Chapter 8. Troubleshooting and diagnostics

This chapter describes some basic troubleshooting and diagnostic programs. If your

computer problem is not described here, see Chapter 10, “Getting information,

help, and service,” on page 47 for additional troubleshooting resources.

Basic troubleshooting

The following table provides information to help you troubleshoot your computer

problem.

Symptom Action
The computer does not start
when you press the power
button.
Verifythat:
vThe power cord is plugged into the rear of the computer and into a working
electrical outlet.
vIf your computer has a secondary power switch on the back of the computer,
make sure that it is switched on.
vThe power indicator on the front of the computer is on.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
The monitor screen is blank. Verifythat:
vThe monitor cable is securely attached to the rear of the monitor and to the
rear of the computer.
vThe monitor power cord is plugged into the monitor and into a working
electrical outlet.
vThe monitor is turned on and the brightness and contrast controls are set
correctly.
vThe monitor signal cable is securely connected to the monitor and to the
monitor connector on the computer.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
The keyboard does not work.
The computer does not respond
to the keyboard.
Verifythat:
vThe computer is turned on.
vThe monitor is turned on and the brightness and contrast controls are set
correctly.
vThe keyboard is securely connected to the keyboard connector on the
computer.
vNo keys are stuck.
If you cannot correct the problem, have the computer serviced. Refer to the
safety and warranty information that is provided with your computer for a list of
service and support telephone numbers.
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