Compaq nw9440 - Mobile Workstation Manual
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- Page 1 Power Document Part Number: 396855-001 March 2006 This guide explains how the computer uses power.
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Page 2: Table Of Contents
Contents 1 Power control and light locations 2 Power sources Connecting the AC adapter ....2–2 3 Standby and hibernation Standby........3–1 Hibernation. - Page 3 Contents 6 Processor performance controls 7 Battery packs Identifying battery packs ......7–2 Inserting or removing the primary battery pack..7–3 Charging multiple battery packs .
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Page 4: Power Control And Light Locations
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... - Page 5 Power control and light locations Component Description Power lights* (2) 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.
- Page 6 Power control and light locations Component Description Power 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.
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Page 7: Power Sources
Power sources The computer can run on internal or external AC power. The following table indicates the best power source for common tasks. ✎ Older AC adapters will not work with this computer. Task Recommended power source ■ Work in most software Charged battery pack in the computer applications ■... -
Page 8: Connecting The Ac Adapter
Power sources 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 from the computer). - Page 9 Power sources To connect the computer to external AC power: 1. Plug the AC adapter into the power connector 1 on the left side 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. Depending on the AC adapter connected, one of the following pop-up messages may be displayed after turning on the computer: ■...
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Page 10: Standby And Hibernation
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 Ä CAUTION: To avoid a complete battery discharge, do not leave the computer in standby for extended periods. -
Page 11: Hibernation
Standby and hibernation Hibernation Ä CAUTION: 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. - Page 12 Standby and hibernation Ä CAUTION: To reduce the risk of information loss, save your work 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 while power is on or when standby has been initiated.
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Page 13: Initiating Standby, Hibernation Or Shutdown
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 or perform any computer functions while the computer is in standby or hibernation. -
Page 14: When A Reliable Power Supply Is Unavailable
Standby and hibernation When a reliable power supply is unavailable Be 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. -
Page 15: When Using Wireless Communication, Or Readable Or Writable Drive Media
Standby and hibernation When using wireless communication, or readable or writable drive media Ä CAUTION: To prevent possible audio and video degradation, or loss of audio or video playback functionality, do not initiate standby or hibernation while reading or writing to a CD, DVD, or external media card. -
Page 16: Default Power Settings
Default power settings This 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 “Power options.” The controls and lights discussed in this chapter are illustrated in “Power control and light locations.”... -
Page 17: Turning The Computer Or Display On Or Off
Default power settings Turning the computer or display on or off Task Procedure Result ■ The power lights are Turn on the Press the power button. computer. turned on. ✎ If the power lights blink rapidly, an AC adapter with a higher power rating should be connected. -
Page 18: Using Emergency Shutdown Procedures
Default power settings Using emergency shutdown procedures Ä CAUTION: Emergency shutdown procedures result in the loss of unsaved information. If the computer is unresponsive and you are unable to use normal Windows shutdown procedures, try the following emergency procedures in the sequence provided: ■... - Page 19 Default power settings Task Procedure Result ■ The power lights Allow the system No action required: to initiate blink. ■ If the computer is running standby. ■ The screen on battery power, the system initiates standby after 10 minutes of clears.
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Page 20: Initiating Or Restoring From Hibernation
Default power settings Initiating or restoring from hibernation Hibernation cannot be initiated unless it is enabled. Hibernation is enabled by default. To verify that hibernation remains enabled: » Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate tab. If hibernation is enabled, the Enable hibernation check box is selected. - Page 21 Default power settings Task Procedure Result ■ The power lights are Allow the system No action required. If the to initiate computer is running on battery turned off. hibernation (with power, the system initiates ■ The screen clears. hibernation hibernation enabled).
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Page 22: Power Options
Power 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: ■... -
Page 23: Displaying The Power Meter Icon
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: 1. -
Page 24: Setting Or Changing A Power Scheme
Power options Setting or changing a power scheme The Power Schemes tab in the Power Options Properties dialog box assigns power levels to system components. You can assign different schemes, depending 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. -
Page 25: Processor Performance Controls
Processor performance controls Ä CAUTION: To prevent computer overheating, do not obstruct vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as a printer, or a soft surface, such as a pillow, thick rug, or clothing, to block the airflow. - Page 26 Processor performance controls After a power scheme has been set, no other intervention is required to control the performance of your computer processor. The following table describes the processor performance on external and battery power for the available power schemes. Processor performance Processor performance Power scheme...
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Page 27: Battery Packs
Battery packs When a charged battery pack is in the computer and the computer is not plugged into external power, the computer runs on battery power. When the computer is 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... -
Page 28: Identifying Battery Packs
Battery packs Identifying battery packs 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 more than 2 weeks, remove the battery pack and store it as described in... -
Page 29: Inserting Or Removing The Primary Battery Pack
Battery packs Inserting or removing the primary battery pack 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. - Page 30 Battery packs To remove a primary 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.
