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OWNER'S MANUAL
IPS LED MONITOR
(LED MONITOR*)
*LG LED Monitors are LCD Monitors with LED Backlighting.
Please read the safety information carefully before using the product.
IPS LED Monitor (LED Monitor) Model List
27UK850
27BK85U
www.lg.com
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Contents
ENGLISH
ENG
CONTENTS
3 LICENSE
4 ASSEMBLING AND PREPARING
4 Product Components
5 Supported Drivers and Software
6 Component and Button Description
6 - How to Use the Joystick Button
7 Input Connector
8 Moving and Lifting the Monitor
9 Installing the Monitor
9 - Assembling the stand base
10 - Using the cable holder
11 - Installing onto a table
12 - Adjusting the angle
12 - Adjusting the Stand Height
13 - Pivot Feature
14 - Using the Kensington lock
15 - Detaching the Stand Body
15 - Installing the wall mount plate
15 - Installing to a wall
20 USER SETTINGS
20 Activating the Main Menu
20 - Main Menu Features
21 User Settings
21 - Menu Settings
26 TROUBLESHOOTING
28 SPECIFICATIONS
28 27UK850/27BK85U
29 Factory Support Mode (Preset Mode, PC)
29 HDMI
29 DisplayPort / USB-C
30 HDMI Timing (Video)
30 Power LED
17 USING THE MONITOR
17 Connecting to a PC
17 - HDMI connection
17 - DisplayPort connection
18 - USB-C connection
18 Connecting to AV Devices
18 - HDMI connection
19 Connecting Peripherals
19 - USB Cable connection - PC
19 Connecting to External Devices
19 - Connecting Headphones
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LICENSE
Each model has different licenses. Visit www.lg.com for more information on the license.
The terms HDMI and HDMI High-Definition Multimedia Interface, and the HDMI Logo
are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
VESA, VESA logo, DisplayPort compliance logo and DisplayPort compliance logo for
dual-mode source devices are all registered trademarks of the Video Electronics Standards Association.
MaxxAudio and additional MAXX trademarks are trademarks and/or registered trademarks of Waves Audio Ltd.
The SuperSpeed USB Trident logo is a registered trademark of USB Implementers
Forum, Inc.
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USB Type-C
The following content is only applied to the monitor which is sold in Europe market and which needs to meet the ErP
Directive:
* This monitor is set to be turned off automatically in 4 hours after you turned on display if there is no adjustment to
display.
* To make this setting be disabled, change the option to ‘Off’ in OSD menu of “Automatic Standby”.
TM
and USB-CTM are trademarks of USB Implementers Forum.
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4
ASSEMBLING AND PREPARING
Product Components
Please check whether all the components are included in the box before using the product. If there are missing components, contact the retail store where you purchased the product. Note that the product and components may look
different from those shown here.
CD / Card
HDMI Cable
( Depending on the coun-
try )
Stand Body
CAUTION
Power Cord AC-DC Adapter
( Depending on the country )
DisplayPort Cable
Stand Base Cable Holder
USB C-C cable
Always use genuine components to ensure safety and product performance.
y
The product warranty will not cover damage or injury caused by the use of counterfeit components.
y
It is recommend that use the supplied components.
y
If you use generic cables not certified by LG, the screen may not display or there may be image noises.
y
NOTE
Note that the components may look different from those shown here.
y
Without prior notice, all information and specifications in this manual are subject to change to improve the
y
performance of the product.
To purchase optional accessories, visit an electronics store or online shopping site or contact the retail store
y
where you purchased the product.
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Supported Drivers and Software
You can download and install the latest version from the LGE website (www.lg.com).
Drivers and Software Installation Priority 27UK850/27BK85U
Monitor Driver Recommended O
OnScreen Control Recommended O
Dual Controller Optional O
True Color Pro Optional O
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6
Component and Button Description
Joystick Button
Power LED
On: power is on
y
Off: power is off
y
How to Use the Joystick Button
You can easily control the functions of the monitor by pressing the joystick button or moving it left/right with your
finger.
Basic Functions
Press the joystick button once with your finger to turn on the
monitor.
Press and hold the joystick button once with your finger to turn off the
monitor.
You can control the volume by moving the joystick button left/right.
◄/►
Power on
Power off
Volume
Control
NOTE
The joystick button is located at the bottom of the monitor.
y
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Input Connector
7
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Moving and Lifting the Monitor
When moving or lifting the monitor, follow these instructions to prevent the monitor from being scratched
or damaged and to ensure safe transportation regardless of its shape or size.
It is advisable to place the monitor in the original
y
box or packing material before attempting to
move it.
Before moving or lifting the monitor, disconnect
y
the power cord and all cables.
