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Chapter 2 Troubleshooting - HP Compaq dx2390 Troubleshooting Manual

Microtower models business pcs.
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Poor performance is experienced.
Some software applications, especially games, are stressful
on the graphics subsystem
Cause unknown.
Blank screen (no video).
Monitor is not turned on and the monitor light is not on.
The cable connections are not correct.
You may have a screen blanking utility installed or energy
saver features are enabled.
Computer is in standby mode.
You are using a fixed-sync monitor and it will not sync at the
resolution chosen.
Monitor cable is plugged into the wrong connector.
Bad monitor.
Computer is beeping and will not start.
Internal error has occurred and the computer is beeping a

Chapter 2 Troubleshooting

Lower the display resolution for the current application or
consult the documentation that came with the application
for suggestions on how to improve performance by
adjusting parameters in the application.
Add more memory.
Upgrade the graphics solution.
Restart the computer.
Turn on the monitor and check that the monitor light is on.
Check the cable connection from the monitor to the computer
and to the electrical outlet.
Press any key or click the mouse button and, if set, type your
Press the power button to resume from standby mode.
When attempting to resume from standby mode,
do not hold down the power button for more than four seconds.
Otherwise, the computer will shut down and you will lose any
unsaved data.
Be sure that the monitor can accept the same horizontal scan
rate as the resolution chosen.
Ensure that the monitor is plugged into an active connector on
the rear of the computer. If another connector is available,
connect the monitor to that connector and reboot the system.
Try a different monitor.
Refer to
Interpreting POST Audible Codes on page 14
interpret the error code.


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