Chapter 6. Troubleshooting and diagnostic programs

This chapter provides information about some basic troubleshooting and diagnostic programs. If your computer problem is not described in this chapter, see Chapter 7 “Getting information, help, and service” on page 75 for additional troubleshooting resources.

This chapter contains the following topics:

•“Basic troubleshooting” on page 71

•“Diagnostic programs” on page 72

•“Cleaning an optical mouse” on page 74

Basic troubleshooting

The following table provides some basic information to help you troubleshoot your computer problems.

Note: If you cannot solve the problem after doing the basic troubleshooting, have the computer serviced. Refer to the ThinkCentre Safety and Warranty Guide that came with your computer for the safety and warranty information and the list of service and support telephone numbers. You can also get the latest service and support telephone numbers from the Lenovo Support Web site at: http://www.lenovo.com/support

Symptom

Action

 

 

The computer does not start

Verify that:

when you press the power

• The power cord is correctly connected to the rear of the computer and to a

switch.

working electrical outlet.

 

 

• The power indicator on the front of the computer is on.

 

• The computer voltage matches the voltage available at the electrical outlet for

 

your country or region.

 

 

The monitor screen is blank.

Verify that:

 

• The power cord is correctly connected to the rear of the computer and to a

 

working electrical outlet.

 

• The computer voltage matches the voltage available at the electrical outlet for

 

your country or region.

 

• The brightness and contrast controls are set correctly.

 

 

The USB keyboard or mouse

Verify that:

does not work.

• The computer is turned on.

 

 

• The USB keyboard or mouse is correctly connected to one of the USB

 

connectors on the computer.

 

• For the USB keyboard, no keys are stuck.

 

• The USB mouse is clean. Refer to “Cleaning an optical mouse” on page 74.

 

 

© Copyright Lenovo , 2011

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Lenovo 3650, 3091, 3265, 4285, 870, 852, 800, 5205, 5248, 3678, 3429 Troubleshooting and diagnostic programs, Basic troubleshooting
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852, 800, 3091, 3429, 5248 specifications

Lenovo has established a reputation for producing reliable and innovative technology solutions, particularly in the realm of computing. The models Lenovo 4285, 5205, 2471, 2557, and 3265 are prime examples of the brand's commitment to performance, efficiency, and user experience.

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