LG 20MT48AF Owner's Manual page 27

Video
An image displays in black and white or the color quality is
poor.
• Adjust the color setting in the menu option.
• Keep a sufficient distance between this product and other
electronic products.
• Scroll to other programme. There may a problem with the
broadcast.
Horizontal or vertical bars appears or images blur.
• Check if there are local interferences such as an electrical appliance
or power tool.
Lines or streaks appear on images.
• Check the antenna or aim the antenna to the proper direction.
Afterimages (ghosts) appear when the product turns off.
• Pixels may have been damaged from a fixed image displayed for
a long time (image burn). Use a screen saver to prevent the pixel
damage on the screen.
The power is on but the screen appears extremely dark.
• Adjust the brightness and contrast in the menu option.
"No Signal" appears on the screen.
• Check if the signal cable is connected between the TV and products
properly.
• Check the selected input source by pressing INPUT.
Black spots appear on the screen.
• Several pixels in red, green, white, or black may appear on the
screen that can attribute to the characteristics of the panel.
• This is normal.
The display offset is wrong.
• Adjust the position setting in the Picture menu.
• Check if the video card resolution and frequency are supported
by the product. If the frequency is out of range, set to the
recommended resolution using the display settings on the
external device.
Thin lines appear in the background of the screen.
• Check the video cable connections.
The reception on some programme is poor.
• Scroll to other programme. There may a problem with the
broadcast.
• The station signal may be weak. Aim the antenna to the proper
direction.
• Check if there is local interferences such as an electrical appliance
or power tool.
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