
ENG
ENGLISH
2
CONTENTS
22 USER SETTINGS
23 Customizing settings
27 TROUBLESHOOTING
29 SPECIFICATIONS
29 27UD59
30 27UD59P
31 Factory Support Mode (Preset Mode, PC)
31 HDMI
31 DisplayPort
32 HDMI Timing (Video)
32 Power LED
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
8 Input Connector
10 Moving and Lifting the Monitor
11 Setting up the Monitor set
11 - Assembling the stand base
13 - Installing onto a table
14 - Using the cable holder
14 - Adjusting the Stand Height
15 - Adjusting the angle
15 - Swivel stand
16 - Pivot Feature
18 - Using the Kensington lock
18 - Installing the wall mount plate
19 - Installing to a wall
20 USING THE MONITOR
20 Connecting to a PC
20 - HDMI connection
20 - DisplayPort connection
21 Connecting to AV Devices
21 - HDMI connection
21 Connecting to External Devices
21 - 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. in the
United States and other countries.
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”.

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27UD59
27UD59P
ASSEMBLING AND PREPARING
Product Components
Please check whether all the components are included in the box before using the product. If there are missing com-
ponents, contact the retail store where you purchased the product. Note that the product and components may look
different from those shown here.
y
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 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
performance of the product.
y
To purchase optional accessories, visit an electronics store or online shopping site or contact the retail store
where you purchased the product.
CAUTION
NOTE
CD / Card
DisplayPort Cable
( This cable is not included in
all countries. )
Stand Body Stand Base Cable Holder
HDMI Cable
( This cable is not included
in all countries. )
Power Cord
Stand Base Stand Body Screw Cover Cable Holder 2 Screws

6
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Component and Button Description
Power LED
y
On: power is on
y
Off: power is off
Joystick Button
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
Power on
Press the joystick button once with your finger to turn on the
monitor.
Power off
Press and hold the joystick button once with your finger to turn off the
monitor.
◄/►
Volume
Control
You can control the volume by moving the joystick button left/right.
y
The joystick button is located at the bottom of the monitor.
NOTE
27UD59

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Component and Button Description
Power LED
y
On: power is on
y
Off: power is off
Joystick Button
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
Power on
Press the joystick button once with your finger to turn on the
monitor.
Power off
Press and hold the joystick button once with your finger to turn off the
monitor.
◄/►
Volume
Control
You can control the volume by moving the joystick button left/right.
y
The joystick button is located at the bottom of the monitor.
NOTE
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Input Connector
27UD59

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Input Connector
27UD59P

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Moving and Lifting the Monitor
When moving or lifting the monitor, follow these in-
structions to prevent the monitor from being scratched
or damaged and to ensure safe transportation regard-
less of its shape or size.
y
As far as possible, avoid touching the monitor
screen. This may result in damage to the screen or
some of the pixels used to create images.
y
It is advisable to place the monitor in the original
box or packing material before attempting to
move it.
y
Before moving or lifting the monitor, disconnect
the power cord and all cables.
y
Hold the top and bottom of the monitor frame
firmly. Do not hold the screen itself.
y
When holding the monitor, the screen should face
away from you to prevent it being scratched.
y
When moving the monitor, avoid any strong shock
or vibrations to the product.
y
When moving the monitor, keep it upright, never
turn the monitor on its side or tilt it sideways.
CAUTION
y
If you use the monitor panel without the stand
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.

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CAUTION
Setting up the Monitor set
Assembling the stand base
y
To protect the screen from scratches, cover the
surface with a soft cloth.
CAUTION
1
5
2
3
4
Screw Cover
Stand Body
Stand Base
y
You can disassemble the stand in the reverse
order of the assembly.
y
To avoid injury to the fingers and foot when As-
sembly Stand Body and Base, should hold Base
when assembly stand body and base.
y
Illustrations in this document represent typical
procedures, so they may look different from the
actual product.
y
Do not carry the monitor upside down by just
holding the stand base. This may cause the moni-
tor to fall off the stand and could result in per-
sonal injury.
y
When lifting or moving the monitor, do not touch
the monitor screen. The force applied to the moni-
tor screen may cause damage to it.
y
Do not apply foreign substances (oils, lubricants,
etc.) to the screw parts when assembling the
product. (Doing so may damage the product.)
y
Applying excessive force when tightening screws-
may cause damage to the monitor. Damage caused
in this way will not be covered by the product war-
ranty.
NOTE
WARNING
27UD59

