HP 20-k121us Mobile, 20-k127cl Mobile, 20-k014us Mobile manual Input power Operating specifications

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	Cannot connect to a WLAN	46
	Cannot connect to a preferred network	46
	Current network security codes are unavailable	47
	Cannot connect to the wireless router	47
	Network status icon is not displayed	48
	Power problems	48
	Computer will not turn on or start	48
	Hard drive error	48
	Computer is not responding	49
	Computer shuts down unexpectedly	49
	Display problems	49
	The display is blank	49
	Images on the screen are too large or too small, or the images are fuzzy	49
	Keyboard and mouse problems	49
	Audio problems	51
	No sound is produced	51
	Software problems	52
12	Specifications	53
	Input power	53
	Operating specifications	53
13	Electrostatic Discharge	54
Index		55

viii

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Contents User Guide Product notice Safety warning notice Iv Safety warning notice Table of contents Performing routine maintenance Wireless connection problems Vii Input power Operating specifications Fun things to do Starting rightBest practices Resource Contents More HP resourcesMore HP resources Getting to know your computer Finding your hardware and software informationFront Locating hardwareRight side Right sideEnvironmental Notices Left side Back TopIdentifying the labels BottomLabels Connecting to a network Connecting to a wireless networkUsing the wireless controls Using an Internet service providerProtecting your Wlan Setting up a WlanConfiguring a wireless router Connecting to a Wlan Connecting to a wired network Connecting to a local area network LANEnjoying entertainment features Volume controlUsing the webcam Using audioUsing video Connecting headphonesUsing Beats Audio Accessing Beats AudioOne-finger slide Navigating using the keyboard and pointing devicesUsing touch screen gestures Tapping ScrollingEdge swipes Pinching/stretchingRotating select models only Right-edge swipe Left-edge swipeTop-edge swipe and bottom-edge swipe Using the keyboard Fn keyUsing the action keys Icon Key DescriptionUsing Microsoft Windows 8 shortcut keys Using the integrated numeric keypadNum lock key Managing power Initiating Sleep and HibernationIntel Rapid Start Technology select models only Manually initiating and exiting SleepManually initiating and exiting Hibernation Setting password protection on wakeupHP CoolSense select models only Shutting down turning off the computer Using a USB device Managing and sharing informationConnecting a USB device Removing a USB deviceInserting and removing a memory card Performing routine maintenance Using Disk CleanupUsing Disk Defragmenter Maintaining peak performanceCleaning procedures Cleaning your computerCleaning products Using security measures Setting Windows passwordsSetting Setup Utility Bios passwords Using Internet security softwareInstalling software updates Installing Windows updatesUpdating software Determining the Bios version Starting Setup Utility BiosUpdating the Bios Using HP PC Hardware Diagnostics Uefi Downloading a Bios updateDownloading HP PC Hardware Diagnostics Uefi to a USB device Diagnostic section, click HP Uefi Support EnvironmentBacking up, restoring, and recovering Creating recovery media and backupsCreating HP Recovery media Restore and recovery Using Windows Refresh for quick and easy recovery Remove everything and reinstall WindowsWhat you need to know Recovering using HP Recovery ManagerUsing the HP Recovery partition select models only Changing the computer boot order Removing the HP Recovery partitionUsing HP Recovery media to recover Page Troubleshooting Wireless connection problemsCannot connect to a Wlan Cannot connect to a preferred networkCannot connect to the wireless router Current network security codes are unavailablePower problems Hard drive errorNetwork status icon is not displayed Computer will not turn on or startDisplay problems Keyboard and mouse problemsComputer is not responding Computer shuts down unexpectedlyPage Audio problems No sound is producedSoftware problems Operating specifications SpecificationsInput power Electrostatic Discharge Bios Index

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