Troubleshooting Guide

2–4 www.hp.com Troubleshooting Guide
Troubleshooting Without Diagnostics
Helpful Hints
If you encounter problems with the computer, monitor, or software,
see the following list of general suggestions before taking further
action:
■ Check that the computer and monitor are plugged into a working
electrical outlet.
■ Check to see that the voltage select switch (some models) is set to
the appropriate voltage for your region (115V or 230V).
■ Check to see that the computer is turned on and the green power
light is on.
■ Check to see that the monitor is turned on and the green monitor
light is on.
■ Check the Power LED on the front of the computer to see if it is
flashing red. The flashing lights are error codes that will help you
diagnose the problem. Refer to Appendix A, “POST Error
Messages” for more information.
■ Turn up the brightness and contrast controls of the monitor if the
monitor is dim.
■ Press and hold any key. If the system beeps, then the keyboard
should be operating correctly.
■ Check all cable connections for loose connections or incorrect
connections.
■ Wake the computer by pressing any key on the keyboard or
pressing the power button. If the system remains in suspend
mode, shut down the computer by pressing and holding the power
button for at least four seconds then press the power button again
to restart the computer. If the system will not shut down, unplug
the power cord, wait a few seconds, then plug it in again. The
computer will restart if automatic start on power loss is set in
Computer Setup. If it does not restart, press the power button to
start the computer.
■ Reconfigure the computer after installing a non–plug and play
expansion board or other option. See “Solving Hardware
Installation Problems” for instructions.