12
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I
II
CAUTION
Setting up the Monitor set
Assembling the stand base
y
To protect the screen from scratches, cover the
surface with a soft cloth.
CAUTION
1
2
3
y
You can disassemble the stand in the reverseorder
of the assembly.
y
Press the stand until the button reaches the top.
y
To avoid injury to the fingers and foot when As-
sembly Stand Body and Base, should hold Base
when assembly stand body and base.
y
Illustrations in this document represent typical
procedures, so they may look different from the
actual product.
y
Do not carry the monitor upside down by just
holding the stand base. This may cause the moni-
tor to fall off the stand and could result in per-
sonal injury.
y
When lifting or moving the monitor, do not touch
the monitor screen. The force applied to the moni-
tor screen may cause damage to it.
y
Do not apply foreign substances (oils, lubricants,
etc.) to the screw parts when assembling the
product. (Doing so may damage the product.)
y
Applying excessive force when tightening screws
may cause damage to the monitor. Damage caused
in this way will not be covered by the product war-
ranty.
NOTE
NOTE
WARNING
27UD59P

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27UD59P
27UD59P
Installing onto a table
1
Lift the monitor and place it on the table in an up-
right position.
Place at least 100 mm away from the wall to ensure
sufficient ventilation.
Cautions When Connecting Power Cord
2
Connect the Power cord to the monitor, then plug
the power cord into the wall outlet.
100 mm
100 mm
100 mm
100 mm
100 mm
100 mm
100 mm
100 mm
y
Unplug the power cord prior to moving or install-
ing the monitor. There is risk of electric shock.
y
Make sure to use the power cord that is pro-
vided in the product package and connect it to a
grounded power outlet.
y
If you need another power cord, please contact
your local dealer or the nearest retail store.
CAUTION
3
Press the joystick button on the bottom of the
monitor to turn on the monitor.
100-240 V ~
27UD59
27UD59

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Adjusting the Stand Height
1
Handle the monitor with both hands for safety.
2
The height can be adjusted up to 130.0 mm.
Using the cable holder
Arrange the cables using the cable holder as shown in
the illustration.
Cable holder
130.0 mm
y
Do not put your fingers or hand
between the screen and the base
(chassis) when adjusting the
screen's height.
WARNING
27UD59
27UD59P
27UD59P
Rotate Set(Pivot) and put connectors. It is easy to
put connectors and manage cables using cable holder.

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15°
Adjusting the angle
1
Place the monitor in an upright position, mounted
on the stand base.
Swivel stand
y
Image shown may differ from your Monitor set.
Swivel 355 degrees and adjust the angle of the
Monitor set to suit your view.
2
Adjust the angle of the screen. The angle of the
screen can be adjusted forwards or backwards for a
comfortable viewing experience.
Front Side
Front Side
Rear Side
Rear Side
y
To avoid injury to the fingers when adjusting the
screen, do not hold the lower part of the moni-
tor's frame as illustrated below.
WARNING
y
Be careful not to touch or press the screen area
when adjusting the angle of the monitor.
27UD59
27UD59
27UD59
27UD59P
27UD59P
27UD59P
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Pivot Feature
The pivot feature allows the monitor to rotate 90°
clockwise.
1
Raise the monitor to the maximum height.
2
Adjust the angle of the monitor in the direction of
the arrow as shown in the figure.
3
Rotate the monitor clockwise as shown in the figure.
4
Complete the installation by rotating the monitor
90° as shown below.
Stand
Head
WARNING
y
To avoid scratching the stand base, make sure that
when rotating the monitor using the pivot feature,
the stand does not make contact with the monitor.
y
Auto Pivot feature of the display is not supported.
y
The screen can be rotated easily using the screen
pivot shortcut key provided with your Windows op-
erating system. Note that some Windows versions
and some graphics card drivers may use different
settings for the screen pivot key or may not sup-
port the pivot key at all.
y
Windows screen pivot shortcut keys
-
0°: Ctrl + Alt + Up arrow key (
↑
)
-
90°: Ctrl + Alt + Left arrow key (
←
)
-
180°: Ctrl + Alt + Down arrow key (
↓
)
-
270°: Ctrl + Alt + Right arrow key (
→
)
NOTE
27UD59P

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Monitor head
NOTE
y
Take care when rotating the monitor if the cable
is connected.
y
To avoid injury when rotating the display, do not
place your fingers between the display and the
stand base.
WARNING
y
The left or right side of the monitor head can be
slightly rotated up or down (up to 3°). Adjust the
horizontal level of the monitor head.

