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

Models: 6423 6427 6439 6449 6483 6493

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Chapter 8. Troubleshooting and diagnostics

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

Contents

Page Page ThinkStation User Guide Second Edition July Copyright Lenovo 2005, Contents Index commandsAppendix A. Manual modem Appendix B. NoticesIntroduction viUser Guide Chapter 1. Important safety information 2User Guide Chapter 2. Arranging your workspace ComfortGlare and lighting Electrical outlets and cable lengths Air circulationConnecting your computer Chapter 3. Setting up your computervIf the voltage supply range is 100–127V AC, set the switch to 115 Chapter 3. Setting up your computer 1 Audio line-in 7.If you have powered speakers with an ac adapter 1 USB connector Turning on computer power Finishing the software installationCompleting important tasks Updating your antivirus software Installing other operating systemsInstalling external options Updating your operating systemMicroprocessor FeaturesSystem management features System informationExpansion for machine types 6423, 6439, and Input/output featuresPower Security featuresOperating systems, preinstalled varies by model Preinstalled softwareSpecifications Chapter 4. Software overview ThinkVantage Rescue and RecoveryThinkVantage Client Security Solution ThinkVantage System Update18User Guide Adobe Acrobat ReaderUsing passwords Chapter 5. Using the Setup UtilityStarting the Setup Utility program Viewing and changing settingsSelecting a startup device User PasswordAdministrator Password Setting, changing, and deleting a passwordChapter 5. Using the Setup Utility Advanced settingsExiting from the Setup Utility program Selecting or changing the startup device sequence22User Guide Chapter 6. Installing and configuring RAID Creating RAID volumesAttaching SATA hard disk drives SUPPORTED SAS RAID configurations Deleting RAID volumes3.Press Enter to go to the RAID Properties screen Properties 17.To delete the New Array, select Manage Array 28User Guide Using system programs Updating flashing BIOS from a diskette or CD-ROMChapter 7. Updating system programs 30User Guide Updating flashing BIOS from your operating systemBasic troubleshooting Chapter 8. Troubleshooting and diagnosticsNotes Diagnostic programsPC-Doctorfor Windows PC-Doctorfor Windows PEPC-Doctorfor DOS Creating a diagnostic CD image Creating diagnostic diskettesRunning diagnostics from the CD or diskettes Cleaning the mouse Optical mouseNon-opticalmouse 1.Turn off your computer Creating and using the Product Recovery disc Chapter 9. Recovering softwarePerforming backup and recovery operations Using the Rescue and Recovery workspace Notes Creating and using rescue mediaCreating and using a Recovery Repair diskette To create rescue media, do the followingTo use rescue media, do one of the following Recovering or installing device drivers Solving recovery problems Setting a rescue device in the startup sequence44User Guide Notes Information resourcesOnline Books folder ThinkVantage Productivity CenterPrograms → ThinkVantage → Productivity Center Safety and WarrantyHelp and service Using the documentation and diagnostic programsUsing other services Calling for service48User Guide Purchasing additional servicesAppendix A. Manual modem commands Basic AT commandsATH ENTER Command Extended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 2 commands Fax Class 1 commandsVoice commands Attention Switzerland User Telekom PTT SCR-BE Taximpulssperrfilter-12kHzPTT Art. Bakom 93.0291.Z.N 56User Guide U.S.A Attention: Lenovo Director of Licensing Appendix B. NoticesLenovo United States, Inc 1009 Think Place - Building One Morrisville, NCTrademarks Television output noticeIndex A Page using continued 62User Guide Page 1P P/N: 43C9722 Part Number: 43C9722 Printed in USA