Hold the top and bottom of the monitor frame
y
firmly. Do not hold the screen itself.
CAUTION
As far as possible, avoid touching the monitor
y
screen. This may result in damage to the screen or
some of the pixels used to create images.
If you use the monitor panel without the stand
y
base, its joystick button may cause the monitor to
become unstable and fall, resulting in damage to
the monitor or human injury. In addition, this may
cause the joystick button to malfunction.
When holding the monitor, the screen should face
y
away from you to prevent it being scratched.
When moving the monitor, avoid any strong shock
y
or vibrations to the product.
When moving the monitor, keep it upright, never
y
turn the monitor on its side or tilt it sideways.
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Installing the Monitor
2
Assembling the stand base
Please put a soft cloth on a low table or box to
1
protect the screen of the monitor.
Please put the monitor on the soft cloth with the
2
screen facing down.
Turn the screw clockwise to secure the stand base.
4
Cable Holder
CAUTION
9
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Assemble the Head and Stand body.
1
3
Stand Body
Assemble the Stand body and Stand base .
To avoid injury to your fingers or feet when you
y
Assembly the Stand Body and Base, you should
hold the Stand Base firmly.
NOTE
Press the stand until the button reaches the top.
y
Stand Body
Stand Base
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CAUTION
Illustrations in this document represent typical
y
procedures, so they may look different from the
actual product.
Do not carry the monitor upside down by just
y
holding the stand base. This may cause the
monitor to fall off the stand and could result in
personal injury.
When lifting or moving the monitor, do not
y
touch the monitor screen. The force applied to
the monitor screen may cause damage to it.
Do not apply foreign substances (oils, lubricants,
y
etc.) to the screw parts when assembling the
product. (Doing so may damage the product.)
Applying excessive force when tightening screws
y
may cause damage to the monitor. Damage
caused in this way will not be covered by the
product warranty.
Using the cable holder
Arrange the cables using the cable holder as shown in
the illustration.
NOTE
You can disassemble the stand in the reverse
y
order of the assembly.
Cable Holder
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11
Installing onto a table
Lift the monitor and place it on the table in an up-
1
right position.
Place at least 100 mm (3.94 inches) away from the
wall to ensure sufficient ventilation.
100 mm
(3.94 inches)
100 mm
(3.94 inches)
Connect the Power cord to the monitor, then plug
2
the power cord into the wall outlet.
100 mm
(3.94 inches)
100 mm
(3.94 inches)
Cautions When Connecting Power Cord
100-240 V ~
Make sure to use the power cord that is pro-
y
vided in the product package and connect it to a
grounded power outlet.
If you need another power cord, please contact
y
your local dealer or the nearest retail store.
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Press the joystick button on the bottom of the
3
monitor to turn on the monitor.
CAUTION
Unplug the power cord prior to moving or install-
y
ing the monitor. There is risk of electric shock.
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Adjusting the angle
Place the monitor in an upright position, mounted
1
on the stand base.
Adjust the angle of the screen. The angle of the
2
screen can be adjusted forwards or backwards for a
comfortable viewing experience.
20° -5°
Front SideRear Side
WARNING
Adjusting the Stand Height
Handle the monitor with both hands for safety.
1
The height can be adjusted up to 110.0 mm(4.33
2
inches).
110.0 mm(4.33 inches)
WARNING
To avoid injury to the fingers when adjusting the
y
screen, do not hold the lower part of the monitor's frame as illustrated below.
Be careful not to touch or press the screen area
y
when adjusting the angle of the monitor.
Do not put your fingers or hand
y
between the screen and the base
(chassis) when adjusting the
screen's height.
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Pivot Feature
The pivot feature allows the monitor to rotate 90°
clockwise.
Head
Stand
WARNING
To avoid scratching the stand base, make sure
y
that when rotating the monitor using the pivot
feature, the stand does not make contact with
the monitor.
Rotate the monitor clockwise as shown in the figure.
3
Complete the installation by rotating the monitor
4
90° as shown below.
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Raise the monitor to the maximum height.
1
Adjust the angle of the monitor in the direction of
2
the arrow as shown in the figure.
NOTE
Auto Pivot feature of the display is not supported.
y
The screen can be rotated easily using the screen
y
pivot shortcut key provided with your Windows
operating system. Note that some Windows
versions and some graphics card drivers may use
different settings for the screen pivot key or may
not support the pivot key at all.
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WARNING
Take care when rotating the monitor if the cable
y
is connected.
To avoid injury when rotating the display, do not
y
place your fingers between the display and the
stand base.
Using the Kensington lock
The Kensington security system connector is located at
the back of the Monitor set.
For more information on installation and usage, refer to
the Kensington lock user manual or visit the website at
http://www.kensington.com.