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Installing the wall mount plate
This monitor supports the specification of the standard
wall mount plate or compatible device.
1
Place the screen face down. To protect the screen
from scratches, cover the surface with a soft cloth.
2
Place the wall mount plate onto the monitor and
align it with the screw holes.
3
Tighten the four screws to fix the plate to the moni-
tor using a screwdriver.
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.
Connect the Kensington security system cable between
the Monitor set and a table.
y
The wall mount plate is sold separately.
y
For more information on installation, refer to the
wall mount plate's installation guide.
y
Be careful not to use excessive force when
mounting the wall mount plate, as this can dam-
age the monitor's screen.
NOTE
y
Use of the Kensington lock is optional.
The accessories can be purchased at your local
electronics store.
NOTE
27UD59
27UD59P

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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.
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.
Installing to a wall
Install the monitor at least 100 mm away from the wall
and leave about 100 mm of space at each side of the
monitor to ensure sufficient ventilation. Detailed instal-
lation 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
100 mm
100 mm
100 mm
y
Unplug the power cord before moving or install-
ing the monitor to avoid electric shocks.
y
Installing the monitor on the ceiling or on a
slanted wall may result in the monitor falling off,
which could lead to injury. Please use the genu-
ine LG wall mounting bracket. For more informa-
tion, contact your local retail store or a qualified
installer.
y
Applying excessive force when fastening screws
may cause damage to the monitor. Damage
caused in this way will not be covered by the
product warranty.
y
Use the wall mounting bracket and screws
that conform to the VESA standard. Damage
caused by the use or misuse of inappropriate
components will not be covered by the product
warranty.
y
Screw length from outer surface of back cover
should be under 8mm.
y
Use the screws specified by the VESA standard.
y
The wall mount kit includes the installation guide
and all necessary parts.
y
The wall mounting bracket is optional. The acces-
sories can be purchased at your local retail store.
y
The length of the screw may differ for each wall
mounting bracket. Ensure the correct length
screw is used.
y
For more information, please refer to the user
manual for the wall mounting bracket.
CAUTION
NOTE
Wall mount Pad
Wall mount Pad
Back Cover
Back Cover
Standard screw
Max.8mm
y
Wall Mount (A x B)
A
B
Wall Mount (A x B) 100 x 100
Standard screw M4 x L10
Number of screws 4
Wall Mount Plate
(Optional)
LSW149

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USING THE MONITOR
Connecting to a PC
y
This monitor supports the *Plug and Play feature.
*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.
y
There may be no video or audio output depending
on the DP version of the PC.
y
If you use generic cables not certified by LG, the
screen may not display or there may be image
noises.
DisplayPort connection
Transmits the digital video and audio signals from your
PC to the monitor. Connect your PC to the monitor us-
ing the Displayport cable as illustrated below.
Press the menu button and then select the input option
from the input menu.
NOTE
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.
NOTE
y
If you use HDMI PC, it can cause compatibility
problem.
y
Use a certified cable with the HDMI logo attached.
If you do not use a certified HDMI cable, the
screen may not display or a connection error may
occur.
y
Recommended HDMI cable types
- High-Speed HDMI
®
/
TM
Cable
- High-Speed HDMI
®
/
TM
Cable with Ethernet

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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.
NOTE
y
If you use HDMI PC, it can cause compatibility
problem.
y
Use a certified cable with the HDMI logo attached.
If you do not use a certified HDMI cable, the
screen may not display or a connection error may
occur.
y
Recommended HDMI cable types
- High-Speed HDMI
®
/
TM
Cable
- High-Speed HDMI
®
/
TM
Cable with Ethernet
Connecting to External Devices
(sold separately)
Connecting Headphones
Connect peripherals to the monitor via the headphones
port. Connect as illustrated.
y
Peripheral devices are sold separately.
y
If you use angled earphones, it may cause a prob-
lem with connecting another external device to
the monitor. Therefore, it is recommended to use
straight earphones.
Angled Straight
y
Depending on the audio settings of the PC and
external device, headphones and speaker functions
may be limited.
NOTE

