HP Compaq Presario C700 CTO, Compaq Presario C700LA, Compaq Presario C700T CTO, Compaq Presario C700XX, Compaq Presario C701LA User Guide

Power Management

User Guide

© Copyright 2007 Hewlett-Packard
Development Company, L.P.

Windows is a U.S. registered trademark of
Microsoft Corporation.

The information contained herein is subject
to change without notice. The only
warranties for HP products and services are
set forth in the express warranty statements
accompanying such products and services.
Nothing herein should be construed as
constituting an additional warranty. HP shall
not be liable for technical or editorial errors
or omissions contained herein.

First Edition: July 2007

Document Part Number: 446624-001

Product notice

This user guide describes features that are common to most models. Some features may not be
available on your computer.

iii

iv Product notice

Table of contents

1 Power control and light locations

2 Setting power options

Using power-saving states ................................................................................................................... 3

Initiating and exiting Sleep ................................................................................................... 3

Initiating and exiting Hibernation .......................................................................................... 4

Using the battery meter ........................................................................................................................ 5

Using power plans ................................................................................................................................ 6

Viewing the current power plan ........................................................................................... 6

Selecting a different power plan .......................................................................................... 6

Customizing power plans ..................................................................................................... 6

Setting password protection on wakeup ............................................................................................... 7

3 Using battery power

Finding battery information in Help and Support .................................................................................. 9

Displaying the remaining battery charge ............................................................................................ 10

Inserting or removing the battery ........................................................................................................ 11

Charging a battery .............................................................................................................................. 12

Managing low battery levels ............................................................................................................... 13

Identifying low battery levels .............................................................................................. 13

Resolving a low battery level ............................................................................................. 14

Calibrating a battery ........................................................................................................................... 15

Step 1: Fully charge the battery ........................................................................................ 15

Step 2: Disable Hibernation and Sleep .............................................................................. 15

Step 3: Discharge the battery ............................................................................................ 16

Step 4: Fully recharge the battery ...................................................................................... 17

Step 5: Reenable Hibernation and Sleep .......................................................................... 17

Conserving battery power .................................................................................................................. 18

Storing a battery ................................................................................................................................. 19

Disposing of a used battery ................................................................................................................ 20

Resolving a low battery level when external power is available ........................ 14

Resolving a low battery level when a charged battery is available ................... 14

Resolving a low battery level when no power source is available ..................... 14

Resolving a low battery level when the computer cannot exit Hibernation ....... 14

4 Using external AC power

Connecting the AC adapter ................................................................................................................ 22

v

5 Shutting down the computer

Index ................................................................................................................................................................... 24

vi

1 Power control and light locations

The following illustration and table identify and describe the power control and light locations.

Component Description

(1) Internal display switch Turns off the display if the display is closed while the computer is

on.

(2) Power button

When the computer is off, press the power button to turn on

●

the computer.

When the computer is on, press the power button to shut down

●

the computer.

When the computer is in the Sleep state, press the power

●

button briefly to exit Sleep.

When the computer is in Hibernation, press the power button

●

briefly to exit Hibernation.

If the computer has stopped responding and Windows® shutdown
procedures are ineffective, press and hold the power button for at
least 5 seconds to turn off the computer.

To learn more about your power settings, select Start > Control
Panel > System and Maintenance > Power Options.

1

Component Description

(3) Power lights* (2)

(4) fn+f5 Initiates Hibernation.

(5) Battery light

*The 2 power lights display the same information. The light on the power button is visible only when the computer is open. The
light on the front of the computer is visible whether the computer is open or closed.

On: The computer is on.

●

Blinking: The computer is in the Sleep state.

●

Off: The computer is off or in Hibernation.

●

On: A battery is charging.

●

Blinking: A battery that is the only available power source has

●

reached a low battery level. When the battery reaches a
critical battery level, the battery light begins blinking rapidly.

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 level.

2 Chapter 1 Power control and light locations

2 Setting power options

Using power-saving states

The computer has two power-saving states enabled at the factory: Sleep and Hibernation.

When Sleep is initiated, the power lights blink and the screen clears. Your work is saved to memory,
letting you exit Sleep faster than exiting Hibernation. If the computer is in the Sleep state for an extended
period or if the battery reaches a critical battery level while in the Sleep state, the computer initiates
Hibernation.

When Hibernation is initiated, your work is saved to a hibernation file on the hard drive and the computer
turns off.

CAUTION: To prevent possible audio and video degradation, loss of audio or video playback

functionality, or loss of information, do not initiate Sleep or Hibernation while reading from or writing to
a disc or an external media card.

NOTE: You cannot initiate any type of networking connection or perform any computer functions while

the computer is in the Sleep state or in Hibernation.

Initiating and exiting Sleep

The system is set at the factory to initiate Sleep after 10 minutes of inactivity when running on battery
power and 25 minutes of inactivity when running on external power.

Power settings and timeouts can be changed using Power Options in Windows® Control Panel.

With the computer on, you can initiate Sleep in any of the following ways:

Close the display.

●

Click Start, and then click the Power button.

●

Click Start, click the arrow next to the Lock button, and then click Sleep.

●

You can exit Sleep in any of the following ways:

Press the power button.

●

If the display is closed, open the display.

●

Press a key on the keyboard or button on the remote control (select models only).

●

Activate the TouchPad.

●

When the computer exits Sleep, the power lights turn on and your work returns to the screen where you
stopped working.

Using power-saving states 3

NOTE: If you have set a password to be required on wakeup, you must enter your Windows password

before your work will return to the screen.

Initiating and exiting Hibernation

The system is set at the factory to initiate Hibernation after 120 minutes of inactivity when running on
battery power, 1080 minutes (18 hours) of inactivity when running on external power, or when the battery
reaches a critical battery level.

Power settings and timeouts can be changed using Power Options in Windows Control Panel.

To initiate Hibernation:

Press fn+f5.

▲

– or –

Click Start, click the arrow next to the Lock button, and then click Hibernate.

To exit Hibernation:

Press the power button.

▲

The power lights turn on and your work returns to the screen where you stopped working.

NOTE: If you have set a password to be required on wakeup, you must enter your Windows password

before your work will return to the screen.

4 Chapter 2 Setting power options