HP 4310s - ProBook - Core 2 Duo 2.1 GHz User Manual

Power management - windows vista.
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Power Management
User Guide

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   Summary of Contents for HP 4310s - ProBook - Core 2 Duo 2.1 GHz

  • Page 1

    Power Management User Guide...

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    © Copyright 2009 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 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 ...................

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    Step 5: Reenable Hibernation and Sleep ................21 Conserving battery power ........................22 Storing a battery ..........................23 Disposing of a used battery ........................ 24 5 Shutting down the computer Index ................................... 26...

  • 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. NOTE: Your computer may look slightly different from the illustration in this section. Component Description Internal display switch Turns off the display if the display is closed while the power is on. fn+f5 Initiates Sleep.

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    Component Description To learn more about your power settings, select Start > Control Panel > System and Maintenance > Power Options. Chapter 1 Power control and light locations...

  • Page 7: Using Power-saving States, Initiating And Exiting Sleep

    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. Exiting Sleep is 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.

  • Page 8: Initiating And Exiting Hibernation

    Initiating and exiting Hibernation The system is set at the factory to initiate Hibernation after 1,080 minutes (18 hours) of inactivity when running on battery power, 1,080 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.

  • Page 9: Using The Battery Meter

    Using the battery meter The battery meter is located in the notification area, at the far right of the taskbar. The battery meter allows you to quickly access power settings, view remaining battery charge, and select a different power plan. ●...

  • Page 10: Using Power Plans, Viewing The Current Power Plan, Selecting A Different Power Plan

    Using power plans A power plan is a collection of system settings that manages how the computer uses power. Power plans can help you conserve power or maximize performance. You can change power plan settings or create your own power plan. Viewing the current power plan Move the pointer over the battery meter icon in the notification area, at the far right of the taskbar.

  • Page 11: Setting Password Protection On Wakeup

    Setting password protection on wakeup To set the computer to prompt for a password when the computer exits Sleep or Hibernation, follow these steps: Select Start > Control Panel > System and Maintenance > Power Options. In the left pane, click Require a password on wakeup. Click Change Settings that are currently unavailable.

  • Page 12: Using External Ac Power

    Using external AC power External AC power is supplied through an AC adapter or an optional power adapter. 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. Connect the computer to external AC power under any of the following conditions: WARNING! Do not charge the computer battery while you are onboard aircraft.

  • Page 13: 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 14: Testing An Ac Adapter

    Testing an AC adapter Test the AC adapter if the computer exhibits any of the following symptoms when it is connected to AC power: ● The computer will not turn on. ● The display does not turn on. ● The power light is off. To test the AC adapter: Remove the battery from the computer.

  • Page 15: 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 16: Finding Battery Information In Help And Support

    Finding battery information in Help and Support The Battery information section of the Help and Support Learning Center provides the following tools and information: ● Battery Check tool to test battery performance ● Information on calibration, power management, and proper care and storage to maximize battery life ●...

  • Page 17: Displaying The Remaining Battery Charge

    Displaying the remaining battery charge Move the pointer over the battery meter icon in the notification area, at the far right of the taskbar. ▲ – or – View the estimated number of minutes of battery charge remaining in Windows Mobility Center: Click the battery meter icon, and then click Windows Mobility Center.

  • Page 18: 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.

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    Remove the battery (2). Inserting or removing the battery...

  • Page 20: 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 or an optional power adapter. The battery charges whether the computer is off or in use, but it charges faster when the computer is off.

  • Page 21: Managing Low Battery Levels, Identifying 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 > System and Maintenance > Power Options). Preferences set using Power Options do not affect lights.

  • Page 22: Resolving A Low Battery Level, Resolving A Low Battery Level When External Power Is Available

    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 lights turn off. Resolving a low battery level when external power is available Connect one of the following devices: ▲...

  • Page 23: Calibrating A Battery, Step 1: Fully Charge The Battery, Step 2: Disable Hibernation And Sleep

    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 24: 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 25: Step 4: Fully Recharge The Battery, Step 5: Reenable Hibernation And Sleep

    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 26: 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 27: 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 28: 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; do not short external contacts; do not dispose of in fire or water. Refer to the Regulatory, Safety and Environmental Notices for battery disposal information. Chapter 4 Using battery power...

  • Page 29: 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 30: Index

    Index initiated during critical battery AC adapter level 17 writable media 3 connecting 9 initiating 4 testing 10 lights battery power 1 calibrating 19 low battery level 17 charging 16, 19 conserving power 22 operating system 25 disposing 24 inserting 14 low battery levels 17 power recharging 21...

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