LG UN570H Series 55" UHD 4K HDR Commercial Hospitality TV - Manual (Page 30)

18
ENGLISH
- This panel is an advanced product that contains
millions of pixels. In a very few cases, you could
see fine dots on the screen while you’re viewing
the TV. Those dots are deactivated pixels and
do not affect the performance and reliability of
the TV.
- Displaying a still image for a prolonged period
of time may cause an image sticking. Avoid
displaying a fixed image on the TV screen for a
extended length 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 upon 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 upon 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.
Troubleshooting
The software may be updated for improvement in
performance. The customer is responsible to ensure
the compatibility of their equipment with any LG
Electronics software. If needed, please consult with
LG Electronics and update new software versions
according to the guidance provided by LG Electronics.
• Cannot control the TV with the remote control.
- Check if anything such as tape has been placed
over the receiver.
- Check if there is any obstacle between the
product and the remote control.
- Replace the batteries with new fresh ones.
• No image display and no sound is produced.
- Check if the product is turned on.
- Check if the power cord is connected to a wall
outlet.
- Check if there is a problem in the wall outlet by
connecting other products.
• 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 TV feels cold to the touch, there may be a
small flicker when it is turned on. This is normal;
there is nothing wrong with TV. Some minute dot
defects may be visible on the screen, appearing
as tiny red, green, or blue spots. However, they
have no adverse effect on the TV’s performance.
Avoid touching the LCD screen or holding your
finger(s) against it for long periods of time. Doing
so may produce some temporary distortion
effects on the screen.