LG UltraWide 34WQ60A Owner's Manual page 24

Do you see an "Unrecognized monitor, Plug and Play (VESa DDC) monitor found" message?
Have you installed the display driver?
No sound from the headphone port.
Are images displayed without sound?
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Be sure to install the display driver from our web site: http://www.lg.com.
• Make sure to check if the graphics card supports Plug and Play function.
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Make sure that the headphone port connections are made properly.
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Try increasing the volume with the joystick.
•
set the audio output of the PC to the monitor you are using. (The settings may differ depending on the operating system (Os) you use.)