HP Dv8000 - 403809-001 Notebook Laptop Keyboard Bedienungsanleitung

Power

Document Part Number: 393525-002

December 2005

This guide explains how the computer uses power.

Power ii

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

Contents

Power iii

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

Index

Power 1–1

Power controls and lights

The following illustration and table identify and describe the

power control and light locations.

Component Description

1Display switch Initiates standby if the display is closed

when the computer is on.

2Power lights* (2) On: The computer is on.

Blinking: The computer is in standby.

Off: The computer is off or in

hibernation.

(Continued)

1–2 Power

Power controls and lights

3Power button When the computer is

■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 seconds to turn off the

computer.

4fn+f5 Initiates standby.

5Battery 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.

Component Description

Power 2–1

Power sources

The computer can run on internal or external AC power.

The following table indicates the best power source for

common tasks.

Task Recommended Power Source

Work in most software

applications

■Charged battery pack in the computer

■External power supplied through one of the

following devices:

❐AC adapter

❐Optional docking device

❐Optional power adapter

Charge or calibrate a battery

pack in the computer

External power supplied through

■AC adapter

■Optional docking device

■Optional power adapter

Install or modify system

software or write to a CD

or DVD

External power supplied through

■AC adapter

■Optional docking device

■Optional power adapter

2–2 Power

Power sources

Connecting the AC adapter

ÅWARNING: To reduce the risk of electric shock or damage to the

equipment:

■Plug the power cord into an AC outlet that is easily accessible at

all times.

■Disconnect power from the computer by unplugging the power

cord from the AC outlet (not by unplugging the power cord from

the computer.)

■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 1on 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.

Power 3–1

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 “Initiating standby,

hibernation or shutdown.”

Standby

ÄCAUTION: To avoid a complete battery discharge, do not leave the

computer in standby for extended periods. Connect the computer to an

external power source.

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.

ÄCAUTION: To reduce the risk of information loss, save your information

before initiating standby.

3–2 Power

Standby and hibernation

Hibernation

ÄCAUTION: If the configuration of the computer is changed during

hibernation, resuming from hibernation may not be possible. When

the computer is in hibernation:

■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.

ÄCAUTION: 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

sure that the Enable hibernation check box is selected.

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.

Standby and hibernation

Power 3–3

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

or perform any computer functions when the computer is in

standby or hibernation.

When you leave your work

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

in hibernation, it uses much less power than when it is in standby.

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 “Storing a

battery pack.”

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