HP 6720t Mobile manual Computer is on but not responding

Page 52

466202-002.book Page 48 Wednesday, February 20, 2008 11:44 PM

Troubleshooting

Standby is an energy-saving feature that turns off the display. Standby can be initiated by the system while the computer is on but not in use, or when the computer has reached a low battery level.

To change these and other power settings:

1.Click Start, and then click Control Panel.

2.Click Performance and Maintenance, and then click Power Options.

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 device, 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 display devices, and simultaneous display on all devices.

The computer is on but not responding

If the computer is on but not responding to software or keyboard commands, turn off the computer by using the standard shutdown procedure:

1.Save your work and close all programs.

2.Click Start, click Turn Off Computer, and then click Turn Off.

If you have been registered to a network domain, the button you click will be called Shut Down instead of Turn Off Computer.

If you are unable to turn off the computer with these steps, try the following emergency shutdown procedures, in the sequence provided, until shutdown occurs:

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

Press ctrl+alt+delete, click Shut Down, and then click Turn Off.

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

Disconnect the computer from external power and remove the battery.

 

 

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Getting Started

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Getting Started HP Compaq 6720t Mobile Thin ClientBook Page ii Wednesday, February 20, 2008 1144 PM Contents Book Page iv Wednesday, February 20, 2008 1144 PM Basic setup Unpack the boxInsert the battery Connect the computer to external power Open the computer Turn on the computer Automatic logon Enter your logon informationManual logon Administrator logon Begin managing your network network administrators onlyConnect to a computer network Download the Deployment Solution console Quick tour Top componentsPointing devices Front componentsLeft-side components Right-side components Rear componentsBottom components Wireless antennae Product information Important display information Regulatory, safety, and environmental noticesRegulatory notices Federal Communications Commission notice ModificationsBook Page 16 Wednesday, February 20, 2008 1144 PM Brazilian notice Canadian noticesEuropean Union notices Avis CanadienBook Page 19 Wednesday, February 20, 2008 1144 PM Products with 2.4-GHz wireless LAN devices Ergonomics notice Indian notice Japanese noticesBook Page 23 Wednesday, February 20, 2008 1144 PM Book Page 24 Wednesday, February 20, 2008 1144 PM Wireless WAN certification markings Korean notice Singaporean wireless notice Taiwan noticeAirline travel notice Battery noticesEnergy Star compliance Laser compliance Modem noticesTelecommunications device approvals Modem statementsModem declarations Product information Getting Started Book Page 32 Wednesday, February 20, 2008 1144 PM Book Page 33 Wednesday, February 20, 2008 1144 PM Book Page 34 Wednesday, February 20, 2008 1144 PM Canadian modem statements Japanese modem statements New Zealand modem statements Power cord notices Voice supportHeat-related safety warning notice Battery notices Safety noticesMacrovision Corporation notice Headset and earphone volume level notice Cleaning the keyboardBattery disposal Electronic hardware and battery recycling Environmental noticesChinese material content declarations Toxic and Hazardous Substances and ElementsBook Page 43 Wednesday, February 20, 2008 1144 PM Wireless Cards Perchlorate material special handling may applyRated input power Operating environmentBook Page 46 Wednesday, February 20, 2008 1144 PM Computer is unable to start up Quick troubleshootingComputer screen is blank Computer is on but not responding Computer is unusually warm Wireless network connection is not workingSome external devices are not working Contacting technical support Index Index Getting Started Index-3 Book Page 4 Wednesday, February 20, 2008 1144 PM
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