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Page 31: Charging Multiple Battery Packs
Battery packs Charging multiple battery packs Multiple battery packs in the system charge and discharge in a preset sequence: ■ Charge sequence: 1. Primary battery in the computer battery bay 2. Optional accessory battery ■ Discharge sequence: 1. Optional accessory battery 2. -
Page 32: Charging A Battery Pack
Battery packs Charging a battery pack To prolong battery life and optimize accuracy of battery 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: ❏... - Page 33 Battery packs A battery pack inserted in the computer charges whenever the computer is plugged 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.
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Page 34: Monitoring The Charge Of A Battery Pack
Battery packs Monitoring the charge of a battery pack This section explains several ways to determine the amount of charge in a battery pack. Obtaining accurate charge information To increase the accuracy of all battery charge indicators: ■ Allow a battery pack to discharge to about 10 percent of a full charge through normal use before charging it. -
Page 35: Interpreting Charge Indicators
Battery packs Interpreting Charge Indicators Most charge indicators report battery status as both a percentage and as the number of minutes of charge remaining: ■ The percentage indicates the approximate amount of charge remaining in the battery pack. ■ The time indicates the approximate running time remaining on the battery pack if the battery pack continues to provide power at the current level. -
Page 36: Managing Low-Battery Conditions
Battery packs Managing low-battery conditions The information in this section describes the alerts and system responses set at the factory. Some low-battery condition alerts and system responses can be changed using Power Options in Windows Control Panel. Preferences set using Power Options do not affect lights. -
Page 37: Resolving Low-Battery Conditions
Battery packs Resolving low-battery conditions Ä CAUTION: To reduce the risk of losing information when the computer reaches a critical low-battery condition and has initiated hibernation, do not restore power until the power lights are turned off. When external power is available To resolve a low-battery condition when external power is available, connect one of the following: ■... -
Page 38: When No Power Source Is Available
Battery packs When no power source is available To resolve a low-battery condition when no power source is available: ■ 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:... -
Page 39: Calibrating A Battery Pack
Battery packs Calibrating a battery pack When to calibrate Even if a battery pack is heavily used, it should not be necessary to calibrate it more than once a month. It is not necessary to calibrate a new battery pack before first use. Calibrate the battery pack under the following conditions: ■... - Page 40 Battery packs Step 1: Charging the battery pack A battery pack can charge whether the computer is off or in use, but it will charge faster when the computer is off. Å WARNING: Do not charge the computer battery pack on board aircraft.
- Page 41 Battery packs Step 2: Discharging the battery pack Before you begin a full discharge, disable hibernation. To disable hibernation: 1. Select Start > Control Panel > Performance and Maintenance > Power Options > Hibernate tab. 2. Clear the Enable hibernation check box 3.
- Page 42 Battery packs To fully discharge a battery pack: 1. Right-click the Power Meter icon in the notification area, at the far right of the taskbar, and then click Adjust Power Properties. – or – Select Start > Control Panel > Performance and Maintenance >...
- Page 43 Battery packs Step 3: Recharging the battery pack To recharge the battery pack: 1. Plug the computer into external power and maintain external power until the battery pack is fully recharged. When the battery pack is recharged, the battery light on the computer is turned off.
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Page 44: Conserving Battery Power
Battery packs Conserving battery power Using the battery conservation procedures and settings described in this section extends the time that a battery pack can run the computer from a single charge. Conserving power as you work To conserve power as you use the computer: ■... -
Page 45: Selecting Power Conservation Settings
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 saver. -
Page 46: Storing A Battery Pack
Battery packs Storing a battery pack Å WARNING: To avoid potential safety issues, only the AC adapter provided with the computer, a replacement AC adapter provided by HP, or an AC adapter purchased as an accessory from HP should be used with the computer. -
Page 47: Disposing Of A Used Battery Pack
Battery packs Disposing of a used battery pack Å WARNING: To reduce the risk of fire or burns, do not disassemble, crush, or puncture a battery pack; short the external contacts on a battery pack; or dispose of a battery pack in fire or water. Do not expose a battery pack to temperatures above 60°C (140°F). - Page 48 Index AC adapter 1–2 2–1 2–3 calibration, battery 7–13 7–1 7–5 charging battery packs 7–6 conservation, power 7–18 critical low-battery condition battery charge information 7–8 7–10 battery light displaying charge status 7–7 7–10 default power settings 4–1 identifying 1–3 drive media 3–6 battery pack battery power vs.
- Page 49 Index hotkeys, 1–3 4–3 software, Power Meter 5–1 fn+f3 HP Smart AC Adapter. See standby AC adapter 1–2 defined 3–1 initiating 4–3 resuming from 4–3 lights, power/standby 1–2 low-battery condition 7–10 temperature, storage, battery pack 7–20 notebook display, turning on traveling with the notebook, or off 4–2 battery pack temperature...
- Page 50 © Copyright 2006 Hewlett-Packard Development Company, L.P. Microsoft and Windows are U.S. registered trademarks 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.