HP B5R45UA, dv7-7135us 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.

88 Chapter 13 Troubleshooting and support

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Contents User Guide Product notice Software termsSafety warning notice Iv Safety warning notice Table of contents Using Sleep or Hibernation Managing and sharing information Securing your computer and information Input power Operating environment Page Starting right Best practicesFun things to do Resource Contents More HP resourcesFront Getting to know your computerFinding your hardware and software information Component DescriptionUsing Sleep or Hibernation on Right sideGetting to know your computer Left side Rear Display Communication and Chat CyberLink YouCamTop TouchPadLights Sleep or Hibernation onOr see Managing power on Buttons, speakers, and fingerprint readerSound Beats Audio Control Panel KeysBy selecting Start Control Panel Hardware Num lock key Bottom Labels ComponentUsing the wireless controls Connecting to a networkConnecting to a wireless network Using operating system controls Using the wireless buttonUsing HP Connection Manager select models only Using a Wlan Using an Internet service providerProtecting your Wlan Setting up a WlanConfiguring a wireless router Using Bluetooth wireless devices select models only Connecting to a WlanConnecting to a local area network LAN Enjoying entertainment features Multimedia FeaturesUsing the webcam Using audioConnecting a microphone Connecting speakersConnecting headphones Using Beats AudioChecking the sound Using videoConnecting a VGA monitor or projector IconDefinitionConnecting an Hdmi TV or monitor Configuring audio settings with Hdmi TV Using Intel Wireless Display select models only Managing your audio and video filesUsing the keyboard and pointing devices Using the action keys Using the keyboardUsing ALT GR key combinations Icon Key DescriptionSelect Start Control Panel Hardware and Sound Beats Using the hot keysFunction Hot key Description Audio Control PanelUsing the keypad Using the integrated numeric keypadUsing the TouchPad Turning the TouchPad off or onNavigating SelectingUsing TouchPad gestures Scrolling Pinching/ZoomingRotating FlickingManaging power Using Sleep or Hibernation Initiating and exiting SleepSetting password protection on wakeup Initiating and exiting HibernationUsing 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 Disposing of a user-replaceable batteryRunning on external power Replacing a user-replaceable batteryUsing HP CoolSense select models only Shutting down the computer Select Start Shut downManaging and sharing information Using a USB deviceConnecting a USB device Type DescriptionConnecting a powered USB device Removing a USB deviceInserting and removing digital storage cards Using optical drives Inserting an optical disc Removing an optical discSharing drives on the network Handling drives Maintaining your computerImproving performance Replacing a hard drive Page Using Disk Cleanup Using HP 3D DriveGuardUsing Disk Defragmenter Adding or replacing memory modules 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 Computer risk Security featureSecuring your computer and information Password Function Using passwordsSetting Windows passwords Using the fingerprint reader Setting Setup Utility Bios passwordsUsing your registered fingerprint to log on to Windows Using Internet security softwareUsing HP SimplePass Registering fingerprintsUsing firewall software Installing software updatesUsing antivirus software Installing Windows security updatesBacking 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 Determining the Bios versionDownloading a Bios update Select Start Help and Support MaintainUsing System Diagnostics Creating recovery media to recover the original system Backing up, restoring, and recoveringCreating backups What you need to knowCreating system restore points Creating a system restore pointTips for a successful backup Backing up system and personal informationCreating a backup using Windows Backup and Restore Recovering the original system using HP Recovery Manager Restore and recoveryRestoring to a previous system restore point Restoring specific files using Windows Backup and RestoreRecovering using HP Recovery partition select models only Recovering using the recovery mediaChanging the computer boot order Input power Rating SpecificationsInput power Operating 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 Cannot connect to the wireless router Wlan connection is very weakNetwork status icon is not displayed Audio problemsPower management problems Resolving a low battery level Troubleshooting an AC adapterContacting customer support Electrostatic Discharge Bios IndexHdmi