HP LJ475UT manual Operating environment

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Operating environment

Factor	Metric	U.S.

Temperature

Operating (writing to optical disc)	5°C to 35°C	41°F to 95°F

Nonoperating	-20°C to 60°C	-4°F to 140°F

Relative humidity (noncondensing)

Operating	10% to 90%	10% to 90%

Nonoperating	5% to 95%	5% to 95%

Maximum altitude (unpressurized)

Operating	-15 m to 3,048 m	-50 ft to 10,000 ft

Nonoperating	-15 m to 12,192 m	-50 ft to 40,000 ft

Operating environment 85

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Contents HP Notebook User Guide Product notice Safety warning notice Iv Safety warning notice Table of contents VGA Drives Performing a system recovery Backing up your information Cleaning products Page Finding information WelcomeResources For information about Finding informationTouchPad Getting to know your computerTop Lights Buttons Control Center System Power ManagementFn key KeysEsc key Front Right Left Left Display Bottom Networking Using an Internet service provider ISP Turning wireless devices on and off Identifying wireless and network status iconsCreating a wireless connection Using a WlanSetting up a new Wlan Connecting to an existing WlanRoaming to another network Protecting your WlanConnecting a modem cable Using Bluetooth wireless devices select models onlyConnecting to a wired network Using a modem select models onlyConnecting a country- or region-specific modem cable adapter Connecting to a local area network LAN select models only Identifying the hotkeys Using the keyboardKeyboard and pointing devices Using the keyboard Using the embedded numeric keypad Using keypadsTurning the embedded numeric keypad on and off Using the integrated numeric keypadTurning the TouchPad off and on Using the TouchPadUsing an optional external numeric keypad Selecting Using TouchPad gesturesNavigating Pinching/Zooming Setting pointing device preferencesScrolling Multimedia Using the media activity keysUsing the audio features Adjusting the volume Checking your audio functions Using the Webcam select models onlyVGA Using video devicesConnecting an Hdmi device select models only Configuring audio for Hdmi select models only Shutting down the computer Power managementInitiating and exiting Hibernation Setting power optionsUsing power-saving states Initiating and exiting SuspendViewing the current power management settings Using battery powerUsing the Power icon Using power managementDisplaying the remaining battery charge Inserting or removing the battery Charging a battery Identifying low battery levels Maximizing battery lifeManaging low battery levels Resolving a low battery level Conserving battery powerStoring a battery Replacing the battery Using external AC powerDisposing of a used battery Testing an AC adapter Handling drives DrivesRemoving the hard drive Replacing or upgrading the hard driveLift the hard drive 3 out of the hard drive bay Drives Installing a hard drive Page Removing an optical disc Using optical drives select models onlyIdentifying the installed optical drive Inserting an optical discWhen the disc tray opens normally Page Inserting a digital card Using Digital Media Slot cards select models onlyExternal cards and devices Removing a digital card Configuring an ExpressCard Using ExpressCards select models onlyInserting an ExpressCard Removing an ExpressCard Using a USB deviceRemoving a USB device Connecting a USB deviceUsing optional external drives Using optional external devicesMemory modules Page Page Page Page Protecting the computer SecuritySetting passwords in Computer Setup Using passwordsSetting passwords in the operating system Managing a power-on password Managing an administrator passwordEntering an administrator password Entering a power-on password Using firewall softwareInstalling an optional security cable Performing a system recovery Backing up your information Backup and RecoveryPerforming a system recovery Backing up your information Navigating and selecting in Computer Setup Computer SetupStarting Computer Setup Using Computer SetupRestoring factory settings in Computer Setup Updating the BiosDownloading a Bios update Determining the Bios versionComputer screen is blank Troubleshooting and supportTroubleshooting Computer is unable to start upAn external device is not working Software is functioning abnormallyComputer is on but not responding Computer is unusually warmOptical disc tray does not open for removal of a CD or DVD Wireless network connection is not workingMovie is not visible on an external display Computer does not detect the optical driveDisc does not play Contacting customer support Component LabelsCleaning products Cleaning your computerInput power SpecificationsOperating environment Electrostatic discharge USB IndexJacks