Samsung Comprehensive Troubleshooting Guide for Your NC240 Monitor

5 Troubleshooting

5-1 Monitor Self-Diagnosis

•You can check if the product is working properly using the Self-Diagnosis function.

•If a blank screen is displayed and the Power LED blinks even if the product and the PC are properly connected, perform the self-diagnosis function according to the procedures below.

1.Turn the product and the PC off.

2.Separate the signal cable from the product .

3.Turn the product on.

4.If the product is working properly, the <Check Signal Cable> message appears.

In this case, if a blank screen is displayed again, make sure that there is no problem with the PC and the connection. The product is working properly.

5-2 Before Requesting Service

Please check the following before requesting After-Sales service. If the problem continues, please contact your nearest Samsung Electronics Service Center.

A blank screen appears / I cannot turn the product on

Is the power cord connected properly?	Check the connection status of the power cord.
Is the <Check Signal Cable> message displayed on the	Check the cable connecting the PC and the product.
screen?	If the message appears on the screen even if the cable is
	properly connected, recheck the input signal by pressing the
	/SOURCE button of the product.
Is the <Not Optimum Mode> message displayed on the	This occurs when the signal from the graphics card exceeds
screen?	the maximum resolution or the maximum frequency of the
	product.
	In this case, set up the appropriate resolution and the fre-
	quency for the product.
Is a blank screen displayed and does the power LED blink at	This occurs when the power saving function is running.
a 1 second interval?	If you click the mouse or press any key, the screen will be
	turned on.

The buttons on the monitor are not functioning.

Is the key lock mode enabled?

Disable the key lock mode if it is enabled.

The color is weird / The picture is displayed in black and white

Is the entire screen displayed in the same color as if viewing	Check the cable connection to the computer.
the screen through a cellophane paper?	Reinsert the graphics card into the computer completely.
	Check if the <Color Effect> is set to <Off>.
Is the graphics card configured correctly?	Set up the graphics card referring to the user manual.

Troubleshooting 5-1