LG L246WH User Manual page 21

On Screen Display(OSD) Selection and Adjustment
HDMI
Note
When the Interlace Signal is inputted at the RGB source input level, the Auto-
Configure, Clock, Phase and Position menu can't be used.
Screen Adjustment
Video : Used when it is connected with DVD or SET-TOP BOX through HDMI.
If you want to connect VCR, select VIDEO in this menu.
Otherwise, you may see noise in the margin of the screen due to the
difference in the screen size .
PC : Used when it is connected with PC through HDMI.
If you want to connect PC, select PC in this menu.
Otherwise, the screen may be too large to support PC sub screen
A20