Lenovo 6439, 6493, 6483, 6449, 6427, 6423 manual Troubleshooting and diagnostics, Basic troubleshooting

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Chapter 8. Troubleshooting and diagnostics

This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is not described here, see Chapter 10, “Getting information, help, and service,” on page 45 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,
	make sure that it is switched on.
	v The power indicator on the front of the computer is on.
	If you cannot correct the problem, have the computer serviced. Refer to the
	safety and warranty 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.
	If you cannot correct the problem, have the computer serviced. Refer to the
	safety and warranty 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 the keyboard connector on the
	computer.
	v No keys are stuck.
	If you cannot correct the problem, have the computer serviced. Refer to the
	safety and warranty information that is provided with your computer for a list of
	service and support telephone numbers.

© Lenovo 2005, 2008. Portions © IBM Corp. 2005.

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Contents Page Page ThinkStation User Guide Page Contents Appendix A. Manual modem Appendix B. Notices Commands Introduction Vi User Guide Additional safety requirements for machine types 6427, 6449, Important safety informationUser Guide Arranging your workspace ComfortGlare and lighting Electrical outlets and cable lengths Air circulationConnecting your computer Setting up your computerUser Guide Setting up your computer Phone Line Setting up your computer 1394 Turning on computer power Finishing the software installationCompleting important tasks Updating your antivirus software Installing other operating systemsInstalling external options Updating your operating systemSystem information FeaturesInput/output features Operating systems, preinstalled varies by model Environment SpecificationsPC-Doctor for WINPE, PC-Doctor for Windows Software overviewSoftware provided with your Windows operating system Software provided by LenovoAdobe Acrobat Reader 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 passwordAdvanced settings Exiting from the Setup Utility programSelecting or changing the startup device sequence User Guide Installing and configuring RAID Creating RAID volumesAttaching Sata hard disk drives Supported SAS RAID configurations Deleting RAID volumesInstalling and configuring RAID Properties Installing and configuring RAID User Guide Using system programs Updating flashing Bios from a diskette or CD-ROMUpdating system programs Updating flashing Bios from your operating system Basic troubleshooting Troubleshooting and diagnosticsDiagnostic programs PC-Doctor for Windows PC-Doctor for Windows PEPC-Doctor for DOS Creating a diagnostic CD image Cleaning the mouse Optical mouseNon-optical mouse 1 Retainer ring 2 Ball 3 Plastic rollers 4 Ball cage Creating and using the Product Recovery disc Recovering softwarePerforming backup and recovery operations Using the Rescue and Recovery workspace Creating and using rescue media To create rescue media, do the following Creating and using a Recovery Repair disketteRecovering or installing device drivers Solving recovery problems Setting a rescue device in the startup sequenceUser Guide ThinkVantage Productivity Center Getting information, help, and serviceInformation resources Online Books folderSafety and Warranty Help and serviceUsing the documentation and diagnostic programs Using other services Calling for servicePurchasing additional services Basic 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 Using User Guide Page Part Number 43C9722