Compaq nw9440 Power

Compaq nw9440 - Mobile Workstation Manual

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  • Compaq nw9440 | Power - Page 1
    Power Document Part Number: 396855-001 March 2006 This guide explains how the computer uses power.
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    2 Power sources Connecting the AC adapter 2-2 3 Standby and hibernation Standby 3-1 Hibernation 3-2 Initiating standby, hibernation or shutdown 3-4 When you leave your work 3-4 When a reliable power supply is unavailable 3-5 When using wireless communication, or readable or writable drive
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    7-5 Charging a battery pack 7-6 Monitoring the charge of a battery pack 7-8 Managing low-battery conditions 7-10 Identifying low-battery conditions 7-10 Resolving low-battery conditions 7-11 Calibrating a battery pack 7-13 When to calibrate 7-13 How to calibrate 7-13 Conserving battery power
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    1 Power control and light locations The following illustration and table identify and describe the power control and light locations. ✎ Your computer may look slightly different from the illustration in this section. Power 1-1
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    and light locations Component 1 Power lights* (2) Description On: The computer is on. Blinking: The computer is in standby. Blinking rapidly: An HP Smart AC Adapter (hereafter referred to as AC adapter) with a higher power rating should be connected. Off: The computer is off or in hibernation
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    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. *There are 2 power lights. Both display the same information. The light on the
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    one of the following devices: ❐ AC adapter included with the computer ❐ Optional docking device ❐ Optional power adapter External power supplied through ■ AC adapter included with the computer ■ Optional docking device ■ Optional power adapter Å Do not charge the computer battery pack on board
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    Connecting the AC adapter Å WARNING: 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
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    following pop-up messages may be displayed after turning on the computer: ■ "Smart AC adapter power output is too low for this computer." Clicking the message will display the following additional information: "The output power of the HP Smart AC Adapter connected to your computer is insufficient
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    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
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    or disconnect external devices. ■ Do not insert or remove an external media card. 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
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    . However, if hibernation is disabled and the system reaches a low-battery condition, the system will not automatically save your work while power is on or when standby has been initiated. Use Power Options in Microsoft® Windows® Control Panel to reenable hibernation: » Select Start > Control Panel
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    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. Initiating hibernation saves your work to a hibernation file on the hard drive, and then shuts down
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    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, take one of the following
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    If the computer is in standby or hibernation, you cannot initiate a Bluetooth or WLAN transmission. ■ If standby or hibernation is accidentally initiated during playback of a drive medium such as a CD, a DVD, or an external media card: ❏ Your playback may be interrupted. ❏ You may see the following
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    section explains the default standby, hibernation, and shutdown procedures. For information about changing the function of some of the power features on the computer, refer to "Power options." The controls and lights discussed in this chapter are illustrated in "Power control and light locations
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    the computer or display on or off Task Procedure Result Turn on the computer. Press the power button. ■ The power lights are turned on. ✎ If the power lights blink rapidly, an AC adapter with a higher power rating should be connected. ■ The operating system loads. Shut down the computer
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    normal Windows shutdown procedures, try the following emergency procedures in the sequence provided: ■ Press ctrl+alt+delete. Then, select Shut Down > Turn Off. ■ Press and hold the power button for at least 5 seconds. ■ Disconnect the computer from external power and remove the battery pack. For
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    or hibernation, and the display will be turned off. Resume from user-initiated standby. Press the power button. ■ The power lights are turned on. ■ Your work returns to the screen. *If you have been registered to a network domain, the button you click will be called Shut Down instead of Turn
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    . ■ In Windows XP Professional, select Start > Turn Off Computer. Then, hold down the shift key as you select Hibernate. (If hibernate is not displayed, press the up or down arrow, select Hibernate from the list, and then click OK.)* Result ■ The power lights are turned off. ■ The screen clears
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    a critical low-battery condition. ■ The power lights are turned off. ■ The screen clears. Restore from user-initiated or system-initiated hibernation. ✎ Power settings and timeouts can be changed using Power Options in Windows Control Panel. Press the power button.† ■ The power lights are turned
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    options You can change many default power settings in Windows Control Panel. For example, you can set an audio alert to warn you when the battery pack reaches a low-power condition, or you can change the default settings for the power button. By default, when the computer is on: ■ Pressing fn+f3
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    Power options Displaying the Power Meter icon By default, the Power Meter icon appears in the notification area, at the far right of the taskbar. The icon changes shape to indicate whether the computer is running on battery or external power. To remove the Power Meter icon from the notification area
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    on whether the computer is running on a battery pack or on external power. You can also set a power scheme that initiates standby or turns off the display or hard drive after a time interval that you specify. To set a power scheme: 1. Right-click the Power Meter icon in the notification area, and
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    another hard surface, such as a printer, or a soft surface, such as a pillow, thick rug, or clothing, to block the airflow. Overheating can damage the computer and reduce processor performance. ✎ In some cases, the computer may operate at a higher speed on external power than on battery power. If
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    Processor performance Processor performance while on external power while on battery power Home/Office Desk Always runs at the highest performance state. Performance state is determined based on CPU demand. Portable/Laptop* (default) Performance state is Performance state is determined
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    plugged into external AC power, the computer runs on AC power. If the computer contains a charged battery pack and is running on external AC power supplied through the AC adapter, the computer switches to battery power if the AC adapter is disconnected from the computer. ✎ The display brightness is
