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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
27UD88
27MU88
www.lg.com
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ENGLISH
ENG
2
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
14 - Detaching the Stand Body
14 - Installing the wall mount plate
15 - Installing to a wall
19 USER SETTINGS
19 Activating the Main Menu
20 Customizing settings
20 - Menu Settings
20 - -Quick Settings
21 - -PBP
22 - -Picture
25 - -General
27 - -Reset
28 TROUBLESHOOTING
30 SPECIFICATIONS
30 27UD88/27MU88
31 Factory Support Mode (Preset Mode, PC)
31 HDMI
31 DisplayPort/ USB-C
32 HDMI Timing (Video)
32 Power LED
16 USING THE MONITOR
16 Connecting to a PC
16 - HDMI connection
16 - DisplayPort connection
16 - USB-C connection
17 Connecting to AV Devices
17 - HDMI connection
17 Connecting Peripherals
17 - USB Cable connection - PC
18 - Connecting Headphones
18 Service only port
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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.
VESA, VESA logo, DisplayPort Compliance Logo and DisplayPort Compliance Logo for
dual-mode source are all registered trademarks of the Video Electronics Standards
Association.
The SuperSpeed USB Trident logo is a registered trademark of USB Implementers
Forum, Inc.
3
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ENG
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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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(Owner's Manual) /
Card
Power Cord
AC-DC Adapter
HDMI Cable
Stand Base Stand Body
DisplayPort Cable
USB C-C cable USB C-A cable
Cable Holder
CAUTION
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 (
Drivers and Software Installation Priority 27UD88/27MU88
Monitor Driver Recommended O
OnScreen Control Recommended O
Dual Controller Optional O
True Color Pro Optional O
www.lg.com
).
5
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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
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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 panel 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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9
Installing the Monitor
Assembling the stand base
1
CAUTION
To protect the screen from scratches, cover the
y
surface with a soft cloth.
3
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4
2
NOTE
Stand Body
Press the stand until the button reaches the
y
top.
Stand Base
or
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CAUTION
Illustrations in this document represent typical
y
procedures, so they may look different from the
actual 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.
Do not carry the monitor upside down by just
y
holding the 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 touch
y
the monitor screen. The force applied to the monitor screen may cause damage to it.
NOTE
You can disassemble the stand in the reverse
y
order of the assembly.
Using the cable holder
Arrange the cables using the cable holder as shown in
the illustration.
Cable Holder
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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 adapter to the monitor and then
2
plug 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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2
1
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.
3
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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.
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)
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.
WARNING
y
Do not put your fingers or hand
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 that
y
when rotating the monitor using the pivot feature,
the stand does not make contact with the monitor.
Raise the monitor to the maximum height.
1
Rotate the monitor clockwise as shown in the fig-
3
ure.
Complete the installation by rotating the monitor
4
90° as shown below.
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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.
Windows screen pivot shortcut keys
y
-0°: Ctrl + Alt + Up arrow key (↑)
-90°: Ctrl + Alt + Left arrow key (←)
-180°: Ctrl + Alt + Down arrow key (↓)
-270°: Ctrl + Alt + Right arrow key (→)
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WARNING
Take care when rotating the monitor if the cable is
y
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
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.
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.
NOTE
Use of the Kensington lock is optional. The acces-
y
sories can be purchased at your local electronics
store.
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.
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Wall Mount (A x B)
y
15
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.
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
100 x 100
B)
Standard screw M4 x L10
Number of
screws
Wall Mount
RW120
Plate
(Optional)
4
100 mm
(3.94 inches)
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 8mm(0.31 inches).
Wall mount Pad
Back Cover
Wall mount Pad
Back Cover
Standard screw:
Max.8mm(0.31 inches)
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.
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USING THE MONITOR
Connecting to a PC
This monitor supports the *Plug and Play
y
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.
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.
DP OUT
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.
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
USB-C connection
Transmits digital video and audio signals and USB data
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-A cable) (USB C-C cable)
(Data Only)
NOTE
PD(Power Delivery), DP Alternate Mode(DP over
y
USB-C) and USB Data are supported via USB-C Port.
Features may not work properly depending on the
y
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 .
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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.
Connecting Peripherals
USB Cable connection - PC
The USB port on the product functions as a USB hub.
Please connect the USB C-C or USB C-A cable to the
PC.
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.
When Quick Charge is set to On , data
y
transmission through the USB1/2 port is not
available (e.g. connecting your keyboard, mouse,
or other USB storage devices to the monitor). (Go
to General > Quick Charge to set Quick Charge
to On or Off .)
The charging speed may vary depending on the
y
device.
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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
(sold separately)
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.)
If Quick Charge is off and the upstream Port is
y
not connected with Host PC, monitor may not
support ‘Charge’ .
