HP 8440P manual Using battery power, Connecting the AC adapter

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When you disconnect external AC power, the following events occur:

●The computer switches to battery power.

●The display brightness is automatically decreased to save battery life. To increase display brightness, press the fn+f10 hotkey or reconnect 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).

If provided with a 3-pin attachment plug on the power cord, plug the cord into a grounded (earthed) 3- pin outlet. Do not disable the power cord grounding pin, for example, by attaching a 2-pin adapter. The grounding pin is an important safety feature.

To connect the computer to external AC power, follow these steps:

1.Plug the AC adapter into the power connector (1) on 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).

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.

NOTE: The display brightness is decreased to save battery life when you disconnect AC power. To increase display brightness, use the fn+f10 hotkey or reconnect the AC adapter.

64 Chapter 5 Power management

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Contents HP EliteBook Product notice Safety warning notice Iv Safety warning notice Table of contents Pointing devices and keyboard Adjusting the volume Power management Drives Security 151 Xii Features Identifying hardwareTop components Pointing devicesLights Component DescriptionRapidly Buttons, switches, and fingerprint reader Panel System and Security Power OptionsKeys Front components Fn keyRear components Right-side componentsLeft-side components Bottom components Display components Wireless antennas select models only Identifying the labels Additional hardware componentsPage Wireless, modem, and local area network Using wireless devices select models onlyUsing the wireless controls Identifying wireless and network iconsUsing the wireless button Using Wireless Assistant software select models only Using HP Connection Manager select models onlyUsing operating system controls Setting up a Wlan Using a Wlan device select models onlyProtecting your Wlan Connecting to a Wlan Use a wireless transmitter with built-in securityRoaming to another network Using HP Mobile Broadband select models only Inserting a SIM select models onlyRemoving a SIM select models only Page Using a Bluetooth wireless device select models only Bluetooth and Internet Connection Sharing ICSTroubleshooting wireless connection problems Cannot create a Wlan connectionNetwork icon is not displayed Cannot connect to a preferred networkCurrent network security codes are unavailable Cannot connect to the wireless router Wlan connection is very weakUsing the modem select models only Connecting a modem cable purchased separatelyAdding new locations when traveling Selecting a location settingViewing the current location selection Solving travel connection problems Select Start Devices and PrintersClick Properties Connecting to a local area network LAN Using the keyboard Using pointing devicesPointing devices and keyboard Displaying system information Initiating SleepSwitching the screen image Viewing battery charge informationDecreasing screen brightness Increasing screen brightnessUsing HP QuickLook Using keypadsUsing the embedded numeric keypad Using an optional external numeric keypadSwitching key functions on the embedded numeric keypad Enabling and disabling the embedded numeric keypadCleaning the TouchPad, keyboard, and vents Adjusting the volume Multimedia featuresMultimedia Multimedia software Click Customize notification iconsAccessing your preinstalled multimedia software Installing multimedia software from a discAudio Connecting external audio devicesChecking your audio functions Page Connecting an external monitor or projector Using the external monitor portUsing the DisplayPort VideoPage Optical drive select models only Using optical discs CDs, DVDs, and BDsIdentifying the optical drive Selecting the right disc CDs, DVDs, and BDs CD-R discsCD-RW discs DVD±R discsPlaying a CD, DVD, or BD DVD±RW discsLightScribe DVD+R discs Blu-ray Discs BDsConfiguring AutoPlay Changing DVD region settingsObserving the copyright warning Copying a CD, DVD, or BDCreating burning a CD, DVD, or BD Removing an optical disc CD, DVD, or BDTroubleshooting Computer does not detect the optical drive Disc does not play Disc does not play automaticallyMovie stops, skips, or plays erratically Movie is not visible on an external displayDevice driver must be reinstalled Obtaining the latest HP device driversAdjusting webcam properties Webcam select models onlyCapturing business card images Page Power management Setting power optionsUsing power-saving states Initiating and exiting SleepUsing power plans Using the battery meterInitiating and exiting Hibernation Setting password protection on wakeup Viewing the current power planSelecting a different power plan Customizing power plansUsing external AC power Using Power Assistant select models onlyStarting Power Assistant Using battery power Connecting the AC adapterFinding battery information in Help and Support Using Battery CheckDisplaying the remaining battery charge Inserting or removing the batteryCharging a battery Maximizing battery discharge time Managing low battery levelsIdentifying low battery levels Resolving a low battery levelFully charge the battery Calibrating a batteryDisable Hibernation and Sleep Fully recharge the battery Discharge the batteryReenable Hibernation and Sleep Conserving battery power Storing a batteryDisposing of a used battery Replacing the batteryPower management Testing an AC adapter Shutting down the computerPage Drives Identifying installed drivesHandling drives Page Using Disk Cleanup Using Disk DefragmenterImproving hard drive performance Using HP 3D DriveGuard Identifying HP 3D DriveGuard statusUsing HP 3D DriveGuard software Replacing a hard drive in the hard drive bay Page Page Removing the protective insert Replacing a drive in the upgrade bayReplacing a hard drive Page Page Replacing an optical drive Page Page Connecting a USB device Using a USB deviceExternal devices Using USB legacy support Removing a USB deviceConnecting a 1394 device Using a 1394 deviceRemoving a 1394 device Page Using external drives Using optional external devicesUsing a docking device External media cards Using SD Card Reader cardsInserting a digital card Using ExpressCards select models only Configuring an ExpressCardRemoving a digital card Inserting an ExpressCardRemoving an ExpressCard Using smart cards select models only Inserting a smart card Removing a smart cardMemory modules Page Page Page Upgrading a memory module in the primary memory module slot Page Page Page Security Protecting the computerSetting passwords in Windows Using passwordsSetting passwords in Computer Setup Bios administrator password Managing a Bios administrator passwordUsing Computer Setup DriveLock Entering a Bios administrator passwordSetting a DriveLock password Entering a DriveLock passwordChanging a DriveLock password Removing DriveLock protectionEntering an Automatic DriveLock password Using Computer Setup Auto DriveLockRemoving Automatic DriveLock protection Viewing Computer Setup System Information Using Computer Setup security featuresSecuring system devices Using Computer Setup System IDs Using antivirus software Using firewall software Installing critical updates Using HP ProtectTools Security Manager select models only Installing a security cable Software updates Updating software Determining the Bios version Updating the BiosDownloading a Bios update Page Updating programs and drivers Click DownloadUsing SoftPaq Download Manager Backup and recovery Select Start All Programs Maintenance Backup and Restore Backing up your informationBackup and recovery Performing a recovery Using the Windows recovery toolsUsing f11 recovery tools Using a Windows 7 operating system DVD purchased separatelySelect Repair your computer Computer Setup Starting Computer SetupUsing Computer Setup Navigating and selecting in Computer SetupComputer Setup menus Restoring factory settings in Computer SetupFile menu Security menuSystem Configuration menu User Management requires a Bios administrator passwordUSB port to the computer Enable/disable Preboot Authentication on HP QuickLook Ansi MultiBoot About the boot device order Enabling boot devices in Computer Setup Considering boot order changes Choosing MultiBoot preferences Setting a new boot order in Computer SetupSetting a MultiBoot Express prompt Dynamically choosing a boot deviceEntering MultiBoot Express preferences Management and printing Using Client Management Solutions Configuring and deploying a software imageManaging and updating software HP Client Automation select models onlyHP SSM System Software Manager Using the HP Universal Print Driver Symbols/Numerics IndexDVD-ROM Jacks Ssid Wireless Assistant

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