LG 17MB15T Owner's Manual page 22

Troubleshooting
Display image is incorrect
G
The screen color is
mono or abnormal.
G
The screen blinks.
• Check if the signal cable is properly connected
and use a screwdriver to fasten if necessary.
• Make sure the video card is properly inserted in
the slot.
• Set the color setting higher than 24 bits (Color
Quality) at Control Panel --> Settings.
• Check if the screen is set to interlace mode and if
yes, change it to the recommend resolution.
A21