HP G56-122US Testing an AC adapter, off

Testing an AC adapter

Test the AC adapter if the computer exhibits any of the following symptoms when it is connected to AC power:

●The computer does not turn on.

●The display does not turn on.

●The power light is off.

To test the AC adapter:

1.Shut down the computer.

2.Remove the battery from the computer.

3.Connect the AC adapter to the computer, and then plug it into an AC outlet.

4.Turn on the computer.

●If the power light turns on, the AC adapter is functioning properly.

●If the power light remains off, the AC adapter is not functioning and should be replaced. Contact technical support for information on obtaining a replacement AC power adapter.

Using external AC power 37

Contents

Page Page Safety warning notice Page Table of contents 5 Multimedia 6 Power management 7 Drives 8 External devices 9 Memory modules Security 11 Backup and Recovery Appendix B Routine care Appendix C Specifications Appendix D Electrostatic discharge 1 Welcome Finding information Page 2 Getting to know your computer Top TouchPad Lights Page Button and speakers Keys Right side Left side Display Wireless antennas Bottom Additional hardware 3 Networking Using an Internet service provider (ISP) Identifying wireless and network status icons Creating a wireless connection Turning wireless devices on and off Using the wireless button Using the operating system controls Connecting to an existing WLAN Setting up a new WLAN Protecting your WLAN Roaming to another network Using Bluetooth wireless devices (select models only) Connecting to a local area network (LAN) Page 4 Pointing devices and keyboard Using the keyboard Page Using the TouchPad Setting pointing device preferences 5 Multimedia Using the media activity controls Audio Adjusting the volume Checking your audio functions Webcam (select models only) Video VGA 6 Power management Shutting down the computer Setting power options Using power-savingstates Initiating and exiting Suspend Initiating and exiting Hibernation Using the Power icon Using battery power Displaying the remaining battery charge Inserting or removing the battery Charging a battery Maximizing battery life Managing low battery levels Identifying low battery levels Resolving a low battery level Conserving battery power Storing a battery Disposing of a used battery Replacing the battery Using external AC power Testing an AC adapter 7 Drives Handling drives Replacing or upgrading the hard drive Removing the hard drive Installing the hard drive Page Using optical drives (select models only) Identifying the installed optical drive Playing a CD Removing a CD Page 8 External devices Using a USB device Connecting a USB device Page Removing a USB device Using optional external devices Using optional external drives 9 Memory modules Page Page Page 10 Security Protecting the computer Using passwords Setting passwords in the operating system 11 Backup and Recovery Performing a system recovery Backing up your information 12 Setup Utility (BIOS) Starting Setup Utility Using Setup Utility Changing the language of Setup Utility Navigating and selecting in Setup Utility Displaying system information Restoring factory default settings in Setup Utility Exiting Setup Utility A Troubleshooting and support Troubleshooting The computer is unable to start up The computer screen is blank Software is functioning abnormally The computer is on but not responding The computer is unusually warm An external device is not working The wireless network connection is not working The optical disc tray does not open for removal of a CD The computer does not detect the optical drive A disc does not play A movie is not visible on an external display The process of burning a disc does not begin, or it stops before completion Contacting customer support Labels B Routine care Cleaning the display Cleaning the TouchPad and keyboard C Specifications Input power Operating environment Page D Electrostatic discharge Index