LG L226WA-WN User Manual page 18

Adjusting Screen Colour
* When HDMI is connected to a set-top box or video player like a
DVD player, please select HDMI PC in the screen adjustment of
the OSD to start CSM for 720P @ 60 Hz, 480P @ 60 Hz .
* 720P @ 60 Hz, 480P @ 60 Hz is equivalent to PC Timing
1280x720 @ 60 Hz, 640x480 @ 60 Hz.
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