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Button Menu Status Description
Main menu disabled Enables the main menu.
Main menu enabled
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 disabled Adjusts the monitor volume level.
Main menu enabled Enters the menu features.
►
Main menu disabled Adjusts the monitor volume level.
Main menu enabled Enters the input feature.
▲
Main menu disabled Enables the main menu.
Main menu enabled Enters the game mode feature.
▼
Main menu disabled Enables the main menu.
Main menu enabled Turns off the monitor.
Main Menu Features
Main Menu Description
Menu Configures the screen settings.
Game Mode You can change Picture Mode to a gaming mode.
Input Sets input mode.
Monitor off Turns off the monitor.
Exit Exits the main menu.
USER SETTINGS
Activating the Main Menu
1
Press the joystick button on the bottom of the monitor.
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.
Joystick Button

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Customizing settings
Menu > Quick Settings Description
Brightness
Adjusts the color contrast and brightness of the screen.
Contrast
Volume Adjusts the volume.
NOTE
y
Jog joystick button down (
) in the Volume menu will enable/
disable the Mute function.
Input Selects the current input mode.
Ratio Adjusts the screen ratio.
Wide Displays the video in wide-screen, regardless of the video signal input.
Original Displays a video according to the input video signal aspect ratio.
NOTE
y
The display may look the same for Wide, Original options at the recommended resolution.
y
The ratio is disabled in the interlaced signal.
Menu Settings
1
To view the OSD menu, press the joystick button at the bottom of the monitor and then enter the Menu.
2
Configure the options by moving the joystick up/down/left/right.
3
To return to the upper menu or set other menu items, move the joystick to
◄
or pressing ( / Ok) it.
4
If you want to exit the OSD menu, move the joystick to
◄
until you exit.
y
When you enter the menu, instructions on how to use the button will appear in the bottom right corner of the screen.
Quick Settings Picture General Reset
y
Your monitor’s OSD (On Screen Display) may differ slightly from that shown in this manual.
CAUTION

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Menu > 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.
Dark Room 1 This mode adjusts the brightness to the optimal level for working in a dark environment.
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.
NOTE
y
If the picture mode is changed in the DP (DisplayPort) input, the screen may flicker
or the resolution of your PC screen may be affected.
Picture Adjust 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
images. 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.
Sharpness Adjusts the sharpness of the screen.
Black Level Sets the offset level (for HDMI only).
y
Offset: 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
ratio of the screen.
HDMI ULTRA
HD Deep Color
Provides sharper images when connected to a device supporting ULTRA HD Deep Color.
4K@60 Hz Support Format
1)
Resolution Frame rate (Hz)
Color Depth / Chroma Sampling
8 bit 10 bit
3840 x 2160
59.94
60.00
YCbCr 4:2:0
YCbCr 4:2:2
YCbCr 4:4:4 -
RGB 4:4:4 -
1) Supported when HDMI ULTRA HD Deep Color is set to On.
NOTE
y
If the connected device does not support ULTRA HD Deep Color, the feature may not
work properly.
y
If a problem occurs, set the HDMI ULTRA HD Deep Color option to Off.
DFC Adjusts the brightness automatically according to the screen.
Customizing settings

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Game Adjust Response Time Sets a response time for displayed pictures based on the speed of the screen.
For a normal environment, it is recommended that you use Middle. For a fast-
moving picture, it is recommended that you use high.
Setting to High may cause image sticking.
High Sets the response time to High.
Middle Sets the response time to Middle.
Low Sets the response time to Low.
Off Does not use the response time improvement feature.
FreeSync Provides seamless and natural images by synchronizing the vertical frequency of
the input signal with that of the output signal.
NOTE
y
To use the FreeSync feature, a graphic card that supports FreeSync is
necessary.
y
Supported Interface: DisplayPort
y
For more information, refer to AMD website at http://www.amd.com/
FreeSync
y
The screen flickering may occur intermittently in a specific gaming
environment.
Extended Enable wider frequency range of FreeSync function than
basic mode.
The screen may flicker during the game play.
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.
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 increas-
es the dynamic contrast on the screen.
Color Adjust Gamma The higher the gamma value, the darker the image becomes. Likewise, the lower
the gamma value, the lighter the image becomes. If you do not need to adjust
the gamma settings, select Off.
Color Temp Custom The user can adjust it to red, green, or blue by
customization.
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.
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 satura-
tion of the six colors(Red_Hue, Red_Saturation, Green_Hue, Green_Satura-
tion, Blue_Hue, Blue_Saturation, Yellow_Hue, Yellow_Saturation, Magenta_
Hue, Magenta_Saturation, Cyan_Hue, Cyan_Saturation ) and saving the
settings.
*Hue: Adjusts tone of the screen.
*Saturation: Adjusts the saturation of the screen colors. The lower the value,
less saturated and bright the colors become. The higher the value, the more
saturated and dark the colors become.
Reset Returns the color settings to the default settings.

