Testing an AC adapter | HP XU103UT manual

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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HP XU103UT manual Testing an AC adapter

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 Windows Windows Vista Turning wireless devices on or off Using HP Connection Manager select models onlyUsing operating system controls Select Start All Programs HP HP Connection Manager Connecting to an existing Wlan Using a WlanSelect Start Connect to Setting up a new Wlan Protecting your Wlan Using HP Mobile Broadband select models only Roaming to another network Inserting a SIM Removing a SIM Using GPS select models only Using Bluetooth wireless devicesConnecting to a wired network Bluetooth and Internet Connection Sharing ICS Connecting a modem cable Connecting a country- or region-specific modem cable adapter Selecting a location setting Adding new locations when traveling Windows Select Start Devices and Printers Connecting 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 Sound Webcam select models only VideoPage Hdmi Configuring audio for Hdmi Intel Wireless Display select models only Shutting 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 Hibernation Selecting a different power plan Customizing power plans Setting password protection on wakeup Using HP Power Assistant select models only Using battery powerFinding additional battery information Select Start All Programs HP HP Power Assistant Using Battery Check Displaying the remaining battery chargeMaximizing battery discharge time Managing low battery levels Conserving battery power Resolving a low battery level Using external AC power Storing a batteryDisposing of a used battery Replacing the battery Testing an AC adapter Switchable graphics/dual graphics select models only Using switchable graphics select models only Using 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 ExpressCard Inserting 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 device Using 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 drives Using hard drives Using Disk DefragmenterUsing Disk Cleanup Improving hard drive performance Managing 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 disc Removing an optical disc Slot-load When the disc tray opens normally Slot-load Using RAID select models only Sharing optical drives Security Protecting the computer Using passwords Setting passwords in Windows Password Function Setting passwords in Computer Setup Managing a Bios administrator passwordSetting a new Bios administrator password Changing a Bios administrator password Entering 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 cable Using the fingerprint reader select models only Locating the fingerprint reader Maintenance Cleaning your computerCleaning products Cleaning procedures Cleaning 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 Setup Restoring factory settings in Computer Setup Updating the Bios Determining the Bios versionDownloading a Bios update Select Start Help and Support Maintain Using Advanced System Diagnostics Page 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 Setup Setting 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 only HP CCM Client Configuration Manager select models only HP SSM System Software Manager Using Intel Active Management Technology select models only Enabling the iAMT solutionUsing the MEBx setup utility menus Intel ME Configuration IAMT Configuration Change Intel ME Password Traveling with the computer Page Troubleshooting resources Electrostatic discharge Symbols/Numerics Index Keys SIM