LG 55XE4F Owner's Manual page 42

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Issues Related to Sound
• There is no sound output.
- See if the audio cable is connected properly.
- Adjust the volume of the product or external device.
- See if the sound is set properly.
• Sound is too dull.
- Select the appropriate equalizer sound.
• Sound is too low.
- Adjust the volume of the product or external device.
• For some models, you will need to purchase external speakers separately since they do not have speakers built-in.
Other Issues
• The power suddenly turned off.
- Check if the auto-off function is activated on the settings related time.
- Power source has not being supplied properly. See if the product power cord is connected properly.
- Check the power control settings.
- If the internal temperature of the enclosure rises, the power may shut down. Make sure to regularly clean the heat
exchanger within the enclosure.
Image sticking
• After-image appears when the product is turned off.
- If you use a fixed image for a long time, the pixels may be damaged. Use the screen-saver function.
- When a dark image is displayed on the screen after an image with high contrast (black and white or gray), this may
cause image sticking. This is normal for display products.
• When the LCD panel displays a static image for an extended period of time, it can cause a voltage difference between
the electrodes that operate the liquid crystals. When the voltage difference between the electrodes builds up over
time, liquid crystals have a tendency to remain aligned in one direction. During this process, a previously displayed
image remains visible. This phenomenon is referred to as image sticking.
• Image sticking does not occur when using constantly changing images but may occur when using a fixed image for an
extended period of time. Therefore, it is recommended that you use the instructions below to decrease the likelihood
of image sticking occurring when using a fixed image. It is recommended that you change the screen at least once
every 12 hours at the very minimum; if done more frequently, the prevention of image sticking is more effective.