HP Nx9420 Power

HP Nx9420 - Compaq Business Notebook Manual

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  • HP Nx9420 | Power - Page 1
    Power Document Part Number: 396855-001 March 2006 This guide explains how the computer uses power.
  • HP Nx9420 | Power - Page 2
    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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    controls 7 Battery packs Identifying battery packs 7-2 Inserting or removing the primary battery pack 7-3 Charging multiple battery packs 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
  • HP Nx9420 | Power - Page 4
    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
  • HP Nx9420 | Power - Page 5
    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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    Power control and light locations Component Description 2 Power button Windows® shutdown procedures cannot be used, press and hold the power button for at least 5 seconds to turn off the computer. 3 fn+f3 Initiates standby. 4 Battery light Amber: A battery pack is charging. Green: A battery
  • HP Nx9420 | Power - Page 7
    ❐ 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 aircraft. External power supplied through ■ AC adapter included with
  • HP Nx9420 | Power - Page 8
    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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    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. Please connect a higher
  • HP Nx9420 | Power - Page 10
    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 cleared. When the computer is in standby
  • HP Nx9420 | Power - Page 11
    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 off. If a power-on password has been set, you
  • HP Nx9420 | Power - Page 12
    , 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 > Performance and Maintenance > Power Options > Hibernate tab. Be sure that the
  • HP Nx9420 | Power - Page 13
    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
  • HP Nx9420 | Power - Page 15
    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. To prevent loss of information
  • HP Nx9420 | Power - Page 16
    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
  • HP Nx9420 | Power - Page 17
    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.* 1. Save your work and close all open applications
  • HP Nx9420 | Power - Page 18
    the computer from external power and remove the battery pack. For more information about removing and storing the battery pack, refer to "Battery packs." Initiating or resuming from standby Task Initiate standby. Procedure Result ■ With the computer on, press fn+f3. ■ In Windows XP Home, select
  • HP Nx9420 | Power - Page 19
    (default setting). ■ Power settings and timeouts can be changed using Power Options in Windows Control Panel. ■ The power lights blink. ■ The 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
  • HP Nx9420 | Power - Page 20
    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. Task Initiate hibernation. Procedure ■ In Windows XP Home, select Start > Turn Off Computer. Then
  • HP Nx9420 | Power - Page 21
    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 on. ■ Your work returns to the screen. *If you have
  • HP Nx9420 | Power - Page 22
    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
  • HP Nx9420 | Power - Page 23
    battery or external power. To remove the Power Meter icon from the notification area: 1. Right-click the Power Meter icon in the notification area, and then click Adjust Power the Power Meter icon in the notification area: 1. Select Start > Control Panel > Performance and Maintenance > Power Options.
  • HP Nx9420 | Power - Page 24
    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
  • HP Nx9420 | Power - Page 25
    speed on external power than on battery power. If the battery power is extremely low, the computer may attempt to conserve power by reducing processor speed and graphics performance. Windows XP enables you to manage the processor performance controls by selecting a power scheme. The processing
  • HP Nx9420 | Power - Page 26
    based on CPU determined based on CPU demand. demand. Max Battery Performance state is determined based on CPU demand. CPU performance is lower when the Max Battery setting is selected; however, battery life will be extended. *It is recommended that you use the Portable/Laptop power scheme
  • HP Nx9420 | Power - Page 27
    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 disconnected
  • HP Nx9420 | Power - Page 28
    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
  • HP Nx9420 | Power - Page 29
    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. To insert a primary
  • HP Nx9420 | Power - Page 30
    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
  • HP Nx9420 | Power - Page 31
    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
  • HP Nx9420 | Power - Page 32
    ■ If you are charging a new battery pack: ❏ Charge the battery pack while the computer is plugged into external power through the AC adapter. ❏ When you charge the battery pack, charge it fully before turning on the computer. ■ If you are charging an in-use battery pack: ❏ Allow the battery pack to
  • HP Nx9420 | Power - Page 33
    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
  • HP Nx9420 | Power - Page 34
    about 10 percent of a full charge through normal use before charging it. ■ When you charge a battery pack, charge it fully before turning on the computer. ■ If a battery pack has been unused for one month or more, calibrate the battery pack instead of simply charging it. For calibration instructions
  • HP Nx9420 | Power - Page 35
    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. For example
  • HP Nx9420 | Power - Page 36
    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
  • HP Nx9420 | Power - Page 37
    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: ■ AC adapter included with the computer ■ Optional docking device ■ Optional power adapter When a charged battery
  • HP Nx9420 | Power - Page 38
    - ■ 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 power. 2. Restore from hibernation by
  • HP Nx9420 | Power - Page 39
    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
  • HP Nx9420 | Power - Page 40
    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
  • HP Nx9420 | Power - Page 41
    your work before beginning the discharge procedure. ■ If you use the computer occasionally during the discharge procedure and have set energy-saving timeouts, expect the following performance from your system during the discharge process: ❏ The monitor will not turn off automatically. ❏ Hard drive
  • HP Nx9420 | Power - Page 42
    of the taskbar, and then click Adjust Power Properties. - or - Select Start > Control Panel > Performance and Maintenance > Power Options > Power Schemes tab. 2. Record the 4 settings in the Running on batteries and Plugged in columns so that you can reset them after the calibration. 3. Set the
  • HP Nx9420 | Power - Page 43
    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
  • HP Nx9420 | Power - Page 44
    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 leave your work, initiate standby or hibernation, or shut
  • HP Nx9420 | Power - Page 45
    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
  • HP Nx9420 | Power - Page 46
    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
  • HP Nx9420 | Power - Page 47
    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). Replace this battery pack only with the battery pack approved for this
  • HP Nx9420 | Power - Page 48
    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
  • HP Nx9420 | Power - Page 49
    control and light locations 1-1 schemes 5-3 sources 2-1 power button 1-3 power lights 1-2 Power Meter icon 5-2 power settings 4-1 power supply 3-5 R readable media 3-6 release latch, battery pack 7-4 reset (emergency shutdown procedures) 4-3 S screen saver 7-19 shutdown procedures 4-3 shutting down
  • HP Nx9420 | Power - Page 50
    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: 396855-001
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Power
Document Part Number: 396855-001
March 2006
This guide explains how the computer uses power.