HP CQ41-213TU, CQ41-205TX, CQ41-204TX, CQ41-206TX, CQ41-207TX, CQ41-224TX Using external AC power

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Using external AC power

External AC power is supplied through one of the following devices:

WARNING! To reduce potential safety issues, use only the AC adapter provided with the computer, a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.

●Approved AC adapter

●Optional expansion product

Connect the computer to external AC power under any of the following conditions:

WARNING! Do not charge the computer battery while you are onboard aircraft.

●When you are charging or calibrating a battery

●When you are installing or modifying system software

●When you are writing information to a CD or DVD

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 battery 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. To increase display brightness, press the fn+f8 hotkey or reconnect the AC adapter.

60 Chapter 5 Power management

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Contents Page Product notice Safety warning notice Iv Safety warning notice Table of contents Pointing devices and keyboard Multimedia Drives External devices and external media cards 117 Features Identifying hardwareTop components ComponentsTouchPad Lights ComponentsFeatures Panel System and Security Power Options Buttons and speakersKeys Fn keyDisplay Front components Rear componentRight-side components Left-side components Bottom components Wireless antennas Additional hardware components Labels Wireless, local area network, and modem Using wireless devicesUsing the wireless controls Identifying wireless and network status iconsUsing the wireless button Using HP Wireless Assistant Using operating system controlsUsing a Wlan Setting up a WlanProtecting your Wlan Use a wireless transmitter with built-in securityUse wireless encryption Work behind a firewallConnecting to a Wlan Roaming to another networkUsing Bluetooth wireless devices select models only Bluetooth and Internet Connection Sharing ICSTroubleshooting wireless connection problems Cannot connect to a WlanNetwork icon is not displayed Cannot connect to a preferred networkCurrent network security codes are unavailable Cannot connect to the wireless router Wlan connection is very weakUsing the modem select models only Connecting a modem cableSelecting a location setting Connecting a country-specific modem cable adapterViewing the current location selection Adding new locations when traveling Select Start Devices and PrintersCheck for pulse or tone dialing Solving travel connection problemsCheck the telephone line type Set the modem to ignore dial tonesConnecting to a local area network Clear the check box for Wait for dial tone before dialingUsing the TouchPad Pointing devices and keyboardSetting TouchPad preferences Connecting an external mouseUsing keyboard hotkeys Function HotkeyDisplaying system information Opening Help and SupportOpening the Print Options window Switching the screen imageOpening a Web browser Decreasing screen brightness Initiating SleepInitiating QuickLock Increasing screen brightnessPlaying previous track or section of an audio CD or a DVD Playing, pausing or resuming an audio CD or a DVDStopping an audio CD or a DVD Playing next track or section of an audio CD or a DVDUsing keypads Num lk keySwitching key functions on the embedded numeric keypad Using the embedded numeric keypadUsing an optional external numeric keypad Enabling and disabling the embedded numeric keypadCleaning the TouchPad and keyboard Multimedia features MultimediaIdentifying your multimedia components Environmental NoticesAdjusting the volume Click Customize notification iconsUsing the media activity hotkeys Installing multimedia software from a disc Using DVD Play softwareUsing other preinstalled multimedia software Multimedia softwareAudio Connecting external audio devicesSelect Start All Programs Accessories Sound Recorder Checking your audio functionsConnecting an external monitor or projector VideoConnecting an Hdmi device Configuring audio for Hdmi Webcam select models only Webcam tipsAdjusting webcam properties Troubleshooting Computer does not detect the optical drive Disc does not play Select Advanced Settings Monitor tabDisc does not play automatically DVD movie stops, skips, or plays erratically DVD movie is not visible on an external displayRemove any discs from the optical drive Obtaining the latest HP device drivers Obtaining the latest Windows device driversUsing power-saving states Power managementSetting power options Initiating and exiting SleepUsing the battery meter Initiating and exiting HibernationViewing the current power plan Using power plansSetting password protection on wakeup Selecting a different power planUsing external AC power Connecting the AC adapter Testing an AC adapter Finding battery information in Help and Support Using battery powerUsing Battery Check Displaying the remaining battery charge Inserting or removing the batteryCharging a battery Managing low battery levels Maximizing battery discharge timeIdentifying low battery levels Resolving a low battery level Fully charge the battery Calibrating a batteryDisable Hibernation and Sleep Fully recharge the battery Discharge the batteryReenable Hibernation and Sleep Disposing of a used battery Conserving battery powerStoring a battery Replacing the batteryShutting down the computer Click Shut downDrives Handling drivesOptical drive Identifying the installed optical driveSelect Start Computer Using optical discs DVD±RW/RCD-RW discs Selecting the right discCD-R discs DVD±R discsLightScribe DVD+R discs Playing a CD, DVD, or BDBlu-ray Disc Changing DVD region settings Configuring AutoPlaySelect Start Default Programs Change AutoPlay settings Observing the copyright warning Select Start All Programs CyberLink DVD Suite Power2GoCopying a CD or DVD Creating burning a CD or DVD Removing an optical disc CD, DVD, or BD Removing the optical drive Using external drives Using Disk Cleanup Using Disk DefragmenterImproving hard drive performance Replacing the hard drive Page Page Tighten the hard drive cover screws Replacing the hard drive Connecting a USB device Using a USB deviceExternal devices and external media cards Removing a USB device Using Digital Media Slot cards Inserting a digital cardRemoving a digital card Memory modules Page Page Page Security Protecting the computerUsing passwords Setting passwords in WindowsSetting passwords in Setup Utility Administrator passwordPower-on password Entering an administrator passwordUsing antivirus software Using firewall softwareInstalling critical security updates Installing an optional security cableSetup Utility Bios Starting Setup UtilityChanging the language of Setup Utility Using Setup UtilityNavigating and selecting in Setup Utility Restoring default settings in Setup Utility Main menu Setup Utility menusExiting Setup Utility Security menuSystem Configuration menu Diagnostics menuSoftware updates Updating the Bios Determining the Bios versionDownloading a Bios update Updating programs and drivers Backup and recovery Creating recovery discs Backing up your information Using Windows Backup and Restore Select Start All Programs Maintenance Backup and RestoreCreate a system restore point Using system restore pointsWhen to create restore points Restore to a previous date and timeSelect Start All Programs Recovery Manager Recovery Manager Performing a recoveryRecovering from the recovery discs Click System Recovery in the Recovery Manager windowSymbols/Numerics IndexJacks Ssid Page Wlan label 14 Wlan module 11 writable media Index

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