7. Troubleshooting Guide
■ Product diagnosis (Screen issue)
If a problem occurs with the product screen, run Self Diagnosis to check that the product is working properly.
■ Checking the Resolution and Frequency
If a resolution that is not supported is selected, the Not Optimum Mode message may appear for a short time
or the screen may not be displayed properly.
– The displayed resolution may vary, depending on the PC system settings and cables.
■ Check the following.
Caution
• When the product makes popping (cracking) sound.
– The sound may be caused by contraction or expansion from temperature change of external components
or internal circuit of the product.
– This is NOT a product failure and does not affect the life of the product.
Installation issue
• Blank spaces are found on all four sides of the screen when an HDMI or HDMI-DVI cable is connected to the
product and PC.
– The blank spaces found on the screen have nothing to do with the product.
– Blank spaces on the screen are caused by the PC or graphics card. To resolve the problem, adjust the
screen size in the HDMI or DVI settings for the graphics card.
– If the graphics card settings menu does not have an option to adjust the screen size, update the graphics
card driver to the latest version. (Please contact the graphics card or PC manufacturer for further details
about how to adjust the screen settings.)
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LCD Monitor
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