Chapter 7. 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 8 “Getting information, help, and service” on page 65 for additional troubleshooting resources.

This chapter contains the following topics:

“Basic troubleshooting” on page 61

“Diagnostic programs” on page 62

“Cleaning an optical mouse” on page 64

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 ThinkStation Safety and Warranty Guide that came with your computer for the safety and warranty information and the list of Lenovo Support telephone numbers.

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 keyboard or mouse is correctly connected to one of the USB connectors

 

on the computer.

 

• For the keyboard, no keys are stuck.

 

• The mouse is clean. Refer to “Cleaning an optical mouse” on page 64.

 

 

The operating system does not

Verify that you list the device where the operating system resides in the startup

start.

device sequence. Usually, the operating system is on the hard disk drive. For more

 

information, see “Selecting a startup device” on page 51.

 

 

The computer beeps multiple

Verify that no keys are stuck.

times before the operating

 

system starts.

 

 

 

© Copyright Lenovo 2010, 2011

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Lenovo 4265, 4271, 4272, 4269, 4264, 4266, 4263, 4262 manual Troubleshooting and diagnostic programs, Basic troubleshooting

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