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    This computer supports up to 2 battery packs: ■ One primary lithium-ion battery pack is included with the computer. ■ The accessory battery pack is an optional battery pack that can be attached to the bottom of the computer. If the computer will be unused and disconnected from external power for
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    Ä CAUTION: To prevent loss of work when removing a battery pack that is the sole power source, initiate hibernation or turn off the computer before removing the battery pack. ✎ Battery packs may vary in appearance by model. To insert a primary battery pack: 1. Turn the computer upside down on a flat
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    battery pack: 1. Turn the computer upside down on a flat surface, with the battery bay facing you. 2. Slide the right-hand battery pack release latch 1 to the right. 3. Slide and hold the left-hand battery pack release latch 2 to the right. 4. Remove the battery pack 3 from the computer. 7-4 Power
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    battery packs are fully charged. The primary battery pack charges when it is inserted into the computer and the computer is plugged into external power. External power can be supplied through the following: ■ AC adapter included with the computer ■ Optional docking device ■ Optional power adapter
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    charge displays: Å WARNING: Do not charge the computer battery pack on board aircraft. Charging the battery pack may damage aircraft electronic systems. ■ If you are charging a new battery pack: ❏ Charge the battery pack while the computer is plugged into external power through the AC adapter
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    into external power through an AC adapter, an optional docking device, or an optional power adapter. A battery pack inserted in the computer charges whether the computer is off or in use, but the battery pack charges faster while the computer is off. Charging may be delayed if a battery pack is
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    instructions, refer to "Calibrating a battery pack." Displaying charge information on the screen This section explains how to access and interpret battery charge indicators. Viewing charge displays To view information about the status of any battery pack in the computer: ■ Double-click the Power
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    to provide power at the current level. For example, the time remaining will decrease when you start playing a DVD and will increase when you stop playing a DVD. ■ When a battery pack is charging, a lightning bolt icon may be superimposed over the battery icon on the Power Meter screen. Power 7-9
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    can be changed using Power Options in Windows Control Panel. Preferences set using Power Options do not affect lights. Identifying low-battery conditions This section explains how to identify low-battery and critical low-battery conditions. Low-battery condition When a battery pack that is the
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    available, connect one of the following: ■ AC adapter included with the computer ■ Optional docking device ■ Optional power adapter When a charged battery pack is available To resolve a low-battery condition when a charged battery pack is available: 1. Turn off the computer or initiate hibernation
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    : ■ Initiate hibernation. - or - ■ Save your work and shut down the computer. When the computer cannot restore from hibernation To resolve a low-battery condition when the computer lacks the power to restore from hibernation: 1. Insert a charged battery pack or plug the computer into external
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    charge displays seem inaccurate ■ When you observe a significant change in battery run time ■ When the battery pack has been unused for one month or more How to calibrate Three steps are involved in calibrating a battery pack: fully charging, fully discharging, and then fully recharging. Power
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    computer to an AC adapter, optional power adapter, or optional docking device, and then plug the adapter or device into external power. The battery light on the computer is turned on. 3. Leave the computer plugged into external power until the battery pack is fully charged. The battery light on the
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    Power Options > Hibernate tab. 2. Clear the Enable hibernation check box. 3. Click Apply. The computer must remain on when the battery pack is being discharged. The battery Hard drive speed will not decrease automatically while the computer is idle. ❏ System-initiated standby will not occur. Power
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    computer. 6. Run the computer on battery power until the battery pack is fully discharged. The battery light begins to blink when the battery pack has discharged to a low-battery condition. When the battery pack is fully discharged, the battery light is turned off and the computer shuts down. 7-16
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    computer is off. 2. If the computer is off, turn it on when the battery pack is fully charged and the battery light is turned off. 3. Select Start > Control Panel > Performance and Maintenance > Power Options > Power Schemes tab. 4. Reenter the settings that you recorded for the items in the Plugged
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    hotkeys to adjust screen brightness as you need it. ■ Use optional powered speakers instead of the internal speakers, or adjust system volume as you need it. ■ Turn off a device connected to the S-Video-out jack by using the fn+f4 hotkey or by turning off support for the device in Windows. ■ If you
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    Battery packs Selecting power conservation settings To set the computer to conserve power: ■ Select a short wait for the screen saver and select a screen saver with minimal graphics and motion. To access screen saver settings: Select Start > Control Panel > Appearance and Themes > Choose a screen
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    AC adapter provided by HP, or an AC adapter purchased as an accessory from HP should be used with the computer. Ä CAUTION: To prevent damage to a battery pack, do not expose it to high temperatures for extended periods of time. If a computer will be unused and unplugged from external power
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    ; or dispose of a battery pack in fire or water. Do not expose a battery pack to temperatures above 60°C (140°F). Replace this battery pack only with the battery pack approved for this computer. Refer to the Regulatory, Safety, and Environmental Notices for battery disposal information. Power 7-21
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    A AC adapter 1-2, 2-1, 2-3, 7-1, 7-5 B battery charge information 7-8 battery light displaying charge status 7-7, 7-10 identifying 1-3 battery pack battery power vs. AC power 7-1 calibrating 7-13 charging 7-6, 7-14 conserving power 7-18 disposing of 7-21 identifying 7-2 inserting 7-3 low-battery
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    Index hotkeys, fn+f3 1-3, 4-3 HP Smart AC Adapter. See AC adapter 1-2 L lights, power/standby 1-2 low-battery condition 7-10 N notebook display, turning on or off 4-2 O operating system 4-2 optional power adapter 7-14 P power conserving 7-18 control and light locations 1-1 schemes 5-3 sources 2-1
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    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. Power First Edition March 2006 Document Part Number: 396855
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Power
Document Part Number: 396855-001
March 2006
This guide explains how the computer uses power.