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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.
Service only port
The port is used only for “Service”.
SERVICE ONLY
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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USER SETTINGS
Activating the Main Menu
Press the joystick button on the bottom of the monitor.
1
Move the joystick up/down (
2
Press the joystick button once more to exit the main menu.
3
Button Menu Status Description
Main menu disabled Enables the main menu.
) and left/right(
▲/▼
◄/►
Joystick Button
) to set the options.
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Main menu enabled
◄
►
▲
▼
Main Menu 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 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.
Menu Configures the screen settings.
Game Mode
Input Sets input mode.
Monitor off Turns off the monitor.
Main Menu Description
You can change Picture Mode to a gaming
mode.
Exit Exits the main menu.
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Customizing settings
Menu Settings
-Quick Settings
To view the OSD menu, press the joystick button at the
1
bottom of the monitor and then enter the Menu.
Go to Quick Settings >
2
stick.
Configure the options following the instructions that ap-
3
pear in the bottom right corner.
To return to the upper menu or set other menu items,
4
move the joystick to ◄ or pressing ( / OK) it.
If you want to exit the OSD menu, move the joystick to ◄
5
until you exit.
Brightness
by moving the joy-
Each option is described below.
Menu > Quick Settings Description
Brightness
Contrast
Volume Adjusts the volume.
Adjusts the color contrast and brightness of the screen.
NOTE
You can adjust Mute/ Unmute by moving the joystick button to ▼ in the Volume
y
menu.
Input Selects the current input mode.
Ratio Adjusts the screen ratio.
Wide
Original
1:1
Displays the video in wide-screen, regardless of the video signal input.
Displays a video according to the input video signal aspect ratio.
The aspect ratio is not adjusted from the original.
NOTE
The display may look the same for Wide, Original, and 1:1 options at the recommended resolution.
y
The ratio is disabled in the interlaced signal.
y
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-PBP
To view the OSD menu, press the joystick button at the
1
bottom of the monitor and then enter the Menu.
Go to PBP by moving the joystick.
2
Configure the options following the instructions that ap-
3
pear in the bottom right corner.
To return to the upper menu or set other menu items,
4
move the joystick to ◄ or pressing ( / OK) it.
If you want to exit the OSD menu, move the joystick to ◄
5
until you exit.
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Each option is described below.
Menu > PBP Description
Sub Displays the screens of two input modes on one monitor.
PBP Connection
HDMI 1 HDMI 2 DisplayPort USB-C
Main Screen
(Left)
Sound Out
Swap Toggles between the main screen and sub screen in PBP mode.
Sub Full
Ratio Adjusts the aspect ratio of the main screen or sub screen.
Changes the audio output in PBP mode.
Converts the sub screen of PBP mode to the wide screen.
Main Wide Displays the video to fit the PBP screen, regardless of the video signal input.
Original Displays the video in the aspect ratio of the video signal input on the PBP
Sub Wide Displays the video to fit the PBP screen, regardless of the video signal input.
Original Displays the video in the aspect ratio of the video signal input on the PBP
screen.
screen.
HDMI 1
HDMI 2
DisplayPort
USB-C
- - O O
- - O O
O O - -
O O - -
Sub Screen (Right)
NOTE
When the Sub mode is Off, Sound Out, Swap, Sub Full, and Ratio menus become disabled.
y
The Main/Sub options for Ratio become disabled if there is no signal.
The optimal resolution for PBP mode is set automatically when PBP mode is set.
y
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Quick Charge
ENG
22
-Picture
To view the OSD menu, press the joystick button at the
1
bottom of the monitor and then enter the Menu.
Go to
2
Configure the options following the instructions that ap-
3
pear in the bottom right corner.
To return to the upper menu or set other menu items,
4
move the joystick to ◄ or pressing ( / OK) it.
If you want to exit the OSD menu, move the joystick to ◄
5
until you exit.
Each option is described below.
Menu > Picture
Picture Mode Custom Allows the user to adjust each element. The color mode of the main menu can be adjusted.
by moving the joystick.
Picture
Description
Reader Optimizes the screen for viewing documents. You can brighten the screen in the
OSD menu.
sRGB A standard RGB color space for the monitor and printer.
Color
Weakness
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
RTS Game This mode is optimized for RTS Game.
Custom (Game)
EBU
REC709
SMPTE-C
DICOM
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 games.
In this mode, users can customize various elements including game-related options.
A standard TV PAL color space for broadcasting.
A standard HDTV color space for broadcasting.
A standard TV NTSC color space for broadcasting.
Optimizes the screen for viewing X-ray images. You can brighten the screen in the
OSD menu.
NOTE
This product has been approved as an IT device and not as a medical device. It is
Calibration 1
Calibration 2
y
intended for office use only. (It may be used for education and reference purposes
but not for medical diagnosis.)
