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Do you see an "Unrecognized monitor, Plug and Play (VESA DDC) monitor found" message?
Have you installed the display driver?  • 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.
No sound from the headphone port.
Are images displayed without sound?  • Make sure that the headphone port connections are made properly.
 • 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.)
 NOTE
 • LED can be lighted with Set OSD Menu. 
Settings – General – Power LED – On