LG 49UT640S Series Owner's Manual page 21

• The TV turns off suddenly.
- Check the power control settings. The power supply may be
interrupted.
- Check if the auto-off function is activated on the settings related
time.
- If there is no signal while the TV is on, the TV will turn off
automatically after 15 minutes of inactivity.
• When connecting to the PC (HDMI), no signal is detected.
- Turn the TV off/on using the remote control.
- Reconnect the HDMI cable.
- Restart the PC with the TV on.
Abnormal display
• If the product feels cold to the touch, there may be a small "flicker"
when it is turned on. This is normal, there is nothing wrong with
product.
• This panel is an advanced product that contains millions of pixels.
You may see tiny black dots and/or brightly coloured dots (red, blue
or green) at a size of 1 ppm on the panel. This does not indicate a
malfunction and does not affect the performance and reliability of the
product. This phenomenon also occurs in third-party products and is
not subject to exchange or refund.
• You may find different brightness and colour of the panel depending
on your viewing position(left/right/top/down). This phenomenon
occurs due to the characteristic of the panel. It is not related with the
product performance, and it is not malfunction.
• Displaying a still image for a prolonged period of time may cause
image sticking. Avoid displaying a fixed image on the TV screen for a
long period of time.
Generated sound
• "Cracking" noise: A cracking noise that occurs when watching or
turning off the TV is generated by plastic thermal contraction due to
temperature and humidity. This noise is common for products where
thermal deformation is required.
• Electrical circuit humming/panel buzzing: A low level noise is
generated from a high-speed switching circuit, which supplies a large
amount of current to operate a product. It varies depending on the
product. This generated sound does not affect the performance and
reliability of the product.
• When cleaning the product, be careful not to allow any liquid
or foreign objects to enter the gap between the upper, left
or right side of the panel and the guide panel. (Depending
on model)
• Make sure to wring any excess water or cleaner from the
cloth.
• Do not spray water or cleaner directly onto the TV screen.
• Make sure to spray just enough of water or cleaner onto a dry
cloth to wipe the screen.
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