Lenovo 9140, 9136, 9127, 9134, 9129, 9158, 9157 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 9, “Getting information, help, and service,” on page 39 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.
	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
	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 voltage is set to the correct setting for your country.
	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 option connector rather than the one in the rear of the system
	board. For more information, see “Connecting your computer” on page 6.
	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, 2007. Portions © IBM Corp. 2005.

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Contents ThinkCentre User Guide Page ThinkCentre User Guide Page Contents Iv User Guide Introduction Vi User Guide Important safety information User Guide Arranging your workspace ComfortGlare and lighting Electrical outlets and cable lengths Air circulationInstalling the vertical stand Setting up your computerConnecting your computer Setting up your computer Phone Line Setting up your computer 1394 Turning on computer power Finishing the software installationCompleting important tasks Features Installing other operating systemsUpdating your operating system Updating your antivirus softwareMicroprocessor Expansion Environment SpecificationsHeight 108 mm 4.25 Width 331 mm 13.03 Depth 412 mm 16.22 Software overview Software provided with your Windows operating systemSoftware provided by Lenovo Adobe Acrobat Reader PC Doctor for Winpe and PC Doctor for WindowsStarting the Setup Utility program Using the Setup UtilityViewing and changing settings Using passwordsAdministrator Password User PasswordSetting, changing, and deleting a password Using Security Profile by DeviceSelecting a startup device Selecting a temporary startup deviceSelecting or changing the startup device sequence Exiting from the Setup Utility program Using system programs Updating flashing Bios from a CD-ROM or disketteUpdating system programs Click Continue Click Downloads and drivers Updating flashing Bios from your operating systemBasic troubleshooting Troubleshooting and diagnosticsDiagnostic programs PC-Doctor for DOS PC-Doctor for WindowsRunning diagnostics from the CD or diskettes PC-Doctor for Windows PE Cleaning the mouseOptical mouse Non-optical mouse1 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 Information resources Getting information, help, and serviceOnline Books folder ThinkVantage Productivity CenterAccess Help Safety and WarrantyHelp and service 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 User Guide Page Part Number 43C4865

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