedures cannot be used,
press and hold the power button for at
least 5
computer.
fn+f5 Initiates standby.
4
seconds to turn off the
5 Battery light On: A battery pack is charging or is
close to full charge capacity.
Off: If the computer is plugged into an
external power source, the light is
turned off when all batteries in the
computer are fully charged. If the
computer is not plugged into an
external power source, the light stays
off until the battery reaches a
low-battery condition.
Blinking: A battery pack that is the only
available power source has reached a
low-battery condition. When the
battery reaches a critical low-battery
condition, the battery light begins
blinking quickly.
*There are 2 power lights, which display the same information. The light on
the power button is visible only when the computer is open. The other power
light is always visible even when the computer is closed.
1–2 Power
Power sources
The computer can run on internal or external AC power.
following table indicates the best power source for
The
common
Task Recommended Power Source
tasks.
2
Work in most software
applications
Charge or calibrate a battery
pack in the computer
Install or modify system
software or write to a CD
DVD
or
■ Charged battery pack in the computer
■ External power supplied through one of the
following devices:
❐ AC adapter
❐ Optional docking device
❐ Optional power adapter
External power supplied through
■ AC adapter
■ Optional docking device
■ Optional power adapter
External power supplied through
■ AC adapter
■ Optional docking device
■ Optional power adapter
Power 2–1
Power sources
Connecting the AC adapter
WARNING: To reduce the risk of electric shock or damage to the
Å
equipment:
■ Plug the power cord into an AC outlet that is easily accessible at
times.
all
■ Disconnect power from the computer by unplugging the power
from the AC outlet (not by unplugging the power cord from
cord
computer.)
the
■ If provided with a 3-pin attachment plug on the power cord, plug
the cord into a grounded (earthed) 3-pin outlet. Do not disable the
power cord grounding pin; for example, by attaching a 2-pin
adapter. The grounding pin is an important safety feature. It is
possible to receive an electric shock from a system that is not
properly grounded.
To connect the computer to external AC power:
1. Plug the AC adapter into the power connector 1 on rear panel
of the computer.
2. Plug the power cord into the AC adapter 2.
3. Plug the other end of the power cord into an AC outlet 3.
2–2 Power
Standby and hibernation
Standby and hibernation are energy-saving features that conserve
power and reduce startup time. They can be initiated by you or by
the system. For more information, refer to “
hibernation or shutdown.”
Standby
CAUTION: To avoid a complete battery discharge, do not leave the
Ä
computer in standby for extended periods. Connect the computer to an
external power source.
3
Initiating standby,
Ä
Standby reduces power to system components that are not in use.
When standby is initiated, your work is stored in random access
memory (RAM), and then the screen is cleared. When the
computer is in standby, the power lights blink. When you resume
from standby, your work returns to the screen where you left off.
CAUTION: To reduce the risk of information loss, save your information
before initiating standby.
Power 3–1
Standby and hibernation
Hibernation
CAUTION: If the configuration of the computer is changed during
Ä
hibernation, resuming from hibernation may not be possible. When
computer is in hibernation:
the
■ Do not dock the computer in or undock the computer from a
docking device.
■ Do not add or remove memory modules.
■ Do not insert or remove hard drives or optical drives.
■ Do not connect or disconnect external devices.
■ Do not insert or remove an external media card such as a Digital
Media Slot card, a PC Card, or an ExpressCard.
Hibernation saves your work to a hibernation file on the hard
drive, and then shuts down the computer. The power lights are
turned off. When you restore from hibernation, your work returns
to the screen where you left off. If a power-on password has been
set, the password must be entered to restore from hibernation.
Ä
CAUTION: To reduce the risk of information loss, save your information
before initiating hibernation.
You can disable hibernation. However, if hibernation is disabled
and the system reaches a low-battery condition, the system will
not automatically save your work when power is on or when
standby has been initiated.
Use Power Options in Microsoft® Windows® Control Panel to
reenable hibernation:
» Select Start > Control Panel > Performance and
Maintenance > Power Options > Hibernate tab. Make
that the Enable hibernation check box is selected.
sure
To set the time interval after which the system initiates
hibernation:
1. Select Start > Control Panel > Performance and
Maintenance > Power Options.
2. Click one of the intervals in the System hibernates list.
3–2 Power
Standby and hibernation
Initiating standby, hibernation or
shutdown
The following sections explain when to initiate standby or
hibernation and when to shut down the computer.
You cannot initiate any type of networking communications
✎
When you leave your work
perform any computer functions when the computer is in
or
standby or hibernation.
When standby is initiated, your work is stored in random access
memory (RAM), and then the screen is cleared. When the
computer is in standby, it uses less power than when it is on. Your
work returns instantly to the screen when you resume from
standby.
Hibernation saves your work to a hibernation file on the hard
drive, and then shuts down the computer. When the computer is
hibernation, it uses much less power than when it is in standby.
in
When the computer will be unused and disconnected from
external power for an extended period, shut down the computer
and remove the battery pack to extend the life of the battery
pack. For details on battery pack storage, refer to “
battery pack.”
Storing a
Power 3–3
Standby and hibernation
When a reliable power supply is
unavailable
Make sure that hibernation remains enabled, especially if you are
operating the computer on battery power and do not have access
to an external power supply. If the battery pack fails, hibernation
saves your work to a hibernation file and shuts down the
computer.
If you pause your work when the power supply is uncertain, you
take one of the following actions:
■ Save your work, and then initiate standby.
■ Initiate hibernation.
■ Shut down the computer.
3–4 Power
Standby and hibernation
When using wireless communication
readable or writable media
or
(select
CAUTION: To prevent possible audio and video degradation, or loss
Ä
of audio or video playback functionality, do not initiate standby or
hibernation when reading or writing to a CD, DVD, or external media
card. To prevent loss of information, do not initiate standby or
hibernation when writing to a CD or DVD.
Standby and hibernation interfere with the use of infrared and
Bluetooth communication, and media. Note the following
guidelines.
■ If the computer is in standby or hibernation, you cannot
■ If standby or hibernation is accidentally initiated during
models only)
initiate an infrared or Bluetooth transmission.
playback of a medium such as a CD, DVD, or external
media
❏ Your playback may be interrupted.
❏ You may see the following warning message: “Putting the
card:
computer into hibernation or standby may stop the
playback. Do you want to continue?” Click No.
❏ You may need to restart the CD or DVD to resume audio
and video playback.
Power 3–5
Standby and hibernation
3–6 Power
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