HP CQ36-104TX, CQ35-304TU, CQ36-108TX, CQ36-109TX manual Using battery power, Testing an AC adapter

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3.Plug the other end of the power cord into an AC outlet (3).

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 will not turn on.

●The display does not turn on.

●The power light is off.

To test the AC adapter:

1.Remove the battery from the computer.

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

3.Turn on the computer.

If the power light turns on, the AC adapter is working properly.

Contact technical support for information on obtaining a replacement AC power adapter. Select Start > Help and Support > Get assistance

Using battery power

When a charged battery is in the computer and the computer is not plugged into external power, the computer runs on battery power. When the computer is plugged into external AC power, the computer runs on AC power.

If the computer contains a charged battery and is running on external AC power supplied through the AC adapter, the computer switches to battery power if the AC adapter is disconnected from the computer.

NOTE: The display brightness is decreased to save battery life when you disconnect AC power. To increase display brightness, use the fn+f8 hotkey or reconnect the AC adapter.

58 Chapter 5 Power management

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Contents User Guide Product notice Safety warning notice Iv Safety warning notice Table of contents Pointing devices and keyboard Power management Drives External media cards 120 TouchPad Identifying the hardwareTop components Lights Buttons and fingerprint reader select models only Panel System and Security Power Options Front components KeysRight-side components Left-side components Bottom components Wireless antennas Display componentsAdditional hardware components Identifying the labels Page Wireless and local area network Using wireless devices Identifying wireless and network status iconsUsing Wireless Assistant software select models only Using the wireless controlsUsing the wireless button Using operating system controls Protecting your Wlan Using a WlanSetting up a Wlan Connecting to a Wlan Use a wireless transmitter with built-in securityRoaming to another network Using HP Mobile Broadband select models only Inserting a SIMPage Page Removing a SIM Page Using Bluetooth wireless devices select models only Bluetooth and Internet Connection Sharing ICSTroubleshooting wireless connection problems Cannot connect to a WlanCurrent Wlan network security codes are unavailable Cannot connect to a preferred Wlan networkNetwork icon is not displayed Cannot connect to the wireless router Wlan connection is very weakConnecting to a local area network LAN Using pointing devices Setting pointing device preferencesUsing the TouchPad Pointing devices and keyboardRotating select models only Pinching select models onlyUsing hotkeys Function Hotkey Description Fn+f5 Using keypads Fn+f9Using the embedded numeric keypad Enabling and disabling the embedded numeric keypadSwitching key functions on the embedded numeric keypad Cleaning the TouchPad and keyboardUsing an optional external numeric keypad Identifying your multimedia components Multimedia featuresMultimedia Multimedia features Adjusting the volume Using the media activity functions Using the media activity hotkeysMultimedia software Using multimedia softwareInstalling multimedia software from a disc Checking your audio functions Connecting external audio devicesAudio Page Video Connecting an external monitor or projectorConnecting an Hdmi device Configuring audio for Hdmi select models only Adjusting webcam properties WebcamTroubleshooting Disc tray does not open for removal of a discComputer does not detect the optical drive Disc does not play Movie is not visible on an external display Disc does not play automaticallyMovie stops, skips, or plays erratically Obtaining the latest HP device drivers Obtaining the latest Windows device drivers Power management Setting power optionsUsing power-saving states Initiating and exiting SleepUsing the battery meter Initiating and exiting HibernationUsing power plans Setting password protection on wakeupViewing the current power plan Selecting a different power planUsing external AC power Connecting the AC adapterUsing battery power Testing an AC adapterFinding battery information in Help and Support Using Battery CheckDisplaying the remaining battery charge Identifying batteriesInserting or removing the battery Charging a battery Maximizing battery discharge time Managing low battery levelsIdentifying low battery levels Resolving a low battery levelCalibrating a battery Fully charge the batteryDisable Hibernation and Sleep Discharge the batteryReenable Hibernation and Sleep Conserving battery powerFully recharge the battery Storing a battery Disposing of a used batteryReplacing the battery Shutting down the computerClick Shut down Handling drives Identifying installed drivesDrives Using an optical drive Identifying the installed optical driveUsing optical discs Selecting the right disc CDs, DVDs, and BDsCD-R discs CD-RW discsDVD±R discs DVD±RW discsConfiguring AutoPlay Playing a CD, DVD, or BDChanging DVD region settings Observing the copyright warningCopying a CD or DVD Creating burning a CD or DVDRemoving an optical disc CD, DVD, or BD Using Disk DefragmenterImproving hard drive performance Identifying HP ProtectSmart Hard Drive Protection status Using HP ProtectSmart Hard Drive ProtectionUsing Disk Cleanup Using HP ProtectSmart Hard Drive Protection software Replacing the hard drivePage Page Close the cover Tighten the 3 hard drive cover screws Drives Using a USB device Connecting a USB deviceExternal devices Removing a USB devicePage Removing an eSATA device Using an eSATA deviceConnecting an eSATA device External media cards Using Digital Media Slot cards Inserting a digital cardRemoving a digital card Inserting an ExpressCard Using ExpressCardsConfiguring an ExpressCard Removing an ExpressCard Using ExpressCards Memory modules Adding or replacing memory modules Page Page Upgrading a memory module in the primary memory module slot Page Page Security Computer risk Security feature Protecting the computerUsing passwords Setting passwords in WindowsSetting passwords in Setup Utility Administrator passwordPower-on password Managing an administrator passwordManaging a power-on password Using antivirus software Using firewall software Installing critical security updates Installing an optional security cable Using the fingerprint reader select models onlyLocating the fingerprint reader Registering fingerprintsUsing your registered fingerprint to log on to Windows Setup Utility Starting Setup Utility Navigating and selecting in Setup Utility Using Setup UtilityChanging the language of Setup Utility Displaying system information Restoring default settings in Setup UtilityExiting Setup Utility Page Setup Utility Menus System Configuration menuMain menu Security menuDiagnostics menu Primary Hard Disk Self TestSoftware updates Downloading a Bios update Updating the BiosDetermining the Bios version Page Updating programs and drivers Symbols/Numerics IndexDVD SIM SIM

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