NOTE
The left or right side of the monitor head can be
y
slightly rotated up or down (up to 3°). Adjust the
horizontal level of the monitor head.
Monitor head
Connect the Kensington security system cable between
the Monitor set and a table.
NOTE
Use of the Kensington lock is optional.
y
The accessories can be purchased at your local
electronics store.
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Detaching the Stand Body
Place the monitor’s screen face down. To protect the
1
screen from scratches, cover the surface with a soft
cloth.
Remove the stand from the monitor by pressing
2
the button on the bottom center of the back of the
monitor.
Installing to a wall
Install the monitor at least 100 mm (3.94 inches) away
from the wall and leave about 100 mm (3.94 inches)
of space at each side of the monitor to ensure sufficient ventilation. Detailed installation instructions can
be obtained from your local retail store. Please refer to
the manual to install and set up a tilting wall mounting
bracket.
100 mm
(3.94 inches)
100 mm
(3.94 inches)
100 mm
(3.94 inches)
To install the monitor to a wall, attach a wall mounting
bracket (optional) to the back of the monitor.
Make sure that the wall mounting bracket is securely fixed
to the monitor and to the wall.
100 mm
(3.94 inches)
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Installing the wall mount plate
This monitor supports the specification of the standard
wall mount plate or compatible device.
Place the screen face down. To protect the screen
1
from scratches, cover the surface with a soft cloth.
Place the wall mount plate onto the monitor and
2
align it with the screw holes.
Tighten the four screws to fix the plate to the moni-
3
tor using a screwdriver.
NOTE
The wall mount plate is sold separately.
y
For more information on installation, refer to the
y
wall mount plate's installation guide.
Be careful not to use excessive force when
y
mounting the wall mount plate, as this can damage the monitor's screen.
1 If you use screw longer than standard, the monitor
might be damaged internally.
2 If you use improper screw, the product might be dam-
aged and drop from mounted position.
In this case, LG Electronics is not responsible for it.
Wall Mount (A x B) 100 x 100
Standard screw M4 x L10
Number of screws 4
Wall Mount Plate
(Optional)
LSW 149
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Wall Mount (A x B)
y
A
B
CAUTION
Unplug the power cord before moving or install-
y
ing the monitor to avoid electric shocks.
Installing the monitor on the ceiling or on a
y
slanted wall may result in the monitor falling off,
which could lead to injury. Please use the genuine LG wall mounting bracket. For more information, contact your local retail store or a qualified
installer.
Applying excessive force when fastening screws
y
may cause damage to the monitor. Damage
caused in this way will not be covered by the
product warranty.
Use the wall mounting bracket and screws
y
that conform to the VESA standard. Damage
caused by the use or misuse of inappropriate
components will not be covered by the product
warranty.
Screw length from outer surface of back cover
y
should be under Max. 8mm(0.31inches).
Wall mount Pad
NOTE
Use the screws specified by the VESA standard.
y
The wall mount kit includes the installation guide
y
and all necessary parts.
The wall mounting bracket is optional. The acces-
y
sories can be purchased at your local retail store.
The length of the screw may differ for each wall
y
mounting bracket. Ensure the correct length
screw is used.
For more information, please refer to the user
y
manual for the wall mounting bracket.
Wall mount Pad
Back Cover
Standard screw
Max. 8mm(0.31inches)
Back Cover
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USING THE MONITOR
Connecting to a PC
This monitor supports the *Plug and Play feature.
y
*Plug and Play: A feature that allows you to add
a device to your computer without having to
reconfigure anything or install any manual drivers.
HDMI connection
Transmits the digital video and audio signals from your
PC and A/V devices to the monitor. Connect your PC
and AV device to the monitor with the HDMI cable as
illustrated below.
Press the menu button and then select the input option
from the input menu.
DisplayPort connection
Transmits the digital video and audio signals from your
PC to the monitor. Connect your PC to the monitor using the Displayport cable as illustrated below.
Press the menu button and then select the input option
from the input menu.
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ENG
NOTE
If you use HDMI PC, it can cause compatibility
y
problem.
Use a certified cable with the HDMI logo attached.
y
If you do not use a certified HDMI cable, the
screen may not display or a connection error may
occur.
Recommended HDMI cable types
y
- High-Speed HDMI®/TM Cable
- High-Speed HDMI®/TM Cable with Ethernet
NOTE
There may be no video or audio output depending
y
on the DP version of the PC.
If you use generic cables not certified by LG, the
y
screen may not display or there may be image
noises.
For using Mini DP to DP (Mini DisplayPort to
y
DisplayPort) cable, it is recommended that you use
DisplayPort 1.2 cable.
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USB-C connection
Transmits digital video and audio signals from your PC
to the monitor.
