Lenovo 8810, 8814, 8801, 8793, 8805, 8797, 8011 Troubleshooting and diagnostics, Basic troubleshooting

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Chapter 7. Troubleshooting and diagnostics

This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is not described here, see Chapter 8, “Getting information, help, and service,” on page 61 for additional troubleshooting resources.

Basic troubleshooting

The following table provides information to help you troubleshoot your computer problem.

Symptom	Action

The computer does not start	Verify that:
when you press the power	v The power cord is plugged into the rear of the computer and into a working
button.	electrical outlet.
	electrical outlet.
	v If your computer has a secondary power switch on the back of the computer,
	ensure that it is switched on.
	v The power indicator on the front of the computer is on.
	v The voltage is set to the correct setting for your country.
	If you cannot correct the problem, have the computer serviced. Refer to the
	warranty and safety information that is provided with your computer for a list of
	service and support telephone numbers.

The monitor screen is blank.	Verify that:
	v The monitor cable is securely attached to the rear of the monitor and to the
	rear of the computer.
	v The monitor power cord is plugged into the monitor and into a working
	electrical outlet.
	v The monitor is turned on and the brightness and contrast controls are set
	correctly.
	v The monitor signal cable is securely connected to the monitor and to the
	monitor connector on the computer.
	Note: If your computer has two monitor connectors, verify that your monitor is
	connected to the one in the AGP option connector rather than the one in the rear
	of the system board. For more information, “Connecting your computer” on page
	3.
	If you cannot correct the problem, have the computer serviced. Refer to the
	warranty and safety information that is provided with your computer for a list of
	service and support telephone numbers.

The keyboard does not work.	Verify that:
The computer does not respond	v The computer is turned on.
to the keyboard.	v The monitor is turned on and the brightness and contrast controls are set

	correctly.
	v The keyboard is securely connected to a USB connector on the front or rear of
	the computer.
	v No keys are stuck.
	If you cannot correct the problem, have the computer serviced. Refer to the
	warranty and safety information that is provided with your computer for a list of
	service and support telephone numbers.

© Lenovo 2005, 2006. Portions © IBM Corp. 2005.

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Contents User Guide Types 8011, 8793, 8797 Types 8805, 8810 Page User Guide Types 8011, 8793, 8797 Types 8805, 8810 Page Contents Appendix B. Notices Conditions that require immediate action Important safety informationService General safety guidelinesPower cords and power adapters Batteries Extension cords and related devicesPlugs and outlets Heat and product ventilation CD and DVD drive safetyLithium battery notice Additional safety informationLaser compliance statement Modem safety informationPower supply statement Introduction Xiv User Guide Glare and lighting Arranging your workspaceComfort Electrical outlets and cable lengths Air circulationConnecting your computer Setting up your computerUser Guide Setting up your computer 1394 Setting up your computer Completing important tasks Turning on powerFinishing the software installation Shutting down the computer Installing other operating systemsUpdating your operating system Updating your antivirus softwareUser Guide Features Installing optionsInternal drives Operating systems, preinstalled varies by model Available options Environment SpecificationsSupported operating positions Handling static-sensitive devices Tools requiredLocating connectors on the front of your computer Installing external optionsLocating connectors on the rear of your computer Obtaining device drivers Connector DescriptionOpening the cover Locating components Identifying parts on the system board Installing memory What to do next Installing PCI adaptersUser Guide Installing internal drives Drive specifications Installing a drive in bay Connecting drives Connecting additional serial ATA hard disk drive Installing a diskette drive in bay What to do next Identifying security locks Security featuresRope Clip Integrated cable lock Password protection Changing the battery Erasing a lost or forgotten password clearing Cmos Closing the cover and connecting the cables User Guide Creating and using product recovery discs Recovering softwareTo use Product Recovery discs, do the following Backup and recoveryUsing the Rescue and Recovery workspace Creating and using rescue media Solving recovery problemsTo create rescue media, do the following Creating and using a Recovery Repair disketteSetting a rescue device in the startup sequence Recovering or installing device driversRecovering software User Guide Using passwords Using the Setup UtilityStarting the Setup Utility program Viewing and changing settingsSelecting a startup device User PasswordAdministrator Password Setting, changing, and deleting a passwordChanging the startup device sequence Advanced settingsExiting from the Setup Utility program User Guide Updating system programs Using system programsUpdating flashing Bios from a diskette User Guide Basic troubleshooting Troubleshooting and diagnosticsDiagnostic programs PC-Doctor for DOS PC-Doctor for WindowsRunning diagnostics from the CD or diskettes Cleaning the mouseNon-optical mouse Optical mouseUser Guide ThinkVantage Productivity Center Getting information, help, and serviceInformation resources Online Books folderHelp and service Access HelpWarranty and safety Calling for service Using the documentation and diagnostic programsPurchasing additional services Using other servicesBasic AT commands Appendix A. Manual modem commandsLow speaker volume Enable RTS/CTS hardware flow control Extended AT commands+MS=? MNP/V.42/V.42bis/V.44 commandsFax Class 2 commands Fax Class 1 commandsVoice commands Appendix A. Manual modem commands User Guide Appendix B. Notices Trademarks Television output noticeIndex Page Page Part Number

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