Adjusts to the last calibrated screen.
Adjusts to the previously calibrated screen.
NOTE
If the picture mode is changed in the DP (DisplayPort) input, the screen may flicker or the resolution of
y
your PC screen may be affected.
Calibration 2 : Installation of TRUE COLOR PRO and proceeding Calibration will enable this menu.
y
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Picture Adjust SUPER
RESOLUTION+
Sharpness Adjusts the sharpness of the screen.
Black Level Sets the offset level (for HDMI only).
HDMI ULT R A
HD Deep Color
High Optimized picture quality is displayed when a user wants crystal
clear images. It is effective for high quality video or game.
iddle The optimized picture quality is displayed when a user wants im-
M
ages 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.
Offset: as a reference for a video signal, this is the darkest color the monitor can
y
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.
Provides sharper images when connected to a device supporting ULTRA HD
Deep Color.
1)
Resolution
4K@60 Hz Support Format
Frame rate
(Hz)
8 bit 10 bit
Color Depth / Chroma Sampling
YCbCr 4:2:0
3840 x 2160
59.94
60.00
YCbCr 4:4:4 -
YCbCr 4:2:2
RGB 4:4:4 -
1) Supported when HDMI ULTRA HD Deep Color is set to On.
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NOTE
If the connected device does not support ULTRA HD Deep Color, the
y
feature may not work properly.
If a problem occurs, set the HDMI ULTRA HD Deep Color option to Off.
y
DFC Adjusts the brightness automatically according to the screen.
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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
For a normal environment, it is recommended that you use Middle. For a fastmoving 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.
of the input signal with that of the output signal.
CAUTION
Supported Interface: DisplayPort.
y
Supported Graphic Card : A graphic card that supports AMD’s FreeSync is
y
necessary.
Supported Version : Make sure to update the graphic card to the latest
y
driver.
For more information and requirement, refer to AMD website at http://
y
www.amd.com/FreeSync
On FreeSync function on.
Off FreeSync function off.
Black Stabilizer You can control the black contrast to have better visibility in dark scenes.
Color Adjust Gamma The higher the gamma value, the darker the image becomes. Likewise, the
Color Temp Manual Adjusts the color temperature in 500K increments. (Note
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 satu-
Reset Returns the color settings to the default settings.
Aspect Marker This function is to express aspect ratio for screen .
Off Disables Aspect Marker
17:9 Enables to marker for 17:9
4:3 Enables to marker for 4:3
2.35:1 Enables to marker for 2.35:1
2.39:1 Enables to marker for 2.39:1
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.
lower the gamma value, the lighter the image becomes. If you do not need to
adjust the gamma settings, select Off.
that 9300K is supported instead of 9500K.)
Custom The user can adjust it to red, green, or blue by
customization
ration of the six 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 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.
Page 25
-General
To view the OSD menu, press the joystick button at the
1
bottom of the monitor and then enter the Menu.
Go to
2
Configure the options following the instructions that ap-
3
pear in the bottom right corner.
To return to the upper menu or set other menu items,
4
move the joystick to ◄ or pressing ( / OK) it.
If you want to exit the OSD menu, move the joystick to ◄
5
until you exit.
Each option is described below.
Menu > General Description
Language Sets the menu screen to the desired language.
SMART ENERGY
SAVING
Power LED Turns the power LED on the front of the monitor on or off.
Automatic Standby Feature that automatically turns off the monitor when there is no movement on the screen
DisplayPort 1.2 Enables or disables DisplayPort 1.2.
by moving the joystick.
General
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.
for a period of time. You can set a timer for the auto-off function. (Off, 4 H, 6 H, and 8 H)
25
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ENG
NOTE
Be sure to configure this option according to the DisplayPort version supported by your
y
graphics card. Set this option to Disable if your graphics card does not support DisplayPort 1.2.
NOTE
Saving Data depends on the Panel. So,those values should be different from each panel and panel vendor.If op-
y
tion of SMART ENERGY SAVING is High or Low, monitor luminance become higher or lower depend on source.
Page 26
ENGLISH
ENG
26
Menu > General Description
Quick Charge Quick Charge is a feature that rapidly charges the device connected to the USB 3.0 port.
On Enables Quick Charge.
Off Disables Quick Charge.
NOTE
When Quick Charge is set to On, data transmission through the USB1/2 port is not available
y
(e.g. connecting your keyboard, mouse, or other USB storage devices to the monitor).
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 in Quick Settings, and
y
OSD Lock in General..
Page 27
-Reset
To view the OSD menu, press the joystick button at the
1
bottom of the monitor and then enter the Menu.
Go to
2
Configure the options following the instructions that ap-
3
pear in the bottom right corner.