Connect the monitor to your PC using the USB-C cable
as shown in the illustration below.
Press the menu button and then select the input option
from the input menu.
(USB C-C cable)
NOTE
Connecting to AV Devices
HDMI connection
Transmits the digital video and audio signals from your
PC and A/V devices to the monitor. Connect your PC
and AV device to the monitor with the HDMI cable as
illustrated below.
Press the menu button and then select the input option
from the input menu.
PD(Power Delivery) and DP Alternate Mode(DP
y
over USB-C) are supported via USB-C Port.
Features may not work properly depending on
y
the connected device’s specifications and the
environment.
USB-C port is not for the Monitor Power source
y
but for a PC power source.
Connect Adapter to supply power to the Monitor
NOTE
Use a certified cable with the HDMI logo attached.
y
If you do not use a certified HDMI cable, the
screen may not display or a connection error may
occur.
Recommended HDMI cable types
y
- High-Speed HDMI®/TM Cable
- High-Speed HDMI®/TM Cable with Ethernet
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Connecting Peripherals
USB Cable connection - PC
The USB port on the product functions as a USB hub.
(sold separately)
(sold separately)
NOTE
Make sure to install the most recent Windows OS
y
service pack before using the product.
Peripheral devices are sold separately.
y
A keyboard, mouse, or USB device can be
y
connected to the USB port.
To use USB Downstream port of monitor, user
y
must connect Upstream port of monitor to Host
PC using USB C-C or USB C-A cable.
When the USB C-C cable is connected between
y
Upstream port of monitor and Host PC, the
Downstream port of monitor support USB 2.0
device.
When the USB C-A cable is connected between
y
Upstream port of monitor and Host PC, the
Downstream port of monitor support USB 3.0
device.
However, Host PC must support USB 3.0 function.
Connecting to External Devices
Connecting Headphones
Connect peripherals to the monitor via the headphones
port. Connect as illustrated.
(sold separately)
NOTE
Peripheral devices are sold separately.
y
If you use angled earphones, it may cause a prob-
y
lem with connecting another external device to
the monitor. Therefore, it is recommended to use
straight earphones.
Angled Straight
Depending on the audio settings of the PC and
y
external device, headphones and speaker functions
may be limited.
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CAUTION
Cautions When Using a USB Device
A USB device with an automatic recognition
y
program installed, or that uses its own driver, may
not be recognized.
Some USB devices may not be supported or may
y
not work properly.
It is recommended to use a USB hub or hard disk
y
drive with power supplied. (If the power supply
is not adequate, the USB device may not be
recognized properly.)
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USER SETTINGS
Activating the Main Menu
Press the joystick button on the bottom of the monitor.
1
To view the settings menu, press the joystick button at the bottom of the monitor and then enter the Settings.
2
Move the joystick up/down (▲/▼) and left/right(◄/►) to set the options.
3
Press the joystick button once more to exit the main menu.
4
Joystick Button
Button Menu Status Description
Main menu disabled Enables the main menu.
Main menu enabled
Main menu disabled Adjusts the monitor volume level.
◄
Main menu enabled Enters the Input feature.
Main menu disabled Adjusts the monitor volume level.
►
Main menu enabled Enters the Settings features.
Main menu disabled Displays information on the current input.
▲
Main menu enabled Turns off the monitor.
Main menu disabled Displays information on the current input.
▼
Main menu enabled Enters the Game features.
Exits the main menu.
(Holding down the button to turn off the monitor. You can turn off the
monitor this way at any time, including when the OSD is on.)
Main Menu Features
Power Off
Input Exit
Game
Settings
Main Menu Description
Input Sets input mode.
Power Off Turns off the monitor.
Settings Configures the screen settings.
Game Sets the game mode for gaming.
Exit Exits the main menu.
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User Settings
Menu Settings
To view the settings menu, press the joystick button at the bottom of the monitor and then enter the settings.
1
Configure the options by moving the joystick up/down/left/right.
2
To return to the upper settings or set other settings items, move the joystick to◄or press ( ).
3
If you want to exit the settings menu, move the joystick to◄until you exit.
4
When you enter the menu, instructions on how to use the button will appear in the bottom right corner of the screen.
y
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Quick Settings
Input
Picture Sound General
CAUTION
Your monitor’s OSD (On Screen Display) may differ slightly from that shown in this manual.
y
Each option is described below.
Settings > Quick Settings Description
Brightness
Contrast
Volume Adjusts the volume level.
Adjusts the color contrast and brightness of the screen.
NOTE
You can adjust Mute / Unmute by moving the joystick button to▼in the Volume menu.
y
Color Temp
MaxxAudio On MaxxAudio® by waves, recipient of a Technical GRAMMY Award® is a suite of studio-
Settings > Input Description
Input List Selects the input mode.
