HP B5A04UAR#ABA manual Resolving a low battery level, Troubleshooting an AC adapter

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Resolving a low battery level

Resolving a low battery level when external power is available

Connect an AC adapter.

Connect an optional docking or expansion device.

Connect an optional power adapter purchased as an accessory from HP.

Resolving a low battery level when no power source is available

Initiate Hibernation.

Save your work and shut down the computer.

Resolving a low battery level when the computer cannot exit Hibernation

When the computer lacks sufficient power to exit Hibernation, follow these steps:

1.Replace the discharged user-replaceable battery with a charged battery, or connect the AC adapter to the computer and to external power.

2.Exit Hibernation by pressing the power button.

Troubleshooting 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, check the connection from the AC adapter to the computer and the connection from the AC adapter to the AC outlet to make sure the connections are secure.

If the connections are secure and the power lights remain off, the AC adapter is not functioning and should be replaced.

Contact customer support for information about obtaining a replacement AC power adapter.

Troubleshooting 85

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Contents User Guide Product notice Safety warning notice Iv Safety warning notice Table of contents Enjoying entertainment features Locating your security software Using passwords Vii Using Setup Utility Bios and System Diagnostics Input power Operating environment Page Best practices Starting rightFun things to do More HP resources Resource ContentsRight side Getting to know your computerFinding your hardware and software information See Using HP 3D DriveGuard select models only Left side Computer speakers are disabled Communication and Chat CyberLink YouCam DisplayTouchPad TopLights Buttons and speakers Fn key KeysBottom Labels Connecting to a network Using HP Connection Manager Connecting to a wireless networkUsing the wireless controls Using the wireless buttonUsing an Internet service provider Using a WlanUsing operating system controls Protecting your Wlan Setting up a WlanConfiguring a wireless router Connecting to a Wlan Using Bluetooth wireless devices select models onlyConnecting to a local area network LAN Connecting to a wired networkMultimedia Features Enjoying entertainment featuresEnjoying entertainment features Using audio Using the webcamConnecting a VGA monitor or projector Using videoConnecting an Hdmi TV or monitor Managing your photo, audio, and video files Configuring audio settings with Hdmi TVUsing the keyboard and pointing devices Using the action keys Using the keyboardUsing ALT GR key combinations Function Hot key Description Using the hot keysUsing the integrated numeric keypad Using the keypadTurning the TouchPad off or on Using the TouchPadSelecting NavigatingUsing TouchPad gestures Pinching/Zooming ScrollingRotating Managing power Initiating and exiting Hibernation Using Sleep or HibernationInitiating and exiting Sleep Setting password protection on wakeup Using the power meter Selecting a power plan Finding battery information Running on battery powerRemoving a user-replaceable battery Storing a user-replaceable battery Conserving battery powerIdentifying low battery levels Replacing a user-replaceable battery Disposing of a user-replaceable batteryRunning on external power Shutting down the computer HP CoolSenseManaging and sharing information Using a USB deviceConnecting a USB device Removing a USB device Connecting a powered USB deviceInserting and removing a digital storage card Using optical drives Removing an optical disc Inserting an optical discSharing drives on the network Handling drives Maintaining your computerImproving performance Replacing a hard drive Page Using Disk Cleanup Using HP 3D DriveGuard select models onlyUsing Disk Defragmenter Adding or replacing memory modules Page Page Page Updating programs and drivers Cleaning the TouchPad and keyboard Cleaning your computerCleaning the display, sides, and cover Traveling with or shipping your computer Locating your security software Securing your computer and informationSetting Windows passwords Using passwordsSetting Setup Utility Bios passwords Using Internet security softwareInstalling Windows security updates Installing software updatesUsing antivirus software Using firewall softwareBacking up your software applications and information Securing your wireless networkUsing an optional security cable lock Updating the Bios Using Setup Utility Bios and System DiagnosticsStarting Setup Utility Bios Downloading a Bios update Determining the Bios versionUsing System Diagnostics What you need to know Backing up, restoring, and recoveringCreating backups Creating recovery media to recover the original systemCreating a system restore point Creating system restore pointsBacking up system and personal information Tips for a successful backupCreating a backup using Windows Backup and Restore Restoring specific files using Windows Backup and Restore Restore and recoveryRestoring to a previous system restore point Recovering the original system using HP Recovery ManagerRecovering using the recovery media Recovering using HP Recovery partition select models onlyChanging the computer boot order Input power SpecificationsOperating environment Troubleshooting and support Wireless connection problems TroubleshootingDisc drive problems Current network security codes are unavailable Cannot connect to a WlanCannot connect to a preferred network Wlan connection is very weak Cannot connect to the wireless routerNetwork status icon is not displayed Audio problemsPower management problems Troubleshooting an AC adapter Resolving a low battery levelContacting customer support Electrostatic Discharge Index BiosWlan