HP dm4-1162us, dm4-1160us manual Using battery power, Testing an AC adapter, Identifying batteries

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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 lights are off.

To test the AC adapter:

1.Remove the battery from the computer.

2.Connect the AC adapter to the computer, and then plug it into an AC outlet.

3.Turn on the computer.

If the power lights turn on, the AC adapter is working properly.

Contact technical support for information on obtaining a replacement AC power adapter. Select Start > Help and Support > Get assistance.

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 f3 action key or reconnect the AC adapter.

You can keep a battery in the computer or in storage, depending on how you work. Keeping the battery in the computer whenever the computer is plugged into AC power charges the battery and also protects your work in case of a power outage. However, a battery in the computer slowly discharges when the computer is off and unplugged from external power.

WARNING! To reduce potential safety issues, use only the battery provided with the computer, a replacement battery provided by HP, or a compatible battery purchased from HP.

Computer battery life varies, depending on power management settings, programs running on the computer, display brightness, external devices connected to the computer, and other factors.

Identifying batteries

One lithium-ion battery is included with your computer.

54 Chapter 5 Power management

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Contents HP Pavilion Notebook PC Product notice Safety warning notice Iv Safety warning notice Table of contents Pointing devices and keyboard Power management Drives Disabling and enabling QuickWeb 104 Features Identifying the hardwareTop components TouchPadComponent Description Power light White Power is on LightsPower button and fingerprint reader Panel System and Security Power OptionsKeys Fn keyFront components Right-side componentsLeft-side components Display components Wireless antennas Bottom componentsComponent Description Labels Additional hardware componentsComponent Description Using wireless devices Identifying wireless and network status iconsNetworking Icon Name DescriptionUsing the wireless action key Using the wireless controlsUsing HP Wireless Assistant software Using a Wlan Using operating system controlsSetting up a Wlan Protecting your WlanConnecting to a Wlan Roaming to another network Using HP Mobile Broadband select models onlyInserting a SIM Removing a SIM Using Bluetooth wireless devices Bluetooth and Internet Connection Sharing ICSCannot connect to a Wlan Troubleshooting wireless connection problemsCannot connect to a preferred Wlan network Network icon is not displayed Current Wlan network security codes are unavailableCannot connect to the wireless router Connecting to a local area network LANWlan connection is very weak Page Using pointing devices Setting pointing device preferencesUsing the TouchPad Pointing devices and keyboardSelecting Using TouchPad gestures ScrollingConnecting an external mouse Using the action keysIcon Action Description Using the hotkeys Cleaning the TouchPad and keyboard Icon Function Hotkey DescriptionPointing devices and keyboard Multimedia Multimedia featuresIdentifying your multimedia components Multimedia Using the media activity action keys Using the media activity functionsMultimedia software Using HP MediaSmart software Opening preinstalled multimedia softwareUsing other multimedia software Installing multimedia software from a disc Connecting external audio devicesAudio Checking your audio functionsUsing the audio-out headphone jack Using the audio-in microphone jackUsing the external monitor port VideoConnecting an Hdmi device Configuring audio for Hdmi select models only Identifying the installed optical driveOptical drive Using optical discs CDs, DVDs, and BDs Selecting the right disc CDs, DVDs, and BDsCD-R discs LightScribe CD orPlaying a CD, DVD, or BD Configuring AutoPlay Changing DVD region settingsCopying a CD or DVD Observing the copyright warningCreating burning a CD, DVD, or BD Removing an optical disc CD, DVD, or BD Troubleshooting Computer does not detect the optical drivePreventing playback disruptions Disc does not playDisc does not play automatically Movie stops, skips, or plays erraticallyDevice driver must be reinstalled Movie is not visible on an external displayWebcam Obtaining the latest HP device driversAdjusting webcam properties Power management Setting power optionsUsing power-saving states Initiating and exiting SleepUsing the battery meter Using power plansViewing the current power plan Initiating and exiting HibernationUsing external AC power Setting password protection on wakeupSelecting a different power plan Customizing power plansConnecting the AC adapter Testing an AC adapter Using battery powerIdentifying batteries Finding battery information in Help and Support Using Battery CheckDisplaying the remaining battery charge Inserting or removing the batteryPage Maximizing battery discharge time Charging a batteryManaging low battery levels Identifying low battery levels Calibrating a batteryResolving a low battery level Fully charge the battery Disable Hibernation and SleepFully recharge the battery Discharge the batteryReenable Hibernation and Sleep Switching between graphics modes select models only Conserving battery powerStoring a battery Disposing of a used batteryShutting down the computer Click Shut downDrives Identifying installed drivesHandling drives Using HP ProtectSmart Hard Drive Protection Using Disk DefragmenterUsing Disk Cleanup Improving hard drive performanceUsing HP ProtectSmart Hard Drive Protection software Identifying HP ProtectSmart Hard Drive Protection statusReplacing the hard drive Page Page Page Page Using a USB device Connecting a USB deviceExternal devices Removing a USB deviceConnecting an eSATA device Using an eSATA deviceRemoving an eSATA device Page External media cards Using Digital Media Slot cardsInserting a digital card Removing a digital card Memory modules Adding or replacing memory modulesPage Page Upgrading a memory module in the primary memory module slot Page Page Page Using passwords Computer risk Security featureSecurity Protecting the computerSetting passwords in Setup Utility Setting passwords in WindowsPassword Function Administrator password Managing an administrator passwordUsing antivirus software Power-on passwordInstalling critical security updates Using firewall softwareInstalling an optional security cable Using the fingerprint reader Locating the fingerprint readerRegistering fingerprints Using your registered fingerprint to log on to Windows HP QuickWeb Disabling and enabling QuickWebSetup Utility Starting Setup UtilityUsing Setup Utility Changing the language of Setup UtilityRestoring default settings in Setup Utility Navigating and selecting in Setup UtilityDisplaying system information Setup Utility menus Exiting Setup UtilitySystem Configuration menu Main menuDiagnostics menu Primary Hard Disk Self TestUpdating the Bios Software updatesDetermining the Bios version Downloading a Bios update Updating programs and driversPage Backup and Recovery Creating recovery discsBacking up your information Using Windows Backup and Restore Using system restore pointsWhen to create restore points Create a system restore pointRecovering from the recovery discs Performing a recoveryRestore to a previous date and time Click System Recovery in the Recovery Manager window Symbols/Numerics IndexDVD-ROM SIM SSD