LG 58UF830V Owner's Manual page 6

Do not press strongly upon the panel with a hand or sharp object such
as nail, pencil or pen, or make a scratch on it, as it may cause damage
to screen.
Avoid touching the screen or holding your finger(s) against it for long
periods of time. Doing so may produce some temporary or permanent
distortion/damage to screen.
When cleaning the product and its components, unplug the power
first and wipe it with a soft cloth. Applying excessive force may cause
scratches or discolouration. Do not spray with water or wipe with a wet
cloth. Never use glass cleaner, car or industrial shiner, abrasives or wax,
benzene, alcohol etc., which can damage the product and its panel.
Otherwise, this may result in fire, electric shock or product damage
(Deformation, corrosion or breakage).
As long as this unit is connected to the AC wall outlet, it is not
disconnected from the AC power source even if you turn off this unit
by SWITCH.
When unplugging the cable, grab the plug and unplug it, by pulling at
the plug.
Don't pull at the cord to unplug the power cord from the power board,
as this could be hazardous.
When moving the product, make sure you turn the power off first. Then,
unplug the power cables, antenna cables and all connecting cables.
The TV set or power cord may be damaged, which may create a fire
hazard or cause electric shock.
6
When moving or unpacking the product, work in pairs because the
product is heavy. Otherwise, this may result in injury.
Contact the service centre once a year to clean the internal parts of the
product.
Accumulated dust can cause mechanical failure.
Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as power
supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
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.
The panel is a high technology display product with resolution of two
million to six million 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.