Chapter 6. Troubleshooting and diagnostics
This chapter describes some basic troubleshooting and diagnostic programs. If your computer problem is not described here, see Chapter 7 “Getting information, help, and service” on page 51 for additional troubleshooting resources.
Basic troubleshooting
The following table provides information to help you troubleshoot your computer problems.
Note: If you cannot correct the problem, have the computer serviced. For a list of service and support telephone numbers, refer to the ThinkCentre Safety and Warranty Guide that comes with your computer or go to the Lenovo Support Web site at http://www.lenovo.com/support/phone.
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. | ||
| ||
| • If your computer has a secondary power switch on the rear of the computer, | |
| make sure that it is switched on. | |
| • 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 monitor signal cable is correctly connected to the monitor and to the | |
| appropriate monitor connector on the computer. | |
| • The monitor power cord is correctly connected to the monitor and to a working | |
| electrical outlet. | |
| • The monitor is turned on and the brightness and contrast controls are set | |
| correctly. | |
| • The computer voltage matches the voltage available at the electrical outlet for | |
| your country or region. | |
| • If your computer has two monitor connectors, be sure to use the connector | |
| on the graphics card. | |
|
| |
The keyboard does not work. | Verify that: | |
| • The computer is turned on. | |
| • The keyboard is securely connected to a USB connector on the computer. | |
| • No keys are stuck. | |
|
| |
The mouse does not work. | Verify that: | |
| • The computer is turned on. | |
| • The mouse is securely connected to a USB connector on the computer. | |
| • The mouse is clean. Refer to “Cleaning an optical mouse” on page 50 for further | |
| information. | |
|
|
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