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Chapter 09
Troubleshooting Guide
Requirements Before Contacting Samsung
Customer Service Center
― Before calling Samsung Customer Service Center, test your product as follows. If the problem persists,
contact Samsung Customer Service Center.
Testing the Product
Check if your product is operating normally by using the product test function.
If the screen is turned off and the power indicator blinks even though the product is properly connected
to a PC, perform a self-diagnosis test.
1
Power off both the PC and product.
2
Disconnect the cables from the product.
3
Power on the product.
4
If the message
Check Signal Cable
appears, the product is working normally.
― If the screen remains blank, check the PC system, video controller and cable.
Checking the Resolution and Frequency
For a mode that exceeds the supported resolution(refer to
Not Optimum Mode
will appear for a short time.
― The displayed resolution may vary, depending on the computer system settings and cables.
Standard Signal Mode
Table), the message
Check the following.
Installation issue (PC mode)
The screen keeps switching on and off.
Check the cable connection between the product and PC, and ensure the connectors are locked.
Screen issue
The power LED is off. The screen will not switch on.
Check that the power cable is connected properly.
The message
Check Signal Cable
appears.
Check that the cable is properly connected to the product.
Check that the device connected to the product is powered on.
Not Optimum Mode
is displayed.
This message appears when the signal from the graphics card exceeds the maximum resolution or
frequency for the product.
Change the maximum resolution and frequency to suit the product performance, referring to
Standard Signal Mode Table (P.40).
The images on the screen look distorted.
Check the cable connection to the product.
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