LG 55LW9800 Owner's Manual page 121

Problem
An image displays in black and white or
the color quality is poor.
Horizontal or vertical bars appears or
images blur
Lines or streaks appear on images.
Afterimages (ghosts) appear when the
product turns off
The power is on but the screen appears
extremely dark.
No Signal appears on the screen.
Black spots appear on the screen.
The display offset is wrong.
Thin lines appear in the background of
the screen.
Horizontal noises appear or characters
blur.
The reception on some channels is poor.
Problem
The file does not appear on the Movie
List.
Message is displayed saying This file is
invalid or the audio is working normally
but the video is not working normally.
Message is displayed saying
Unsupported Audio or the video is
working normally but the audio is not
working normally.
Subtitle is not working.
Adjust the color setting in the menu option.
Keep a sufficient distance between this product and other electronic products.
Scroll to other channels. There may a problem with the broadcast.
Check if there are local interferences such as an electrical appliance or power tool.
Check the antenna or aim the antenna to the proper direction.
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.
Adjust the brightness and contrast in the menu option.
Check if the signal cable is connected between the TV and products properly.
Check the selected input source by pressing INPUT.
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.
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.
Check the video cable connections.
Adjust the Phase setting in the menu option. Refer to the SCREEN (RGB-PC) .
Scroll to other channels. 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 interference such as an electrical appliance or power tool.
Check whether the extension is supported.
Check whether the file is playing normally on a PC. (Check whether the file is
damaged.)
Check whether the resolution is supported.
Check whether the video/audio codec is supported.
Check whether the frame rate is supported.
Check whether the file is playing normally on a PC. (Check whether the file is
damaged.)
Check whether the audio codec is supported.
Check whether the bit rate is supported.
Check whether the sample rate is supported.
Check whether the file is playing normally on a PC. (Check whether the file is
damaged.)
Check whether the video file and subtitle file name are the same.
Check whether the video file and subtitle file are located in the same folder.
Check whether the subtitle file is supported.
Check whether the language is supported. (When you open the subtitle file in
Memo Pad, you can check the language of the subtitle file.)
Resolution
Resolution