HP XU103UT manual Testing an AC adapter

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When you connect the computer to external AC power, the following events occur:

●The battery begins to charge.

●If the computer is turned on, the power meter icon in the notification area changes appearance. 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.

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 does not turn on.

●The display does not turn on.

●The power lights are off.

To test the AC adapter:

1.Shut down the computer.

2.Remove the battery from the computer.

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

4.Turn on the computer.

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

●If the power lights remain off, the AC adapter is not functioning and should be replaced. Contact HP Customer Support for information on obtaining a replacement AC power adapter.

30 Chapter 4 Power management

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Contents HP Notebook Product notice Safety warning notice Iv Safety warning notice Table of contents VGA Hdmi External cards and devices Security Computer Setup Bios and Advanced System Diagnostics Appendix C Electrostatic discharge Index Finding more information about your new computer IntroductionSelect Start All Programs HP HP Documentation Creating a wireless connection Identifying wireless and network status iconsNetworking select models only WindowsWindows Vista Turning wireless devices on or off Using HP Connection Manager select models onlyUsing operating system controls Select Start All Programs HP HP Connection ManagerConnecting to an existing Wlan Using a WlanSelect Start Connect to Setting up a new Wlan Protecting your WlanUsing HP Mobile Broadband select models only Roaming to another networkInserting a SIM Removing a SIMUsing GPS select models only Using Bluetooth wireless devicesConnecting to a wired network Bluetooth and Internet Connection Sharing ICSConnecting a modem cable Connecting a country- or region-specific modem cable adapter Selecting a location settingAdding new locations when traveling Windows Select Start Devices and PrintersConnecting to a local area network LAN select models only Page Multimedia Using the media activity controlsAudio Adjusting the volume Select Start All Programs Accessories Sound RecorderChecking audio functions on the computer Select Start Control Panel Hardware and Sound SoundWebcam select models only VideoPage Hdmi Configuring audio for Hdmi Intel Wireless Display select models onlyShutting down the computer Power managementWindows 7-SelectStart Shut down Using power-saving states Setting power optionsInitiating and exiting Sleep Using the power meter Using power plansViewing the current power plan Initiating and exiting HibernationSelecting a different power plan Customizing power plansSetting password protection on wakeup Using HP Power Assistant select models only Using battery powerFinding additional battery information Select Start All Programs HP HP Power AssistantUsing Battery Check Displaying the remaining battery chargeMaximizing battery discharge time Managing low battery levelsConserving battery power Resolving a low battery levelUsing external AC power Storing a batteryDisposing of a used battery Replacing the batteryTesting an AC adapter Switchable graphics/dual graphics select models only Using switchable graphics select models onlyUsing dual graphics select models only External cards and devices Using Media Card Reader cards select models onlyInserting a digital card Configuring an ExpressCard Using ExpressCards select models onlyRemoving a digital card Inserting an ExpressCard Using smart cards select models only Removing an ExpressCardInserting a smart card Using a USB deviceRemoving a smart card Connecting a USB device Using 1394 devices select models onlyRemoving a USB device Connecting a 1394 device Using an eSATA device select models onlyRemoving a 1394 device Connecting an eSATA device Removing an eSATA deviceUsing optional external devices Using a serial device select models onlyUsing optional external drives Using the expansion port select models only Using the docking connector select models only Drives Handling drivesUsing hard drives Using Disk DefragmenterUsing Disk Cleanup Improving hard drive performanceManaging power with a parked hard drive Using HP 3D DriveGuard select models onlyIdentifying HP 3D DriveGuard status Using optical drives select models only Identifying the installed optical driveUsing HP 3D DriveGuard software Inserting an optical discRemoving an optical disc Slot-loadWhen the disc tray opens normally Slot-load Using RAID select models only Sharing optical drivesSecurity Protecting the computerUsing passwords Setting passwords in Windows Password FunctionSetting passwords in Computer Setup Managing a Bios administrator passwordSetting a new Bios administrator password Changing a Bios administrator passwordEntering a Bios administrator password Managing a Computer Setup DriveLock passwordDeleting a Bios administrator password Setting a DriveLock password Changing a DriveLock password Entering a DriveLock passwordRemoving DriveLock protection Entering an Automatic DriveLock password Using Computer Setup Automatic DriveLockRemoving Automatic DriveLock protection Using firewall software Using antivirus softwareInstalling critical security updates Using HP ProtectTools Security Manager select models only Installing an optional security cableUsing the fingerprint reader select models only Locating the fingerprint readerMaintenance Cleaning your computerCleaning products Cleaning proceduresCleaning the TouchPad and keyboard Cleaning the sides and coverUpdating programs and drivers Using SoftPaq Download Manager Computer Setup Bios and Advanced System Diagnostics Using Computer SetupStarting Computer Setup Navigating and selecting in Computer SetupRestoring factory settings in Computer Setup Updating the Bios Determining the Bios versionDownloading a Bios update Select Start Help and Support MaintainUsing Advanced System Diagnostics Page MultiBoot About the boot device orderEnabling boot devices in Computer Setup Considering boot order changesChoosing MultiBoot preferences Setting a new boot order in Computer SetupSetting a MultiBoot Express prompt Dynamically choosing a boot device using the f9 promptEntering MultiBoot Express preferences Configuring and deploying a software image Using Client Management SolutionsComputer Management Managing and updating software HP Client Manager for Altiris select models onlyHP CCM Client Configuration Manager select models only HP SSM System Software ManagerUsing Intel Active Management Technology select models only Enabling the iAMT solutionUsing the MEBx setup utility menus Intel ME ConfigurationIAMT Configuration Change Intel ME PasswordTraveling with the computer Page Troubleshooting resources Electrostatic discharge Symbols/Numerics IndexKeys SIM