Compaq XL240 Manuel

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PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES BATTERY AND POWER MANAGEMENT 1

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Battery and Power Management

This chapter describes power management and proper battery operating practices for Presario 1400

Series Notebooks. These practices include conservation of AC power and effective control of energy

to extend the operating life of the battery. The following Power Mode sections also outline the

correct methods of starting and shutting down the Notebook in various situations.

Power Modes

Presario 1400 Series Notebooks have three levels of low power: Hibernation, Standby, and Full Off.

Hibernation

Hibernation mode helps conserve battery life and protect data. The Notebook automatically enters

Hibernation when the battery has little power left, or when the Notebook (operating on battery

power) is in Standby mode for more than one hour. As the Notebook enters Hibernation, it

automatically stores the contents of its memory to the hard drive before shutdown. When the

Notebook wakes from Hibernation, it returns to its former state.

Note: When the Notebook enters or wakes from Hibernation mode, a Progress window is

displayed.

To activate Hibernation mode, press the Power Ÿbutton once.

To resume from Hibernation mode, press the Power Ÿbutton once.

Standby

Standby is a low-power mode, also referred to as Sleep mode. The Notebook maintains system

information and open files while in Standby mode. Selecting Standby instead of turning off the

Notebook when your have finished working has two advantages: 1. It allows the Notebook to wake

up faster than it would if it had been turned off; 2. It saves more power than the Active-On mode.

ÄÄ

ÄCAUTION: Unsaved information is lost if the Notebook is turned off prior to

system wake-up, or if a power loss occurs while using the AC adapter.

To activate Standby/Sleep mode, press Fn+F4 or click Start. Select the Shut Down option, and

then Standby.

To resume from Stand/Sleep mode, press any key.

2 BATTERY AND POWER MANAGEMENT PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Full Off

Full Off mode consumes no power. The battery charges continuously if the battery is installed while

the Notebook is in Full Off mode and if the Notebook remains plugged into external AC power.

Note: Unsaved information is lost if the Notebook is turned off without first saving the

data.

To activate Full Off mode, complete the following steps:

1. Click the Start button on the Windows taskbar.

2. Click Shut Down, then select Shut Down from the options.

To r esume fr om Full Off mode, press the Power button once.

ÄÄ

ÄCAUTION: The Notebook must be turned off (Full Off mode) when installing or

replacing components. Follow the instructions for putting the Notebook into

Full Off mode. Be sure to unplug the Notebook from the outlet, and remove the

battery pack (refer to the removal procedures section: Battery Pack) before

servicing any parts.

PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES BATTERY AND POWER MANAGEMENT 3

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Summary of Power Modes

The following table outlines the procedures for entering and exiting the various power modes, and

the external indicators for each mode.

Standby Mode Hibernation Mode Off Mode

Automatic

Activation

15 minutes if using

battery power* (preset

default)

When battery is low or

after 1 hour of

Standby*

Standard Shutdown*:

click Start on the

Windows taskbar, click

Shut Down, and then

Shut Down from menu

options.

Manual

Activation

Press Fn+F4 key

combination or click

Start on the Windows

taskbar, Shut Down, and

then Standby.

Press the Power Ÿ

button once.

Manual Shutdown**:

Press and hold down the

Power Ÿbutton for

four seconds.

Fn+Power (press and

hold the Fn key then

press the Power

button).

Resume/

Exit

Press any key. Press the Power Ÿ

button once.

Press the Power Ÿ

button once.

Indicators

Power light flashes and

Moon é icon appears on

status display.

Power light is off,

screen is blank, and

Power Ÿicon does not

appear on status

display.

Power light is off,

screen is blank, and

Power Ÿicon does not

appear on status

display.

* TThe Notebook will not automatically enter Standby or Hibernation mode if using AC power.

** Important: The Manual Shutdown procedure is not recommended unless the Standard Shutdown is

uuuunsuccessful.

4 BATTERY AND POWER MANAGEMENT PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Power Settings

Power management modes can be initiated based on the amount of time passed since the last

system activity. System activity includes keyboard strokes, mouse movement, CD/DVD playback,

and modem usage.

Power Schemes

Different patterns of Notebook use determine the level of power management needed. The Power

management settings can be selected using several predefined Power Schemes. To access these

options, select Power Management on the Control Panel, then click the Power Schemes tab. The

default Power Schemes are Home/Office Desk, Portable/Laptop, and Always On. Power Schemes can

also be customized by changing the following options:

•System Standby: the length of inactivity before the Notebook goes into Standby mode

•Turn Off Monitor: the length of inactivity before the screen times out and goes blank

•Turn Off Hard Disks: the length of inactivity before the hard drive goes into low-power

mode

Important: The setting for the Hard Disk must be less than or equal to the setting for

the System. If the Notebook is on a network, Compaq recommends that System

Standby be set to Never.

The following table shows the default settings for each Power Scheme.

Power Scheme AC Power Battery Power

Always On

System Standby

Turn OFF Monitor

Turn OFF Hard Disks

Hibernate

Never

20 minutes

Never

15 minutes

30 minutes

Never

Portable/Laptop

System Standby

Turn OFF Monitor

Turn OFF Hard Disks

Hibernate

Never

3 hours

15 minutes

Never

15 minutes

Never

10 minutes

1 hour

Home/Office Desk

System Standby

Turn OFF Monitor

Turn OFF Hard Disks

Hibernate

Never

20 minutes

Never

5 minutes

10 minutes

20 minutes

PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES BATTERY AND POWER MANAGEMENT 5

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Alarms

The Notebook can be set to Alarm when the battery power level is reduced or when it reaches a

critically low level. The Notebook can also be set to enter a low-power mode when the battery

reaches a specific power level.

