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HP CQ56-154CA, CQ56-110US manual A Troubleshooting and support, The computer is unable to start up

Models: CQ56-104CA

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A Troubleshooting and support

A Troubleshooting and support

●Troubleshooting

●Contacting customer support

●Labels

Troubleshooting

The following sections describe several common issues and solutions.

The computer is unable to start up

If the computer does not turn on when you press the power button, the following suggestions may help you determine why the computer does not start up:

●If the computer is plugged into an AC outlet, plug another electrical device into the outlet to be sure that the outlet is providing adequate power.

NOTE: Use only the AC adapter provided with the computer or one approved by HP for this computer.

●If the computer is plugged into an external power source other than an AC outlet, plug the computer into an AC outlet using the AC adapter. Be sure that the power cord and AC adapter connections are secure.

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 Suspend state or in Hibernation. To exit Suspend or Hibernation, briefly press the power button. Suspend and Hibernation are energy-saving features that turn off the display. Suspend and Hibernation 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 Power icon 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 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 f4 repeatedly, the image alternates among the computer display, one or more external displays, and simultaneous display on all devices.

58 Appendix A Troubleshooting and support

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HP CQ56-154CA, CQ56-110US A Troubleshooting and support, The computer is unable to start up, The computer screen is blank

Contents

HP Notebook User Guide Product notice Software termsSafety warning notice iv Safety warning notice 2 Getting to know your computer Table of contents1 Welcome 3 Networking6 Power management 5 MultimediaAppendix A Troubleshooting and support 11 Backup and RecoverySetup Utility BIOS 7 DrivesAppendix C Specifications Appendix B Routine careAppendix D Electrostatic discharge 1 Welcome Finding informationFinding information To access this guide Safety & Comfort GuideProper workstation setup, posture, health, and work habits Electrical and mechanical safety informationTop Right side Left side Display Wireless antennas Bottom 2 Getting to know your computerAdditional hardware TouchPad LightsComponent DescriptionComponent Button and speakersControl Center System Power Management DescriptionKeys Right side ComponentDescription Left side ComponentDescription Component Display10 Chapter 2 Getting to know your computer DescriptionWireless antennas Component Bottom12 Chapter 2 Getting to know your computer DescriptionComponent Additional hardwareAdditional hardware DescriptionCreating a wireless connection Using a WLAN Using an Internet service provider ISPIdentifying wireless and network status icons Using Bluetooth wireless devices select models onlyUsing an Internet service provider ISP Using a WLAN Identifying wireless and network status iconsCreating a wireless connection Turning wireless devices on and offConnecting to an existing WLAN Setting up a new WLANProtecting your WLAN Roaming to another networkUsing Bluetooth wireless devices select models only Connecting to a local area network LAN2. Plug the other end of the cable into a network wall jack 20 Chapter 3 NetworkingUsing the keyboard Using the keyboard Using the TouchPad4 Pointing devices and keyboard 22 Chapter 4 Pointing devices and keyboard FunctionAction key Using the TouchPad Setting pointing device preferences5 Multimedia Using the media activity controlsUsing the media activity controls Audio Webcam select models only VideoPlay music Record sound Download music from the Internet AudioYour computer enables you to use a variety of audio features Create multimedia presentationsChecking your audio functions Adjusting the volumeWebcam select models only 1. Select Computer Control CenterVideo Using external AC power 6 Power managementShutting down the computer Setting power options Using battery power Shutting down the computerInitiating and exiting Suspend Setting power optionsUsing power-saving states Initiating and exiting HibernationUsing power management Using battery powerUsing the Power icon Viewing the current power management settingsDisplaying the remaining battery charge Inserting or removing the battery Charging a battery Identifying low battery levels Maximizing battery lifeManaging low battery levels 1. Select Computer Control Center Power ManagementResolving a low battery level Conserving battery powerStoring a battery Resolving a low battery level when external power is availableUsing external AC power Disposing of a used batteryReplacing the battery Testing an AC adapter Handling drives Using optical drives select models only7 Drives Handling drives Replacing or upgrading the hard driveReplacing or upgrading the hard drive Removing the hard driveInstalling the hard drive 4. Close the cover 5. Tighten the hard drive cover screws 6. Replace the battery 7. Turn the computer right-side up8. Reconnect external power and external devices 9. Turn on the computerPlaying a CD Using optical drives select models onlyIdentifying the installed optical drive Removing a CDUsing optical drives select models only 3. Close the disc tray, and then place the disc in a protective caseUsing a USB device Using optional external devices Using a USB deviceConnecting a USB device 8 External devicesUsing a USB device Using optional external devices Using optional external drivesRemoving a USB device 9 Memory modules 8. Lift the memory module compartment cover 2 away from the computer 10. Insert a new memory module48 Chapter 9 Memory modules 14. Replace the battery 15. Turn the computer right-side up 12. Close the cover 13. Tighten the memory module compartment screws16. Reconnect external power and external devices 17. Turn on the computer50 Chapter 9 Memory modules 10 Security Using passwordsProtecting the computer Using passwords Protecting the computer52 Chapter 10 Security Setting passwords in the operating systemOperating system passwords Function11 Backup and Recovery Performing a system recovery Backing up your information Using Setup Utility 12 Setup Utility BIOSStarting Setup Utility Changing the language of Setup UtilityRestoring factory default settings in Setup Utility Exiting Setup UtilityDisplaying system information Troubleshooting Contacting customer support Labels A Troubleshooting and supportTroubleshooting The computer is unable to start upThe computer is unusually warm Software is functioning abnormallyThe computer is on but not responding An external device is not workingThe wireless network connection is not working The optical disc tray does not open for removal of a CDA movie is not visible on an external display The computer does not detect the optical driveA disc does not play 2. Click Computer and then click System MonitorContacting customer support Labels ComponentCleaning the display Cleaning the TouchPad and keyboard B Routine care64 Appendix B Routine care Cleaning the display Cleaning the TouchPad and keyboard Input power Operating environment C SpecificationsInput power Operating environment68 Appendix C Specifications 15 m to 3,048 m15 m to 12,192 m D Electrostatic discharge Index