LG 27UP550N Owner's Manual page 25

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?
NOTE
•
LED can be lighted with Set OSD Menu.
Settings – General – Power LED – On
•
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.
•
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.)
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