HP ZBook 15 Mobile manual Computer is unusually warm, An external device is not working

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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.

An external device is not working

Follow these suggestions if an external device does not function as expected:

●Turn on the device according to the manufacturer's instructions.

●Be sure that all device connections are secure.

●Be sure that the device is receiving electrical power.

●Be sure that the device, especially if it is older, is compatible with the operating system.

●Be sure that the correct drivers are installed and updated.

The wireless network connection is not working

If a wireless network connection is not working as expected, follow these suggestions:

●To enable or disable a wireless or wired network device, right-click the Network Connection icon in the notification area, at the far right of the taskbar. To enable devices, select the check box from the menu option. To disable the device, clear the check box.

●Be sure that the wireless device is turned on.

●Be sure that the computer wireless antennas are free from obstructions.

●Be sure that the cable or DSL modem and its power cord are properly connected and that the lights are on.

●Be sure that the wireless router or access point is properly connected to its power adapter and to the cable or DSL modem, and that the lights are on.

●Disconnect and then reconnect all cables, and turn the power off and then back on.

70 Appendix A Troubleshooting and support

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Contents HP Notebook Product notice Safety warning notice Iv Safety warning notice Table of contents VGA Vii Security Input power Operating environment Page Welcome Finding information Resources For information aboutTouchPad Getting to know your computerTop Lights Buttons and fingerprint reader select models only Select Computer Control CenterKeys Fn keyFront Right Environmental NoticesSee Using a USB device on LeftRear Display Bottom Bottom Using an Internet service provider ISP Identifying wireless and network status iconsCreating a wireless connection Turning wireless devices on and offUsing a Wlan Connecting to an existing WlanSetting up a new Wlan Using the operating system controlsProtecting your Wlan Using Bluetooth wireless devices select models only Connecting to a wired networkConnecting to a local area network LAN select models only Roaming to another networkPage Identifying the hot keys Using the keyboardKeyboard and pointing devices Using the TouchPad Using keypadsUsing the integrated numeric keypad Using an optional external numeric keypadSelecting Using TouchPad gesturesNavigating Tapping ScrollingPinching/Zooming Rotating select models onlySetting pointing device preferences Using the pointing stickMultimedia Using the audio featuresAdjusting the volume Checking your audio functions Using the webcam select models onlyUsing video devices Select Configure Display Settings Click Detect Monitors DisplayPort Power management Setting power optionsUsing power-saving states Shutting down the computerUsing the Power icon Using power managementInitiating and exiting Suspend Initiating and exiting HibernationUsing battery power Displaying the remaining battery chargeInserting or removing the battery Viewing the current power management settingsCharging a battery Identifying low battery levels Maximizing battery lifeManaging low battery levels Resolving a low battery level Conserving battery powerStoring a battery Using external AC power Disposing of a used batteryReplacing the battery Testing an AC adapterPage Handling drives Removing or replacing the service coverDrives Removing the service cover Replacing the service coverReplacing or upgrading the hard drive Removing the hard drivePage Installing a hard drive Using memory cards External cards and devicesInserting a memory card Removing a memory cardUsing smart cards select models only Removing a smart card Using ExpressCards select models onlyInserting a smart card Configuring an ExpressCard Inserting an ExpressCardUsing a USB device Removing an ExpressCardUsing optional external devices Connecting a USB deviceUsing the docking connector Using optional external drivesMemory modules Page Page Protecting the computer Using passwordsSecurity Managing a Bios administrator password Setting passwords in the operating systemSetting passwords in Computer Setup Using a Computer Setup DriveLock password Entering a Bios administrator passwordManaging a DriveLock password Entering a DriveLock passwordManaging an Automatic DriveLock password Using Computer Setup Automatic DriveLockUsing firewall software Enabling fingerprint authentication during logon Installing an optional security cableUsing the fingerprint reader select models only Enrolling your fingerprint Select the Use Fingerprint Reader optionBackup and Recovery Creating backupsCreating restore media Backing up your informationPerforming a system recovery Remove everything and reinstall Sled Computer Setup Bios and Advanced System Diagnostics Starting Computer SetupUsing Computer Setup Navigating and selecting in Computer SetupDetermining the Bios version Updating the BiosRestoring factory settings in Computer Setup Downloading a Bios update Using Advanced System Diagnostics MultiBoot About the boot device orderEnabling boot devices in Computer Setup Considering boot order changesChoosing MultiBoot preferences Setting a new boot order in Computer SetupEntering MultiBoot Express preferences Dynamically choosing a boot device using the f9 promptSetting a MultiBoot Express prompt Troubleshooting and support TroubleshootingAn external device is not working Wireless network connection is not workingComputer is unusually warm Movie is not visible on an external display Computer does not detect the optical driveDisc does not play Contacting support Labels Serial number Product number Cleaning your computer Cleaning productsCleaning procedures Cleaning the displayCleaning the TouchPad, keyboard, or mouse Operating environment SpecificationsInput power Electrostatic discharge
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