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y
Saving Data depends on the Panel. So, those values should be different from each panel and panel vendor. If option of SMART
ENERGY SAVING is High or Low, monitor luminance become higher or lower depend on source.
Menu > General Description
Language Sets the menu screen to the desired language.
SMART ENERGY
SAVING
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.
Power LED Turns the power LED on the bottom of the monitor on or off.
On The power LED turns on automatically.
Off The power LED turns off.
Automatic Standby Feature that automatically turns off the monitor when there is no movement on the screen for a period
of time. You can set a timer for the auto-off function. (Off, 4 H, 6 H, and 8 H)
DisplayPort 1.2 Enables or disables DisplayPort 1.2.
y
Be sure to configure this option according to the DisplayPort version supported by your
graphics card. Set this option to Disable if your graphics card does not support DisplayPort 1.2.
NOTE
OSD Lock This feature disables the configuration and adjustment of menus.
On Enables OSD Lock.
Off Disables OSD Lock.
NOTE
y
All features are disabled except Brightness, Contrast, Volume, Input, OSD Lock in Settings, and
the Exit button.
NOTE
Menu > Reset Description
Do you want to reset your settings?
Reset Returns to the default settings.
Cancel Cancel the select.
Customizing settings

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TROUBLESHOOTING
Nothing is displayed on the screen.
Is the monitor's power cord plugged in?
y
Check if the power cord is correctly plugged into the power outlet.
Is the power LED on?
y
Check the power cable connection and press the power button.
Is the power on and the power LED
displaying white?
y
Check that the connected input is enabled (Menu > Quick Settings >
Input).
Is the power LED blinking?
y
If the monitor is in sleep mode, move the mouse, or press any key on the
keyboard, to switch the display on.
y
Check if the computer is turned on.
Is the OUT OF RANGE message being
displayed?
y
This occurs when signals transferred from the PC (graphics card) are out
of the horizontal or vertical frequency range of the monitor. Please see
the Product Specification section of this manual to set the appropriate
frequency.
Is the No Signal message being
displayed?
y
This is displayed when the signal cable between the PC and the monitor is
missing or disconnected. Check the cable and reconnect it.
The OSD lock message is being displayed.
Are some functions not avail-able when
you press the Menu button?
y
The OSD is locked. Go to Menu > General and set OSD Lock to Off.
The screen retains an image.
Does image sticking occur even when
the monitor is turned off?
y
Displaying a still image for a prolonged time may cause damage to the
screen, resulting in the retention of the image.
y
To extend the lifetime of the monitor, use a screensaver.
Screen display is unstable and shaky / Images displayed on the monitor leave shadow trails.
Did you select the appropriate
resolution?
y
If the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the screen
may be flickering. Change the resolution to 1080P or the recommended
resolution.
NOTE
y
Vertical frequency In order to display an image, the screen must be refreshed dozens of times per second, like a fluorescent
lamp. The number of times the screen is refreshed per second is called vertical frequency, or refresh rate, and is represented by
Hz.
y
Horizontal frequency The time it takes to display one horizontal line is called the horizontal cycle. If 1 is divided by the
horizontal interval, the result is the number of horizontal lines displayed per second. This is called horizontal frequency and is
represented by kHz.