Aspect Ratio Adjusts the aspect ratio of the screen.
Custom
Warm Sets the screen color to a reddish tone.
Medium Sets the screen color between a red and blue tone.
Cool Sets the screen color to a bluish tone.
Off Disables the MaxxAudio function.
Full Wide Displays the video in wide-screen, regardless of the video signal input.
Original Displays video according to the aspect ratio of the video signal input.
1:1 The aspect ratio is not adjusted from the original.
The user can adjust it to red, green, or blue by customization.
quality sound tools for a superior listening experience.
NOTE
The display may look the same for Full Wide , Original, and 1:1 options at the recommended resolu-
y
tion (3840 x 2160).
There is no 1:1 menu on FreeSync Mode. ( Go to Picture → Game Adjust → FreeSync, to set from
y
FreeSync Basic or Extended to Off)
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Picture Mode on SDR(Non-HDR) signal.
Settings > Picture Description
Picture Mode Custom Allows the user to adjust each element. The color mode of the main menu can be
adjusted.
Reader Optimizes the screen for viewing documents. You can brighten the screen in the OSD
menu.
Photo Optimizes the screen for photos.
Cinema Optimizes the screen for video.
HDR Effect Optimizes the screen for high dynamic range.
Dark Room 1 This mode adjusts the brightness to the optimal level for working in a dark environ-
ment.
Dark Room 2 This mode sets the brightness to a lower level than Dark Room 1.
Color Weakness This mode is for users who cannot distinguish between red and green. It enables users
with color weakness to easily distinguish between the two colors.
FPS Game 1 This mode is optimized for FPS games.
FPS Game 2 It has a higher Black Stabilizer value than FPS Game 1. It is suitable for very dark FPS
games.
RTS Game This mode is optimized for RTS Game.
Custom (Game) In this mode, users can customize various elements including game-related options.
EBU A standard TV PAL color space for broadcasting.
REC709 A standard HDTV color space for broadcasting.
SMPTE-C A standard TV NTSC color space for broadcasting.
Calibration 1 Adjusts to the last calibrated screen.
Calibration 2 Adjusts to the previously calibrated screen.
NOTE
If the picture mode is changed, the screen may flicker or the resolution of your PC screen may be affected.
y
Calibration 2 : Installation of TRUE COLOR PRO and proceeding Calibration will enable this menu.
y
Picture Mode on HDR signal.
Settings > Picture Description
Picture Mode HDR Vivid Optimized the screen for HDR vivid colors.
HDR Standard Optimized the screen for HDR.
HDR Game Optimized the screen for HDR Games.
HDR Cinema Optimized the screen for HDR video.
NOTE
HDR content may not be operated properly depending on the Windows10 OS setting. Please check the HDR On /
y
Off setting of Windows.
When the HDR function is turned on, the characters or picture quality may be poor according to Graphic card
y
performance.
While the HDR function is on, screen flickering or cracking may occur when changing the monitor input or power
y
on/off according to Graphic card performance.
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Picture Adjust Brightness Adjusts the brightness of the screen.
Contrast Adjusts the contrast of the screen.
Sharpness Adjusts the sharpness of the screen.
SUPER
RESOLUTION+
High Optimized picture quality is displayed when a user wants crystal clear images. It
is effective for high quality video or game.
Middle The optimized picture quality is displayed when a user wants images between
low and high modes for comfortable viewing. It is effective for UCC or SD video.
Low The optimized picture quality is displayed when a user wants smooth and natural im-
ages. It is effective for slow-moving pictures or still images.
Off Select this option for everyday viewing. SUPER RESOLUTION+ is turned off in
this mode.
NOTE
Because this is a function to increase the sharpness of low resolution pictures, it is not
y
recommended to use the function for normal text or for desktop icons. Doing so may
result in unnecessarily high sharpness.
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Black Level Sets the offset level (for HDMI only).
HDMI ULTRA HD
Deep Color
yOffset: as a reference for a video signal, this is the darkest color the monitor can display.
High Keeps the current contrast ratio of the screen.
Low Lowers the black levels and raises the white levels from the current contrast
Provides sharper images when connected to a device supporting ULTRA HD Deep Color.
3840 x 2160
3840 x 2160
ratio of the screen.
4K@60 Hz Support Format (HDMI ULTRA HD Deep Color On)
Resolution
4K@30 Hz Support Format (HDMI ULTRA HD Deep Color Off)
Resolution
Frame rate
(Hz)
59.94
60.00
Frame rate
(Hz)
29.97
30.00
NOTE
If the connected device does not support ULTRA HD Deep Color, the feature may not
y
work properly.
