HP LJ527UT, WX557AV Switching between graphics modes select models only, Testing an AC adapter

Page 42

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.

Switching between graphics modes (select models only)

Select computers are equipped with switchable graphics and have two modes for processing graphics. When you switch from AC power to battery power, the computer can switch from using the high-performance mode to using the power-saving mode to conserve battery life. Similarly, when you switch from battery power to AC power, the computer can switch back to the high-performance mode.

NOTE: In some instances, in order to optimize performance of the computer, the system does not allow you to switch modes, or it may prompt you to switch. It may also be necessary to close all programs before switching.

NOTE: HDMI (select models only) only works in the high-performance mode. If you use the power- saving mode, you can not use HDMI.

When you switch between AC and battery power, you are notified that the computer is about to switch graphics modes. If you prefer, you can choose to continue using the same graphics mode. While the computer switches modes, the screen goes blank for a few seconds. When the switch is complete, a notification appears in the notification area, and the screen image reappears.

NOTE: When select computer models are in slate mode, the screen orientation is reset when you switch between graphics modes.

32 Chapter 4 Power management

Image 42

Contents HP Notebook Product notice Safety warning notice Iv Safety warning notice Table of contents VGA Hdmi External cards and devices Cleaning your computer Cleaning products Viii Computer Setup Bios and System Diagnostics Page Introduction Finding more information about your new computerNetworking select models only Creating a wireless connectionIdentifying wireless and network status icons WindowsWindows Vista Using operating system controls Turning wireless devices on or offUsing HP Connection Manager select models only Click Start All Programs HP HP Connection ManagerUsing a Wlan Connecting to an existing WlanSelect Start Connect to Setting up a new Wlan Protecting your WlanRoaming to another network Using HP Mobile Broadband select models only Inserting a SIMBluetooth and Internet Connection Sharing ICS Using GPS select models onlyUsing Bluetooth wireless devices Removing a SIMConnecting to a wired network Using a modem select models onlyConnecting a modem cable Page Connecting a country- or region-specific modem cable adapter Selecting a location settingAdding new locations when traveling Windows Select Start Device and PrintersConnecting to a local area network LAN select models only Page Using the media activity controls MultimediaAudio Checking audio functions on the computer Adjusting the volumeSelect Start All Programs Accessories Sound Recorder Select Start Control Panel Hardware and Sound SoundSelect Start All Programs Accessories Sound Recorder Webcam select models only Video VGAConfiguring audio for Hdmi HdmiIntel Wireless Display select models only Power management Shutting down the computerWindows 7-SelectStart Shut down Initiating and exiting Sleep Setting power optionsUsing power-saving states Initiating and exiting HibernationViewing the current power plan Using the power meterUsing power plans Selecting a different power planSetting password protection on wakeup Customizing power plansClick Require a password recommended Click Save changes Finding additional battery information Using Power Assistant select models onlyUsing battery power Select Start All Programs HP HP Power AssistantMaximizing battery discharge time Using Battery CheckDisplaying the remaining battery charge Managing low battery levelsConserving battery power Resolving a low battery levelDisposing of a used battery Using external AC powerStoring a battery Replacing the batteryPage Switching between graphics modes select models only Testing an AC adapterUsing Media Card Reader cards select models only External cards and devicesInserting a digital card Using PC Cards select models only Removing a digital cardConfiguring a PC Card Inserting a PC Card Using ExpressCards select models only Configuring an ExpressCardRemoving a PC Card Inserting an ExpressCard Using smart cards select models only Removing an ExpressCardUsing a USB device Inserting a smart cardRemoving a smart card Using 1394 devices select models only Connecting a USB deviceRemoving a USB device Using an eSATA device select models only Connecting a 1394 deviceRemoving a 1394 device Connecting an eSATA device Removing an eSATA deviceUsing a serial device select models only Using optional external devicesUsing optional external drives Using the expansion port select models only Using the docking connector select models onlyExternal cards and devices Drives Handling drivesUsing Disk Cleanup Using hard drivesUsing Disk Defragmenter Improving hard drive performanceUsing HP 3D DriveGuard select models only Managing power with a parked hard driveIdentifying HP 3D DriveGuard status Using HP 3D DriveGuard software Using optical drives select models onlyIdentifying the installed optical drive 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 WindowsSetting a new Bios administrator password Setting passwords in Computer SetupManaging a Bios administrator password Changing a Bios administrator passwordManaging a Computer Setup DriveLock password Entering a Bios administrator passwordDeleting a Bios administrator password Setting a DriveLock password Entering a DriveLock password Changing a DriveLock passwordRemoving DriveLock protection Using Computer Setup Auto DriveLock Entering an Automatic DriveLock passwordRemoving Automatic DriveLock protection Page Using antivirus software Using firewall software Installing 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 readerMaintenance Cleaning procedures Cleaning your computerCleaning products Cleaning the displayCleaning the TouchPad and keyboard Cleaning a tablet PC pen and pen holderUpdating programs and drivers Using SoftPaq Download Manager Starting Computer Setup Computer Setup Bios and System DiagnosticsUsing Computer Setup Navigating and selecting in Computer SetupRestoring factory settings in Computer Setup Downloading a Bios update Updating the BiosDetermining the Bios version Select Start Help and Support MaintainUsing System Diagnostics MultiBoot About the boot device orderEnabling boot devices in Computer Setup Considering boot order changes Choosing MultiBoot preferences Setting a new boot order in Computer SetupDynamically choosing a boot device using the F9 prompt Setting a MultiBoot Express prompt Entering MultiBoot Express preferencesUsing Client Management Solutions Configuring and deploying a software imageManagement Managing and updating software HP Client Manager for Altiris select models onlyPage HP CCM Client Configuration Manager select models only HP SSM System Software ManagerUsing Intel Active Management Technology select models only Intel ME Configuration Enabling the iAMT solutionUsing the MEBx setup utility menus IAMT ConfigurationChange Intel ME Password Traveling with the computer Page Troubleshooting resources Electrostatic Discharge Symbols/Numerics IndexKeys SIM