Lenovo 4218, 4155, 4158 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 47 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.

© Copyright Lenovo 2009

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Contents ThinkStation User Guide Page ThinkStation User Guide Second Edition October Copyright Lenovo Contents Appendix B. System memory speed Appendix C. Notices Introduction Vi User Guide Important safety information 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 User Guide Setting up your computer If you have powered speakers with an ac power adapter 1394 Completing important tasks Turning on computer powerFinishing the software installation Installing external options Installing other operating systemsUpdating your operating system Updating your antivirus softwareFeatures Installing the computer on a rack shelfConnectivity Security features Dimensions SpecificationsUser Guide Software provided by Lenovo Software overviewSoftware provided with your Windows operating system Lenovo ThinkVantage Toolbox PC-Doctor for Rescue and RecoveryLenovo System Toolbox Adobe ReaderStarting the Setup Utility program Using the Setup UtilityViewing and changing settings Using passwordsUser Password Password considerationsAdministrator Password Setting, changing, and deleting a passwordSelecting a temporary startup device Enabling or disabling a deviceSelecting a startup device Selecting or changing the startup device sequence Advanced settingsExiting from the Setup Utility program Installing Sata or SAS hard disk drives Installing hard disk drives and configuring RAIDFrom the RAID Config menu, select Create array From the RAID Config menu, select Delete array Configuring the Marvell Bios Setup to delete an arrayUser Guide Updating system programs Using system programsUpdating flashing Bios from a disc Recovering from a POST/BIOS update failure Updating flashing Bios from your operating systemUpdating system programs User Guide Basic troubleshooting Troubleshooting and diagnosticsDiagnostic programs Troubleshooting and diagnostics PC-Doctor for DOS Creating a diagnostic discNon-optical mouse Cleaning the mouseOptical mouse 2 Ball 3 Plastic rollers 4 Ball cage Creating recovery media Recovery informationCreating and using recovery media Performing backup and recovery operations Using recovery mediaPerforming a recovery operation Performing a backup operationUsing the Rescue and Recovery workspace Creating rescue media Creating and using rescue mediaCreating a recovery repair diskette Using rescue mediaCreating and using a recovery repair diskette Installing or reinstalling device drivers Using a recovery repair disketteSolving recovery problems Setting a rescue device in the startup sequenceInformation resources Getting information, help, and serviceOnline Books folder Lenovo ThinkVantage ToolsHelp and service Safety and WarrantyUsing the documentation and diagnostic programs Calling for serviceUsing other services Purchasing 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. System memory speed User Guide Appendix C. Notices European conformance CE mark Trademarks Television output noticeIndex Page Page User Guide Page Part Number 53Y4327