If a problem occurs, set the HDMI ULTRA HD Deep Color option to Off.
y
HDMI ULTRA HD Deep Color option must be set for each HDMI port (HDMI IN 1, HDMI
y
IN 2) separately.
HDMI ULTRA HD Deep Color option can be changed with SET OSD Menu.
y
(Settings - Picture - Picture Adjust - HDMI ULTRA HD Deep Color Off / On)
Color Depth / Chroma Sampling
8 bit 10 bit
YCbCr 4:2:0
YCbCr 4:2:2
YCbCr 4:4:4 -
RGB -
Color Depth / Chroma Sampling
8 bit 10 bit
YCbCr 4:2:2
YCbCr 4:4:4 -
RGB -
DFC On
Off
Adjusts the brightness automatically according to the screen.
Disables the DFC feature.
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Game Adjust Response Time Sets a response time for displayed pictures based on the speed of the screen.
FreeSync Provides seamless and natural images by synchronizing the vertical frequency of the input
For a normal environment, it is recommended that you use Fast.
For a fast-moving picture, it is recommended that you use Faster.
Setting to Faster may cause image sticking.
Faster Sets the response time to faster.
Fast Sets the response time to fast.
Normal Sets the response time to normal.
Off Does not use the response time improvement feature.
signal with that of the output signal.
CAUTION
Supported Interface: DisplayPort, HDMI
y
Supported Graphic Card: A graphic card that supports AMD’s FreeSync is necessary.
y
Supported Version: Make sure to update the graphic card to the latest driver.
y
For more information and requirement, refer to AMD website at http://www.amd.com/
y
FreeSync
Extended Enable wider frequency range of FreeSync function than basic mode.
Basic Enable basic frequency range of FreeSync function.
Off FreeSync function off.
Black Stabilizer You can control the black contrast to have better visibility in dark scenes.
Color Adjust Gamma Mode 1, Mode 2,
Color Temp Custom The user can adjust it to red, green, or blue by customization.
Red You can customize the picture color using Red, Green, and Blue colors.
Green
Blue
Six Color Meets the user requirements for colors through adjusting the color and saturation of the six
Picture Reset
Do you want to Picture reset your settings?
No Cancel the select.
Yes Returns to the default settings.
Increasing the Black Stabilizer value brightens the low gray level area on the screen. (You
can easily distinguish objects on dark game screens.)
Reducing the Black Stabilizer value darkens the low gray level area and increases the dynamic contrast on the screen.
Mode 3
Mode 4 If you do not need to adjust the gamma settings, select Mode 4.
Warm Sets the screen color to a reddish tone.
Medium Sets the screen color between a red and blue tone.
Cool Sets the screen color to a bluish tone.
colors (Red_Hue, Red_Saturation, Green_Hue, Green_Saturation, Blue_Hue, Blue_Saturation, Cyan_Hue, Cyan_Saturation, Magenta_Hue, Magenta_Saturation, Yellow_Hue,
Yellow_Saturation) and saving the settings.
Hue Adjusts the tone of the screen colors.
Saturation Adjusts the saturation of the screen colors. The lower the value, the less
The screen may flicker during the game play.
The higher the gamma value, the darker the image becomes. Likewise,
the lower the gamma value, the lighter the image becomes.
saturated and brighter the colors become. The higher the value, the more
saturated and darker the colors become.
Page 25
Settings > Sound Description
Volume Adjusts the volume level.
NOTE
You can adjust Mute / Unmute by moving the joystick button to▼in the Volume menu.
y
MaxxAudio On MaxxAudio® by waves, recipient of a Technical GRAMMY Award® is a suite of studio-
Off Disables the MaxxAudio function.
Settings > General Description
Language Sets the menu screen to the desired language.
SMART ENERGY
SAVING
Power LED Turns the power LED on the bottom of the monitor on or off.
Automatic Standby Feature that automatically turns off the monitor when there is no movement on the screen for a period
DisplayPort 1.2 Enables or disables DisplayPort 1.2.
High Saves energy using the high-efficiency SMART ENERGY SAVING feature.
Low Saves energy using the low-efficiency SMART ENERGY SAVING feature.
Off Disables the SMART ENERGY SAVING feature.
On The power LED turns on automatically.
Off The power LED turns off.
of time. You can set a timer for the auto-off function. (Off, 4 H, 6 H, and 8 H)
quality sound tools for a superior listening experience.
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NOTE
Be sure to configure this option according to the DisplayPort version supported by your graphics
y
card. Set this option to Disable if your graphics card does not support DisplayPort 1.2.
Buzzer This feature lets you set the sound generated from Buzzer when your monitor powers on.
On Enables your monitor's Buzzer.
Off Disables your monitor's Buzzer.
