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Power Management
User Guide


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    Power Management User Guide...

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    © Copyright 2008 Hewlett-Packard Product notice Development Company, L.P. This user guide describes features that are Windows is a U.S. registered trademark of common to most models. Some features Microsoft Corporation. may not be available on your computer. The information contained herein is subject to change without notice.

  • Page 3: Table Of Contents

    Table of contents 1 Power control and light locations 2 Shutting down the computer 3 Setting power options Using power-saving states ........................4 Initiating and exiting Standby ....................4 Initiating and exiting Hibernation ..................5 Using the Power Meter ......................... 6 Using power schemes ..........................

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    Storing a battery ..........................20 Disposing of a used battery ........................ 21 5 Using external AC power Connecting the AC adapter ........................ 23 Testing an AC adapter ........................24 Index ................................... 25...

  • Page 5: Power Control And Light Locations

    Power control and light locations The following illustration and table identify and describe the power control and light locations. Component Description ● Power button When the computer is off, press the button to turn on the computer. ● When the computer is on, press the button to shut down the computer.

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    Component Description ● Power light On: The computer is on. ● Blinking: The computer is in Standby. ● Off: The computer is off or in Hibernation. fn+f5 Initiates Standby. Component Description ● Battery light Amber: A battery is charging. ● Turquoise: A battery is close to full charge capacity.

  • Page 7: Shutting Down The Computer

    Shutting down the computer CAUTION: Unsaved information will be lost when the computer is shut down. The Shut Down command closes all open programs, including the operating system, and then turns off the display and computer. Shut down the computer under any of the following conditions: ●...

  • Page 8: Setting Power Options

    Setting power options Using power-saving states The computer has two power-saving states enabled at the factory: Standby and Hibernation. When Standby is initiated, the power lights blink and the screen clears. Your work is saved to memory. Exiting Standby is faster than exiting Hibernation. If the computer is in Standby for an extended period or if the battery reaches a critical battery level while in Standby, the computer initiates Hibernation.

  • Page 9: Initiating And Exiting Hibernation

    When the computer exits Standby, 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 when the computer exits Standby, 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 30 minutes of inactivity when running on battery power or when the battery reaches a critical battery level.

  • Page 10: Using The Power Meter

    Using the Power Meter The Power Meter is located in the notification area, at the far right of the taskbar. The Power Meter allows you to quickly access power settings and view the remaining battery charge. ● To access Power Options, right-click the Power Meter icon and select Adjust Power Properties.

  • Page 11: Using Power Schemes

    Using power schemes A power scheme is a collection of system settings that manages how the computer uses power. Power schemes can help you conserve power and maximize computer performance. The following power schemes are available: ● Portable/Laptop (recommended) ● Home/Office Desk ●...

  • Page 12: Setting Password Protection Upon Exiting Standby

    Setting password protection upon exiting Standby To set the computer to prompt for a password when the computer exits Standby, follow these steps: Right-click the Power Meter icon in the notification area, and then click Adjust Power Properties. Click the Advanced tab. Select the Prompt for password when computer resumes from standby check box.

  • Page 13: Using Battery Power

    Using battery power When a charged battery 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 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.

  • Page 14: Finding Battery Information In Help And Support

    Finding battery information in Help and Support To locate battery information for your computer, select Start > Help and Support > Learn More About Your PC. Chapter 4 Using battery power...

  • Page 15: Displaying The Remaining Battery Charge

    Displaying the remaining battery charge Double-click the Power Meter icon in the notification area, at the far right of the taskbar. ▲ – or – Select Start > Control Panel > Performance and Maintenance > Power Options > Power Meter tab. Most charge indicators report battery status as both a percentage and as the number of minutes of charge remaining: ●...

  • Page 16: Inserting Or Removing The Battery

    Inserting or removing the battery CAUTION: Removing a battery that is the sole power source can cause loss of information. To prevent loss of information, save your work and initiate Hibernation, or shut down the computer through Windows before removing the battery. To insert the battery: Turn the computer upside down on a flat surface, with the battery bay toward you.

  • Page 17: Charging A Battery

    Charging a battery WARNING! Do not charge the computer battery while you are onboard aircraft. The battery charges whenever the computer is plugged into external power through an AC adapter, an optional power adapter, an optional expansion product, or an optional docking device. The battery charges whether the computer is off or in use, but it charges faster when the computer is off.

  • Page 18: Managing Low Battery Levels

    Managing low battery levels The information in this section describes the alerts and system responses set at the factory. Some low- battery alerts and system responses can be changed using Power Options in Windows Control Panel (Start > Control Panel > Performance and Maintenance > Power options). Preferences set using Power Options do not affect lights.

  • Page 19: Resolving A Low Battery Level

    Resolving a low battery level CAUTION: To reduce the risk of losing information when the computer reaches a critical battery level and has initiated Hibernation, do not restore power until the power light turns off. Resolving a low battery level when external power is available Connect one of the following devices: ▲...

  • Page 20: Calibrating A Battery

    Calibrating a battery Calibrate a battery under the following conditions: ● When battery charge displays seem inaccurate ● When you observe a significant change in battery run time Even if a battery is heavily used, it should not need to be calibrated more than once a month. It is also not necessary to calibrate a new battery.

  • Page 21: Step 3: Discharge The Battery

    Step 3: Discharge the battery The computer must remain on while the battery is being discharged. The battery can discharge whether or not you are using the computer, but the battery will discharge faster while you are using it. ● If you plan to leave the computer unattended during the discharge, save your information before beginning the discharge procedure.

  • Page 22: Step 4: Fully Recharge The Battery

    Step 4: Fully recharge the battery To recharge the battery: Plug the computer into external power and maintain external power until the battery is fully recharged. When the battery is recharged, the battery light on the computer turns off. You can use the computer while the battery is recharging, but the battery will charge faster if the computer is off.

  • Page 23: Conserving Battery Power

    Conserving battery power ● Select low power-use settings through Power Options in Windows Control Panel. ● Turn off wireless and local area network (LAN) connections and exit modem applications when you are not using them. ● Disconnect external devices that are not plugged into an external power source, when you are not using them.

  • Page 24: Storing A Battery

    Storing a battery CAUTION: To prevent damage to a battery, do not expose it to high temperatures for extended periods of time. If a computer will be unused and unplugged from external power for more than 2 weeks, remove the battery and store it separately.

  • Page 25: Disposing Of A Used Battery

    Disposing of a used battery WARNING! To reduce the risk of fire or burns, do not disassemble, crush, or puncture a battery; short the external contacts on a battery; or dispose of a battery in fire or water. Do not expose a battery to temperatures above 60˚C (140˚F).

  • Page 26: Using External Ac Power

    Using external AC power External AC power is supplied through one of the following devices: WARNING! To reduce potential safety issues, use only the AC adapter provided with the computer, a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP. ●...

  • Page 27: Connecting The Ac Adapter

    Connecting the AC adapter 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 28: Testing An Ac Adapter

    Testing an AC adapter Test the AC adapter if the computer exhibits any of the following symptoms: ● The computer will not turn on when it is connected to the AC adapter and external power. ● The display does not turn on when the computer is connected to the AC adapter and external power.

  • Page 29: Index

    Index initiated during critical battery AC adapter level 14 unresponsive system 3 connecting 23 initiating 5 testing 24 writable media 4 lights battery battery 2 calibrating 16 power 2 charging 13, 16 low battery level 14 conserving power 19 disposing 21 operating system 3 inserting 12 low battery levels 14...

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