ÄÄ

ÄCAUTION: The settings on the Alarms tab are preset for the Notebook to run at

optimum efficiency. Changing any of these settings may cause the Notebook to

function improperly. It is recommended that these settings be left at their default

values.

Rebooting After a Lockup

To reboot the Notebook when the keyboard is frozen, or when the screen is locked, press and hold

down the Power Ÿbutton for at least four seconds to perform a Manual Shutdown. Then restart the

Notebook with a single press of the Power Ÿbutton.

If the Notebook still does not recover, shut it down by pressing the Power Ÿbutton and holding it

down for four seconds. Then remove the battery and unplug the AC power for at least 30 seconds.

Reinsert the battery or reconnect AC power, and press the Power Ÿbutton once to reboot.

Recovering From a Loss of Electrical Power

Loss of electrical power causes the Notebook to turn off automatically. This may cause loss of data

because the Microsoft Windows operating system is not able to close all the files and programs

properly.

Loss of power may be caused by one of the following:

•Interruption of electrical power service

•Accidental disconnection of the power cord

Default Alarm Settings

Setting Low Battery Critical Battery

Alarm power level 10% 0%

Notification Sound No Action

Power Mode No Action Hibernation

Active Enabled Enabled

6 BATTERY AND POWER MANAGEMENT PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

If power surges or sags, the display and status lights may flicker, and the Notebook may

automatically restart. If an improper shutdown occurs, the Microsoft Windows utility program,

ScanDisk, runs automatically once power is restored. ScanDisk determines whether the improper

shutdown has caused any errors on the hard disk. These errors may occur if the Microsoft Windows

operating system is not able to close all files correctly before the shutdown. If no errors are found,

the restart process continues. If ScanDisk does detect errors, follow the instructions on the screen

to continue the restart process. Work or information that was not saved before the loss of power or

shutdown may be lost.

If a power failure occurs, or if the power cord disconnects while the Notebook is turned on, turn it off

until normal service is restored. The next time the Notebook is turned on, ScanDisk may run to

check the hard disk for errors caused by improper shutdown.

Increasing Battery Pack Operating Time

Battery pack operating life is affected by several variables. To avoid unnecessary replacement,

consider the following when determining how long a charged battery pack should last:

•Power conservation settings

•Hardware configuration

•Software applications

•Installed options

•Display brightness\\Server\projects\Compaq_Port\Portable TimesheetHard drive usage

•Changes in operating temperatures

•Type and number of installed PC cards

Note: Power consumption requirements for PC cards vary widely. Some cards drain the

battery pack very rapidly.

Battery pack operating life can be increased by as much as 50 percent by controlling the energy

required by the Notebook and the energy stored in the battery pack.

Minimizing the Energy Required

To minimize the energy required by the Notebook, follow these guidelines:

•Set the power conservation levels in the Power Management utility to Maximum.

•Customize the time-out value to work more efficiently with the applications. The length of

battery life depends on the values selected.

PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES BATTERY AND POWER MANAGEMENT 7

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Maximizing the Energy Stored

To maximize the energy stored in the battery pack, follow these guidelines:

•Condition a Battery Pack at least every 30 days to improve overall battery performance.

•Keep a battery pack in the Notebook when using it with AC power to supply the battery pack

with a constant trickle charge.

•Store the battery pack in a cool, dry place when not in use.

Conditioning a Battery Pack

ÄÄ

ÄCAUTION: To avoid loss of data, make sure that all information is saved before

completely discharging a battery pack.

To condition a battery pack, complete the following steps:

1. Plug in the AC adapter and allow the battery to charge until the fast charge arrow on the

status display disappears. The battery gauge may read 100% for a period of time before the

arrow disappears.

Note: Do not unplug the AC adapter until the arrow disappears.

2. Unplug the AC adapter and allow the battery to drain until the Notebook enters Hibernation

mode. The Notebook can be used normally during this process.

Note: If the AC adapter is connected while the battery is draining, the process must be

repeated, beginning with Step 1.

The battery is now reconditioned. Plug in the AC adapter and begin using the Notebook.

The table below shows typical battery charging times for each model.

Battery Charge Time

Li-ion Battery Pack Battery Power

Computer On Line 4.75 hours

Computer Off Line 3.00 hours

8 BATTERY AND POWER MANAGEMENT PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES

Presario 1400 Series

Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340,

XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356

Disposing of a Used Battery Pack

In the interests of safeguarding our environment, Compaq Computer Corporation recommends that

nickel metal hydride (NiMH) and lithium-ion (Li-ion) battery packs be recycled. Battery packs should

be handled in accordance with country, state, province, or local regulations.

ÅÅ

ÅWARNING: Battery pack contains harmful components when exposed. Do not

open, crush, puncture, or incinerate the battery pack. It contains no

field-serviceable parts. Dispose of battery packs properly. Failure to dispose

of battery packs properly may cause harm to humans, animals, and

the environment.

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