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ENGLISH
The display color is abnormal.
Does the display appear discolored (16
colors)?
y
Set the color to 24 bit (true color) or higher. In Windows, go to Control
Panel > Display > Settings > Color Quality.
Does the display color appear unstable
or monochrome?
y
Check if the signal cable is connected properly. Reconnect the cable or
reinsert the PC's graphics card.
Are there spots on the screen?
y
When using the monitor, pixilated spots (red, green, blue, white, or black)
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.
Do you see an "Unrecognized monitor, Plug&Play (VESA DDC) monitor found" message?
Have you installed the display driver?
y
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
Check if the graphics card's resolution or frequency is within the range allowed by the monitor and set it to the
recommended (optimal) resolution in Control Panel > Display > settings.
y
Not setting the graphics card to the recommended (optimal) resolution may result in blurred text, a dimmed
screen, a truncated display area, or misalignment of the display.
y
The setting methods may be different depending on the computer or operating system, and some resolutions
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.
y
Some graphics cards may not support 3840 x 2160 resolution. If the resolution cannot be displayed, contact the
manufacturer of your graphics card.
NOTE
No sound from the headphone port or speaker.
Are images displayed using DisplayPort
or HDMI input without sound?
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
Windows, go to Control Panel > Hardware and Sound > Sound > set the
monitor as default device.

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SPECIFICATIONS
27UD59
LCD Screen Type TFT (Thin Film Transistor)
LCD (Liquid Crystal Display) Screen
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
Horizontal Frequency 30 kHz to 135 kHz
Vertical Frequency 56 Hz to 61 Hz
Input Connector HDMI IN1, HDMI IN2 , DP(DisplayPort) IN, H/P(Headphone) OUT
Power input AC 100-240 V~ 50 / 60 Hz, 1.5 A
Power
consumption (Typ.)
On mode: 29.5 W Typ. (ENERGY STAR® standard)*
37 W Typ. (Outgoing condition)**
Sleep Mode ≤ 0.5 W
Off Mode ≤ 0.3 W
Environmental
Conditions
Operating Condition Temperature: 0°C to 40°C; Humidity: < 80%
Storing Condition Temperature: -20°C to 60°C; Humidity: < 85%
Dimension Monitor Size (Width x Height x Depth)
With Stand 632.5 mm x 474.9 mm x 217.3 mm
Without Stand 632.5 mm x 375.9 mm x 61.3 mm
Weight (Without
Packaging)
5.6 kg
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 ENERGY STAR® test standard.
** The On mode power consumption is measured with LGE test standard (Full White pattern , Maximum resolution).

30
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ENGLISH
SPECIFICATIONS
27UD59P
LCD Screen Type TFT (Thin Film Transistor)
LCD (Liquid Crystal Display) Screen
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
Horizontal Frequency 30 kHz to 135 kHz
Vertical Frequency 56 Hz to 61 Hz
Input Connector HDMI IN1, HDMI IN2 , DP(DisplayPort) IN, H/P(Headphone) OUT
Power input AC 100-240 V~ 50 / 60 Hz, 1.5 A
Power
consumption (Typ.)
On mode: 29.5 W Typ. (ENERGY STAR® standard)*
37 W Typ. (Outgoing condition)**
Sleep Mode ≤ 0.5 W
Off Mode ≤ 0.3 W
Environmental
Conditions
Operating Condition Temperature: 0°C to 40°C; Humidity: < 80%
Storing Condition Temperature: -20°C to 60°C; Humidity: < 85%
Dimension Monitor Size (Width x Height x Depth)
With Stand 632.5 mm x 406.9 mm x 249.7 mm
Without Stand 632.5 mm x 375.9 mm x 42.8 mm
Weight (Without
Packaging)
7.2 kg
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 ENERGY STAR® test standard.
** The On mode power consumption is measured with LGE test standard (Full White pattern , Maximum resolution).

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Factory Support Mode (Preset Mode, PC)
HDMI
Display Modes (Resolution)
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Polarity(H/V) Remarks
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 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 +/-
When HDMI ULTRA HD Deep
Color is set to ON.
DisplayPort
Display Modes (Resolution)
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Polarity(H/V) Remarks
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 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 +/-

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HDMI Timing (Video)
Factory support mode
(Preset Mode)
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Remarks
480p 31.5 60
720p 45.0 60
1080p 67.5 60
2160p 135 60
When HDMI ULTRA HD Deep Color is
set to ON.
Power LED
Mode LED Color
On Mode White
Sleep Mode Flashing White
Off Mode Off

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.
As an ENERGY STAR Partner LGE U. S.
A.,Inc. has determined that this product
meets the ENERGY STAR guidelines for
energy efficiency.
ENERGY STAR is a set of power-saving
guidelines issued by the U.S.Environmental
Protection Agency(EPA).
Refer to ENERGY STAR.gov for more information
on the ENERGY STAR program.
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 opensource@lge.com. This
offer is valid for three (3) years from the date on
which you purchased the product.
MODEL
SERIAL



