HP ZBook 14 Mobile manual Computer screen is blank, Software is functioning abnormally

Page 100

The computer screen is blank

If the screen is blank but you have not turned off the computer, one or more of these settings may be the cause:

●The computer may be in the Sleep state. To exit Sleep, briefly press the power button. Sleep is an energy-saving feature that turns off the display. Sleep can be initiated by the system while the computer is on but is not in use, or when the computer has reached a low battery level. To change these and other power settings, right-click the Battery icon on the Windows desktop in the notification area, at the far right of the taskbar, and then click Preferences.

●The computer may not be set to display the image on the computer screen. To transfer the image to the computer screen, press fn+f4. On most models, when an optional external display, such as a monitor, is connected to the computer, the image can be displayed on the computer screen or the external display, or on both devices simultaneously. When you press fn+f4 repeatedly, the image alternates among the computer display, one or more external displays, and simultaneous display on all devices.

Software is functioning abnormally

If the software is unresponsive or responds abnormally, restart the computer by pointing to the right side of the screen. When the charms display, click Settings. Click the Power icon, and then click Shut down. If you cannot restart the computer using this procedure, see the next section, The computer is on but not responding on page 90.

The computer is on but not responding

If the computer is turned on but is not responding to software or keyboard commands, try the following emergency shutdown procedures, in the sequence provided, until shutdown occurs:

CAUTION: Emergency shutdown procedures result in the loss of unsaved information.

●Press and hold the power button for at least 5 seconds.

●Disconnect the computer from external power and remove the battery.

The computer is unusually warm

It is normal for the computer to feel warm to the touch while it is in use. But if the computer feels unusually warm, it may be overheating because a vent is blocked.

If you suspect that the computer is overheating, allow the computer to cool to room temperature. Be sure to keep all vents free from obstructions while you are using the computer.

WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The computer and the AC adapter comply with the user-accessible surface temperature limits defined by the International Standard for Safety of Information Technology Equipment (IEC 60950).

NOTE: The fan in the computer starts up automatically to cool internal components and prevent overheating. It is normal for the internal fan to cycle on and off during operation.

90 Appendix B Troubleshooting

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Contents User Guide Product notice Safety warning notice Iv Safety warning notice Table of contents VGA External cards and devices Adding or replacing memory modules Viii Contacting support Labels Input power Operating environment Welcome Finding information Resources For information aboutThen select Warranty and services Top Getting to know your computerTouchPad Lights Buttons and fingerprint reader select models only Keys Fn keyFront Regulatory, Safety, and Environmental Notices . To access RightLeft Display Select the HP Support Assistant appBottom Computer by the governmental agency SIM slot select models only Connecting to a network Connecting to a wireless networkUsing the wireless controls Using the wireless buttonUsing operating system controls Using a WlanUsing an Internet service provider Configuring a wireless router Setting up a WlanProtecting your Wlan Using HP Mobile Broadband select models only Connecting to a WlanInserting and removing a SIM Connecting to a wired network Using GPS select models onlyUsing Bluetooth wireless devices Connecting to a local area network LANPage Using pointing devices Setting pointing device preferencesUsing the pointing stick select models only Using the TouchPadUsing TouchPad Gestures Turning the TouchPad off and onOne-finger slide Scrolling Rotating select models only Edge swipes select models only Right-edge swipeTop-edge swipe Left-edge swipeUsing Microsoft Windows 8 shortcut keys Using the keyboardIdentifying the hot keys Using keypads Using the embedded numeric keypad Using an optional external numeric keypad Turning the embedded numeric keypad on and offUsing the media activity controls Connecting speakersAdjusting the volume MultimediaConnecting headphones Connecting a microphoneWebcam select models only Checking audio functions on the computerVideo DisplayPortIntel Wireless Display select models only Power management Shutting down the computerSetting power options Using power-saving statesIntel Rapid Start Technology Initiating and exiting SleepUsing battery power Using the power meter and power settingsSetting password protection on wakeup Enabling and exiting user-initiated HibernationFinding additional battery information Using Battery CheckDisplaying the remaining battery charge Maximizing battery discharge timeManaging low battery levels Inserting or removing the batteryRemoving a battery Conserving battery power Storing a user-replaceable batteryDisposing of a user-replaceable battery select models only Using external AC powerReplacing a user-replaceable battery select models only Using Hybrid Graphics select models only Testing an AC adapterHybrid Graphics select models only Using memory card readers External cards and devicesInserting a memory card Removing a memory cardUsing smart cards select models only Inserting a smart cardUsing a USB device Removing a smart cardConnecting a USB device Using optional external devicesRemoving a USB device Using optional external drives Drives Using hard drivesHandling drives Removing the service door Removing or replacing the service doorReplacing the service door Replacing or upgrading the hard drive Removing the hard driveInstalling a hard drive Using Disk Cleanup Using Disk DefragmenterImproving hard drive performance Using HP 3D DriveGuard Identifying HP 3D DriveGuard statusSecurity Using passwordsProtecting the computer Setting passwords in Windows Password FunctionSetting passwords in Computer Setup Managing a Bios administrator passwordManaging a Computer Setup DriveLock password Entering a Bios administrator passwordSetting a DriveLock password Changing a DriveLock password Entering a DriveLock passwordRemoving DriveLock protection Entering an Automatic DriveLock password Using Computer Setup Automatic DriveLockRemoving Automatic DriveLock protection Using firewall software Using antivirus softwareInstalling critical security updates Installing an optional security cable Using HP Client Security select models onlyUsing the fingerprint reader select models only Locating the fingerprint reader Maintenance Adding or replacing memory modulesPage Cleaning your computer Cleaning procedures Cleaning the display All-in-Ones or NotebooksCleaning the sides or cover Cleaning the TouchPad, keyboard, or mouseUsing SoftPaq Download Manager Backup and recovery Backing up your informationPerforming a system recovery Using the Windows recovery toolsUsing f11 recovery tools Using Windows 8 operating system media purchased separatelyUsing Windows Refresh for quick and easy recovery Remove everything and reinstall WindowsUsing HP Software Setup Computer Setup BIOS, MultiBoot, and System Diagnostics Using Computer SetupStarting Computer Setup Navigating and selecting in Computer SetupRestoring factory settings in Computer Setup Determining the Bios version Updating the BiosDownloading a Bios update About the boot device order Using MultiBootChoosing MultiBoot preferences Dynamically choosing a boot device using the f9 prompt Setting a new boot order in Computer SetupSetting a MultiBoot Express prompt Using System Diagnostics Entering MultiBoot Express preferencesUsing System Diagnostics Support Contacting supportLabels ComponentSerial number Product number Input power SpecificationsOperating environment Traveling with the computer Troubleshooting Troubleshooting resourcesResolving issues Computer is unable to start upComputer screen is blank Software is functioning abnormallyComputer is on but not responding Computer is unusually warmAn external device is not working Wireless network connection is not workingDisc does not play Movie is not visible on an external display Electrostatic discharge Bios IndexWlan SIM
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