Chapter 6. Troubleshooting And Diagnostics; Basic Troubleshooting - Lenovo ThinkCentre A58e 3425 User Manual

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 some basic information to help you troubleshoot your
computer problems.
Note: If you cannot correct the problem after doing the basic troubleshooting, have
Symptom
The computer does not start
when you press the power
switch.
The monitor screen is blank.
The USB keyboard does not
work.
The USB mouse does not work.
The operating system does not
start.
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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 Lenovo Support telephone numbers.
Verify that:
v The power cord is correctly connected to the rear of the computer and to a
working electrical outlet.
v If there is a secondary power switch on the back of your computer, make sure
that it is switched on.
v The power indicator on the front of the computer is on.
v The computer voltage matches the voltage available at the electrical outlet for
your country or region.
Verify that:
v The monitor signal cable is correctly connected to the monitor and to an
appropriate monitor connector on the computer.
v The monitor power cord is correctly connected to the monitor and to a
working electrical outlet.
v The monitor is turned on and the brightness and contrast controls are set
correctly.
v The computer voltage matches the voltage available at the electrical outlet for
your country or region.
v If your computer has two monitor connectors, be sure to use the connector on
the graphics card.
Verify that:
v The computer is turned on.
v The USB keyboard is correctly connected to one of the USB connectors on the
computer.
v No keys are stuck.
Verify that:
v The computer is turned on.
v The USB mouse is correctly connected to one of the USB connectors on the
computer.
v The USB mouse is clean. Refer to "Cleaning the mouse" on page 47.
Verify that the startup device sequence includes the device where the operating
system resides. Usually, the operating system is on the hard disk drive. For more
information, see "Selecting a startup device" on page 41.
Action
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