HP dx2400 manual Blank screen no video Cause Solution

Poor performance is experienced.

Cause	Solution
Some software applications, especially games, are stressful	1. Lower the display resolution for the current application or
on the graphics subsystem		consult the documentation that came with the application
		for suggestions on how to improve performance by
		adjusting parameters in the application.
	2.	Add more memory.
	3.	Upgrade the graphics solution.
Cause unknown.	Restart the computer.
Blank screen (no video).
Cause	Solution
Monitor is not turned on and the monitor light is not on.	Turn on the monitor and check that the monitor light is on.
The cable connections are not correct.	Check the cable connection from the monitor to the computer
	and to the electrical outlet.
You may have a screen blanking utility installed or energy	Press any key or click the mouse button and, if set, type your
saver features are enabled.	password.
Computer is in standby mode.	Press the power button to resume from standby mode.
	CAUTION: 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.
You are using a fixed-sync monitor and it will not sync at the	Be sure that the monitor can accept the same horizontal scan
resolution chosen.	rate as the resolution chosen.
Monitor cable is plugged into the wrong connector.	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.
Bad monitor.	Try a different monitor.

Computer is beeping and will not start.

Cause Solution

Internal error has occurred and the computer is beeping a code.

Refer to Interpreting POST Audible Codes on page 14 to interpret the error code.

12 Chapter 2 Troubleshooting ENWW