OSD Lock This feature disables the configuration and adjustment of menus.
On Enables OSD Lock.
Off Disables OSD Lock.
NOTE
All features are disabled except Brightness, Contrast, Volume, Input List, Aspect Ratio, OSD Lock
y
and Information.
OSD Size User can select OSD Size to Large or Small.
Deep Sleep Mode When Deep sleep mode is enabled, power consumption is minimized while the monitor is in standby
mode.
On Enables Deep sleep Mode.
Off Disables Deep sleep Mode.
NOTE
USB HUB functions will not work in standby mode while Deep sleep Mode is enabled in standby
y
mode.
Information The display information will be shown the Model, Serial Number, Total Power On Time, Resolution.
Reset Do you want to reset your settings?
No Cancel the select.
Yes Returns to the default settings.
NOTE
The value of energy saving data may differ depending on panel and panel suppliers.
y
If you select the option of SMART ENERGY SAVING is High or Low, monitor luminance become lower or
y
higher depend on source.
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TROUBLESHOOTING
Nothing is displayed on the screen.
Is the monitor's power cord plugged in?
Is the power LED on?
Is the power on and the power LED
displaying white?
Is the OUT OF RANGE message being
displayed?
Is the No Signal message being
displayed?
The OSD lock message is being displayed.
Are some functions not available when
you press the Menu button?
The screen retains an image.
Does image sticking occur even when
the monitor is turned off?
Check if the power cord is correctly plugged into the power outlet.
y
Check the power cable connection and press the power button.
y
Check that the connected input is enabled (Settings > Input > Input
y
list).
This occurs when signals transferred from the PC (graphics card) are out
y
of the horizontal or vertical frequency range of the monitor. Please see
the Product Specification section of this manual to set the appropriate
frequency.
This is displayed when the signal cable between the PC and the monitor is
y
missing or disconnected. Check the cable and reconnect it.
The OSD is locked. Go to Settings > General and set OSD Lock to Off.
y
Displaying a still image for a prolonged time may cause damage to the
y
screen, resulting in the retention of the image.
To extend the lifetime of the monitor, use a screensaver.
y
Screen display is unstable and shaky / Images displayed on the monitor leave shadow trails.
Did you select the appropriate
resolution?
If the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the screen
y
may be flickering. Change the resolution to 1080P or the recommended
resolution.
NOTE
Vertical frequency In order to display an image, the screen must be refreshed dozens of times per second, like a fluorescent
y
lamp. The number of times the screen is refreshed per second is called vertical frequency, or refresh rate, and is represented by
Hz.
Horizontal frequency The time it takes to display one horizontal line is called the horizontal cycle. If 1 is divided by the
y
horizontal interval, the result is the number of horizontal lines displayed per second. This is called horizontal frequency and is
represented by kHz.
LED can be lighted with Set OSD Menu.
y
Settings > General > Power LED > On
Page 27
NOTE
Check if the graphics card's resolution or frequency is within the range allowed by the monitor and set it to the
y
recommended (optimal) resolution in Control Panel > Display > settings.
Not setting the graphics card to the recommended (optimal) resolution may result in blurred text, a dimmed
y
screen, a truncated display area, or misalignment of the display.
The setting methods may be different depending on the computer or operating system, and some resolutions
y
may not be available depending on the performance of the graphics card. If this is the case, contact the
manufacturer of the computer or graphics card for assistance.
Some graphics cards may not support 3840 x 2160 resolution. If the resolution cannot be displayed, contact the
y
manufacturer of your graphics card.
The display color is abnormal.
Does the display appear discolored (16
colors)?
Does the display color appear unstable
or monochrome?
Are there spots on the screen?
Set the color to 24 bit (true color) or higher. In Windows, go to Control
y
Panel > Display > Settings > Color Quality.
Check if the signal cable is connected properly. Reconnect the cable or
y
reinsert the PC's graphics card.
When using the monitor, pixilated spots (red, green, blue, white, or black)
y
may appear on the screen. This is normal for an LCD screen. It is not an
error, nor is it related to the monitor's performance.
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Do you see an "Unrecognized monitor, Plug&Play (VESA DDC) monitor found" message?
Have you installed the display driver?
No sound from the headphone port or speaker.
Are images displayed using DisplayPort
or HDMI input without sound?
Be sure to install the display driver from our web site: http://www.lg.com.
y
Make sure to check if the video card supports Plug&Play function.
y
Try increasing the volume using the button on the monitor.
y
Set the audio output of the PC to the monitor you are using. On Microsoft
y
Windows, go to Control Panel > Hardware and Sound > Sound > set the
monitor as default device.
