HP : LY849UA, : LW883AW, : G4 1107NR Using HP CoolSense select models only, Testing an AC adapter

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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, 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 HP Customer Support for information on obtaining a replacement AC power adapter.

Using HP CoolSense (select models only)

HP CoolSense gives you more control over your computer's thermal settings through the use of predefined modes that emphasize computer performance, temperature, and fan speed and noise.

●On—Configures the thermal settings to avoid temperature increases and make the computer feel cooler to the touch.

●Off—With CoolSense turned off, your computer will operate at peak performance, but this setting may result in higher temperature than in On mode.

●Auto (select models only)—Automatically detects whether the computer is stationary or mobile, and optimizes the thermal settings to match your usage environment. When the computer is stationary, HP CoolSense prioritizes performance and is set to Off mode. When the computer is mobile, HP CoolSense prioritizes temperature and is set to On mode.

To change the cooling preferences, follow these steps:

▲Select Start > Control Panel > Hardware and Sound > HP CoolSense.

26 Chapter 4 Power management

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Contents HP Notebook Product notice Safety warning notice Iv Safety warning notice Table of contents VGA External cards and devices Security Page Page Introduction Finding more information about your new computerCreating a wireless connection Identifying wireless and network status iconsNetworking select models only Turning wireless devices on or off Using HP Connection Manager select models onlyUsing a Wlan Using operating system controlsConnecting to an existing Wlan Setting up a new WlanProtecting your Wlan Using HP Mobile Broadband select models only Roaming to another networkInserting a SIM Using GPS select models only Removing a SIMUsing Bluetooth wireless devices Connecting to a wired networkBluetooth and Internet Connection Sharing ICS Using a modem select models onlyConnecting a modem cable Connecting a country- or region-specific modem cable adapterSelecting a location setting Viewing the current location selectionConnecting to a local area network LAN select models only Select Start Devices and PrintersPage Using the media activity controls MultimediaAudio Adjusting the volume Webcam select models onlyChecking audio functions on the computer Video DisplayPortHdmi Using CyberLink PowerDVD select models only Intel Wireless Display select models onlyConfiguring audio for Hdmi Power management Shutting down the computerSetting power options Using power-saving statesInitiating and exiting Sleep Initiating and exiting HibernationUsing the power meter Using power plansViewing the current power plan Selecting a different power planUsing HP Power Manager select models only Setting password protection on wakeupCustomizing power plans Using battery power Finding battery informationUsing Battery Check Displaying the remaining battery charge Maximizing battery discharge timeManaging low battery levels Identifying low battery levelsConserving battery power Storing a batteryResolving a low battery level Using external AC power Disposing of a used batteryReplacing the battery Using HP CoolSense select models only Testing an AC adapterUsing Digital Media Slot cards select models only External cards and devicesInserting a digital card Using ExpressCards select models only Configuring an ExpressCardRemoving a digital card Inserting an ExpressCardRemoving an ExpressCard Using smart cards select models only Inserting a smart cardUsing a USB device Connecting a USB deviceRemoving a smart card Using 1394 devices select models only Connecting a 1394 deviceRemoving a USB device Using an eSATA device select models only Connecting an eSATA deviceRemoving a 1394 device Using optional external devices Using optional external drivesUsing the expansion port select models only Removing an eSATA deviceUsing optional external devices Drives Handling drivesUsing hard drives Using Disk DefragmenterUsing Disk Cleanup Improving hard drive performanceManaging power with a parked hard drive Identifying HP ProtectSmart Hard Drive Protection statusUsing optical drives select models only Identifying the installed optical driveUsing HP ProtectSmart Hard Drive Protection software Inserting an optical discRemoving an optical disc Slot loadWhen the disc tray opens normally Slot load Using RAID select models only Sharing optical drivesUsing passwords SecurityProtecting the computer Setting passwords in Windows Setting passwords in Setup Utility BiosManaging an administrator password Entering an administrator passwordUsing antivirus software Using firewall softwareManaging a power-on password Entering a power-on passwordInstalling critical security updates Installing an optional security cableUsing the fingerprint reader select models only Locating the fingerprint readerMaintenance Cleaning your computerCleaning the display Cleaning the TouchPad and keyboardUsing SoftPaq Download Manager Setup Utility Bios and System Diagnostics Using Setup Utility BiosStarting Setup Utility Bios Changing the language of Setup Utility BiosNavigating and selecting in Setup Utility Bios Restoring factory settings in Setup Utility BiosDisplaying system information Exiting Setup Utility Bios Updating the BiosDetermining the Bios version Downloading a Bios update Select Start Help and Support MaintainUsing System Diagnostics Traveling with the computer Page Troubleshooting resources Electrostatic Discharge Symbols/Numerics IndexPasswords