Lenovo a70z 0401 Guia Do Utilizador
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 25 for additional troubleshooting resources.
computer problem is not described here, see Chapter 7, “Getting information, help,
and service,” on page 25 for additional troubleshooting resources.
Basic troubleshooting
The following table provides some basic information to help you troubleshoot your
computer problems.
computer problems.
Note:
If you cannot correct 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 Lenovo Support telephone numbers.
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.
Symptom
Action
The computer does not start
when you press the power
switch.
when you press the power
switch.
Verify that:
v
The power cord is correctly connected to the rear of the computer and to a
working electrical outlet.
working electrical outlet.
v
If there is a secondary power switch on the back of your computer, make sure
that it is switched on.
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.
your country or region.
The monitor screen is blank.
Verify that:
v
The power cord is correctly connected to the rear of the computer and to a
working electrical outlet.
working electrical outlet.
v
The computer voltage matches the voltage available at the electrical outlet for
your country or region.
your country or region.
The USB keyboard does not
work.
work.
Verify that:
v
The computer is turned on.
v
The USB keyboard is correctly connected to one of the USB connectors on the
computer.
computer.
v
No keys are stuck.
The USB mouse does not work.
Verify that:
v
The computer is turned on.
v
The USB mouse is correctly connected to one of the USB connectors on the
computer.
computer.
v
The USB mouse is clean. Refer to “Cleaning the mouse” on page 21.
The operating system does not
start.
start.
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 15.
system resides. Usually, the operating system is on the hard disk drive. For more
information, see “Selecting a startup device” on page 15.
The computer beeps multiple
times before the operating
system starts.
times before the operating
system starts.
Verify that no keys are stuck.
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