To return to the upper menu or set other menu items,
4
move the joystick to ◄ or pressing ( / OK) it.
If you want to exit the OSD menu, move the joystick to ◄
5
until you exit.
by moving the joystick.
Reset
27
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ENG
Each option is described below.
Menu > Reset Description
Do you want to reset your settings?
Reset Returns to the default settings.
Cancel Cancel the select.
Page 28
28
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ENG
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 power LED blinking?
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 avail-able
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 (Menu > Quick Settings >
y
Input).
If the monitor is in sleep mode, move the mouse, or press any key on the
y
keyboard, to switch the display on.
Check if the computer is turned on.
y
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 Menu > 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?
PC(or USB host device) cannot detect USB peripheral connected to USB-A port.
Did you change the OSD Menu
“Quick Charge” off?
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.
When set “Quick Charge” On, device will be charged quickly, but cannot
y
use USB data.
When Set “Quick Charge” Off, device will be charged slowly, and can use
y
USB data.
NOTE
Vertical frequency In order to display an image, the screen must be refreshed dozens of times per second, like a
y
fluorescent 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
y
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.
Page 29
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 3840x2160 resolution. If the resolution cannot be displayed, contact the
y
manufacturer of your graphics card.
The display color is abnormal.
Does the display appear discol-ored
(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 Con-trol
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.
29
ENGLISH
ENG
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 30
30
ENGLISH
ENG
SPECIFICATIONS
27UD88/27MU88
LCD Screen Type TFT (Thin Film Transistor) LCD (Liquid Crystal Display) Panel,Anti-
Glare coating
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( ) 1, 2
Power Voltage 19 V 6.5 A
AC/DC adaptor Type LCAP31, LIEN CHANG ELECTRONIC ENTERPRISE production
Environmental
Conditions
Stand Angle Adjustment
Dimension Monitor Size (Width x Height x Depth)
Weight (Without
Packaging)
Horizontal Frequency 30 kHz to 135 kHz
Vertical Frequency 56Hz to 61 Hz
Power consumption (Typ.) On mode: 29.8 W Typ. ( ENERGY STAR® standard ) *
47.8 W Typ. ( Outgoing condition ) **
Off Mode ≤ 0.3 W
Output: 19 V 7.37 A
Operating Conditions
Storing Condition
Forwards/Backwards: -3° to 20° (Head)
With Stand 615.0 mm x 425.2 mm x 222.6 mm
Without Stand 615.0 mm x 365.1 mm x 42.7 mm
With Stand 6.2 kg (13.6 lbs)
Without Stand 4.7 kg (10.3 lbs)
Temperature 0 °C to 40 °C (32 °F to 104 °F)
Humidity Less than 80 %
Temperature -20 °C to 60 °C (-4 °F to 140 °F)
Humidity Less than 85 %
(24.2 inches X 16.7 inches X 8.7 inches)
(24.2 inches X14.3 inches X 1.6 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 ENERGY STAR® test standard.
** The On mode power consumption is measured with LGE test standard ( Full White pattern , Maximum resolution).
Page 31
Factory Support Mode (Preset Mode, PC)
HDMI
31
ENGLISH
ENG
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 1024 63.981 60.02 +/+
1600 x 900 60 60 +/+
1920 x 1080 67.5 60 +/-
1920 x 2160 133.29 60 +/-
3840 x 2160 67.5 30 +/-
3840 x 2160 135 60 +/-
Horizontal
Frequency(kHz)
Vertical
Frequency(Hz)
Polarity(H/
V)
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 1024
1600 x 900 60 60 +/+
1920 x 1080 67.5 60 +/-
1920 x 2160 133.32 60 +/-
3840 x 2160 66.66 30 +/-
3840 x 2160 133.32 60 +/-
Horizontal
Frequency(kHz)
63.981 60.02 +/+
Vertical
Frequency(Hz)
Polarity(H/
V)
Remarks
Recommended resolution
for PBP
When HDMI ULTRA HD
Deep Color is set to ON.
Remarks
Recommended resolution
for PBP
Page 32
ENGLISH
ENG
32
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)
Power LED
Mode LED Color
On Mode White
Sleep Mode Flashing White
Off Mode Off
Vertical
Frequency(Hz)
Remarks
When HDMI ULTRA HD Deep Color
is set to ON.
Page 33
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.
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
This device meets the EMC requirements for home
appliances (Class B) and is intended for home usage.
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
ENERGY STAR® is a set of power-saving guidelines issued
by the U.S.Environmental Protection Agency (EPA).
As an ENERG Y STAR ® Partne r LGE U. S. A., Inc. has
determined that this product meets the ENERGY STAR®
guidelines for energy efficiency.
Refer to ENERGYSTAR.gov for more information on the ENERGY STAR® program.
SERIAL
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