Page 28
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SPECIFICATIONS
27UK850/27BK85U
LCD Screen Type TFT (Thin Film Transistor)
LCD (Liquid Crystal Display) Screen
Sub Pixel Pitch 0.1554 mm x 0.1554 mm
Resolution Maximum Resolution 3840 x 2160 @ 60 Hz
Recommended Resolution 3840 x 2160 @ 60 Hz
Video Signal
Input Connector HDMI IN1, HDMI IN2 , DP(DisplayPort) IN, H/P, USB-C, USB (
Power input 19 V
Power
consumption (Typ.)
AC/DC adaptor Type A16-140P1A, CHICONY POWER TECHNOLOGY(SUZHOU)CO.,LTD.
Environmental
Conditions
Dimension Monitor Size (Width x Height x Depth)
Weight (Without
Packaging)
Horizontal Frequency 30 kHz to 135 kHz
Vertical Frequency 56 Hz to 61 Hz
) 1/2
7.0 A
On mode: 50 W Typ. (Outgoing condition) *
Sleep Mode ≤ 0.5 W (HDMI / DP input Condition) **
Off Mode ≤ 0.3 W
Or type ADS-150KL-19N-3 190140E, SHENZHEN HONOR ELECTRONIC
Output: 19 V
Operating Condition Temperature: 0°C to 40°C (32 °F to 104 °F); Humidity: < 80%
Storing Condition Temperature: -20°C to 60°C (-4 °F to 140 °F); Humidity: < 85%
With Stand 613.1 mm x 559.5 mm x 234.2 mm
Without Stand 613.1 mm x 364.4 mm x 44.6 mm
With Stand 6.1 kg (13.4 lbs)
Without Stand 4.8 kg (10.5 lbs)
7.37 A
(24.1 inches x 22.0 inches x 9.2 inches)
(24.1 inches x 14.3 inches x 1.7 inches)
The specifications are subject to change without notice.
The power consumption level can be different by operating condition and monitor setting.
* The On mode power consumption is measured with LGE test standard (Full White pattern , Maximum resolution).
** In case of USB-C input, the power consumption of Sleep Mode may vary depending on the connected device.
** The monitor goes to the Sleep Mode in a couple of minutes(Max 5 minutes).
Page 29
Factory Support Mode (Preset Mode, PC)
HDMI
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Display Modes (Resolution)
640 x 480 31.469 59.94 -/-
800 x 600 37.879 60.317 +/+
1024 x 768 48.363 60 -/-
1152 x 864 54.347 60.05 +/+
1280 x 720 45 60 +/+
1280 x 800 49.702 59.810 -/+
1280 x 1024 63.981 60.02 +/+
1600 x 900 60 60 +/+
1920 x 1080 67.5 60 +/-
2560 x 1440 88.79 59.95 +/-
3840 x 2160 67.5 30 +/-
3840 x 2160 135 60 +/-
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
DisplayPort / USB-C
Display Modes (Resolution)
640 x 480 31.469 59.94 -/-
800 x 600 37.879 60.317 +/+
1024 x 768 48.363 60 -/-
1152 x 864 54.347 60.05 +/+
1280 x 720 45 60 +/+
1280 x 800 49.702 59.810 -/+
1280 x 1024 63.981 60.02 +/+
1600 x 900 60 60 +/+
1920 x 1080 67.5 60 +/-
2560 x 1440 88.79 59.95 +/-
3840 x 2160 66.66 30 +/-
3840 x 2160 133.32 60 +/-
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Polarity(H/V) Remarks
When HDMI ULTRA HD Deep
Color is set to ON
Polarity(H/V) Remarks
Page 30
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30
HDMI Timing (Video)
Factory support mode
(Preset Mode)
480p 31.5 60
720p 45.0 60
1080p 67.5 60
2160p 135 60
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Power LED
Mode LED Color
On Mode White (For a few seconds)
Sleep Mode Off
Off Mode Off
Remarks
When HDMI ULTRA HD Deep Color is
set to ON
Page 31
To obtain the source code under GPL, LGPL, MPL,
and other open source licenses, that is contained in
this product, please visit http://opensource.lge.com.
In addition to the source code, all referred license
terms, warranty disclaimers and copyright notices are
available for download.LG Electronics will also provide
open source code to you on CD-ROM for a charge
covering the cost of performing such distribution
(such as the cost of media, shipping, and handling)
upon email request to [email protected]. This
offer is valid for three (3) years from the date on
which you purchased the product.
Supplier’s Declaration of Conformity
Trade Name LG
Responsible Party LG Electronics USA, Inc.
Address 1000 Sylvan Ave Englewood Cliffs,
NJ 07632
Telephone (201)266-2215
The model and serial number of the product are
located on the back and on one side of the product.
Record them below in case you ever need service.
MODEL
SERIAL
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