Table of Contents
LG 27UD88-W User Manual
Displayed below is the user manual for 27UD88-W by LG which is a product in the Computer Monitors category. This manual has pages.
Related Manuals
www.lg.com
Please read the safety information carefully before using the product.
IPS LED Monitor (LED Monitor) Model List
Owner's Manual
IPS LED MONITOR
(LED MONITOR*)
*LG LED Monitors are LCD Monitors with LED Backlighting.
27UD88
2
ENGLISH
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
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
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
31 Factory Support Mode (Preset Mode, PC)
31 HDMI
31 DisplayPort/ USB-C
32 HDMI Timing (Video)
32 Power LED
33 PROPER POSTURE
33 Proper Posture for Using the Monitor
3
ENGLISH
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 LLC in the United States and other
countries.
VESA, VESA logo, Display Port Compliance Logo and Display Port 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.
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”.
4
ENGLISH
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.
yAlways use genuine components to ensure safety and product performance.
yThe product warranty will not cover damage or injury caused by the use of counterfeit components.
yIt is recommend that use the supplied components.
yIf you use generic cables not certified by LG, the screen may not display or there may be image noises.
yNote that the components may look different from those shown here.
yWithout prior notice, all information and specifications in this manual are subject to change to improve the performance
of the product.
yTo purchase optional accessories, visit an electronics store or online shopping site or contact the retail store where you
purchased the product.
CAUTION
NOTE
CD(Owner's Manual) /
Card
Display Port Cable USB C-C cable USB C-A cable
Stand Base Stand Body
HDMI Cable
Power Cord AC-DC Adapter
Cable Holder
5
ENGLISH
Supported Drivers and Software
Check the drivers and software supported by your product and refer to the manuals on the CD enclosed in the product package.
yRequired and Recommended: You can download and install the latest version from the enclosed CD or from the LGE
website
(www.lg.com)
.
yOptional: You can download and install the latest version from the LGE website
(www.lg.com)
.
Drivers and Software Installation Priority 27UD88
Monitor Driver Recommended O
OnScreen Control Recommended O
Dual Controller Optional O
TRUE COLOR PRO Optional O
6
ENGLISH
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.
yThe joystick button is located at the bottom of the monitor.
NOTE
7
ENGLISH
Input Connector
8
ENGLISH
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.
yAs 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.
yIt is advisable to place the monitor in the original box
or packing material before attempting to move it.
yBefore moving or lifting the monitor, disconnect the
power cord and all cables.
yHold the top and bottom of the monitor frame firmly.
Do not hold the panel itself.
yWhen holding the monitor, the screen should face
away from you to prevent it being scratched.
yWhen moving the monitor, avoid any strong shock or
vibrations to the product.
yWhen moving the monitor, keep it upright, never turn
the monitor on its side or tilt it sideways.
yIf 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.
CAUTION
9
ENGLISH
Installing the Monitor
Assembling the stand base
yTo protect the screen from scratches, cover the
surface with a soft cloth.
CAUTION
1
3
4
2
Stand Body
Stand Base yPress the stand until the button reaches the top.
NOTE
or
10
ENGLISH
yIllustrations in this document represent typical
procedures, so they may look different from the
actual product.
yApplying excessive force when tightening screws
may cause damage to the monitor. Damage caused in
this way will not be covered by the product warranty.
yDo not carry the monitor upside down by just holding
the base. This may cause the monitor to fall off the
stand and could result in personal injury.
yWhen lifting or moving the monitor, do not touch
the monitor screen. The force applied to the monitor
screen may cause damage to it.
CAUTION
Using the cable holder
Cable Holder
Arrange the cables using the cable holder as shown in the
illustration.
yYou can disassemble the stand in the reverse order of
the assembly.
NOTE
11
ENGLISH
Installing onto a table
1 Lift the monitor and place it on the table in an upright
position.
Place at least 10 cm away from the wall to ensure suf-
ficient ventilation.
Cautions When Connecting Power Cord
2 Connect the power adapter to the monitor and then plug
the power cord into the wall outlet.
10 cm
10 cm
10 cm
10 cm
or
yUnplug the power cord prior to moving or installing
the monitor. There is risk of electric shock.
yMake sure to use the power cord that is provided in
the product package and connect it to a grounded
power outlet.
yIf 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 ~
12
ENGLISH
Adjusting the angle
1 Place the monitor in an upright position, mounted on the
stand base.
Adjusting the Stand Height
1 Handle the monitor with both hands for safety.
2 The height can be adjusted up to 110.0 mm.
2 Adjust the angle of the screen. The angle of the screen
can be adjusted forwards or backwards for a comfortable
viewing experience.
Front SideRear Side
yTo avoid injury to the fingers when adjusting the
screen, do not hold the lower part of the monitor's
frame as illustrated below.
WARNING
yBe careful not to touch or press the screen area when
adjusting the angle of the monitor.
110.0 mm
yDo not put your fingers or hand
between the screen and the base
(chassis) when adjusting the
screen's height.
WARNING
13
ENGLISH
3 Rotate the monitor clockwise as shown in the figure.
4 Complete the installation by rotating the monitor 90° as
shown below.
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 ar-
row as shown in the figure.
Stand
Head
WARNING
yTo 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.
yAuto Pivot feature of the display is not supported.
yThe screen can be rotated easily using the screen 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.
ySupported Windows versions: Windows 7 and Windows
8.1
yWindows 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
14
ENGLISH
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 monitor
using a screwdriver.
1 Place the monitor’s screen face down. To protect the
screen from scratches, cover the surface with a soft
cloth.
2 Remove the stand from the monitor by pressing the but-
ton on the bottom center of the back of the monitor.
yThe wall mount plate is sold separately.
yFor more information on installation, refer to the wall
mount plate's installation guide.
yBe careful not to use excessive force when mounting
the wall mount plate, as this can damage the monitor's
screen.
NOTE
yUse of the Kensington lock is optional. The
accessories can be purchased at your local electronics
store.
NOTE
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.
yTake care when rotating the monitor if the cable is
connected.
yTo avoid injury when rotating the display, do not place
your fingers between the display and the stand base.
Detaching the Stand Body
WARNING
15
ENGLISH
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 damaged
and drop from mounted position.
In this case, LG Electronics is not responsible for it.
Installing to a wall
Install the monitor at least 10 cm away from the wall and
leave about 10 cm of space at each side of the monitor to
ensure sufficient ventilation. Detailed installation instruc-
tions can be obtained from your local retail store. Please refer
to the manual to install and set up a tilting wall mounting
bracket.
10 cm
10 cm
10 cm
10 cm
yUnplug the power cord before moving or installing
the monitor to avoid electric shocks.
yInstalling 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 genuine LG wall
mounting bracket. For more information, 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.
yUse 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.
yScrew length from outer surface of back cover should
be under 8mm.
yUse the screws specified by the VESA standard.
yThe wall mount kit includes the installation guide and
all necessary parts.
yThe wall mounting bracket is optional. The accessories
can be purchased at your local retail store.
yThe length of the screw may differ for each wall
mounting bracket. Ensure the correct length screw is
used.
yFor 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
yWall 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)
RW120
16
ENGLISH
USING THE MONITOR
Connecting to a PC
yThis 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.
DP OUT
DisplayPort connection
Transmits the digital video and audio signals from your PC
to the monitor. Connect your PC to the monitor using the
display port cable as illustrated below.
Press the menu button and then select the input option from
the input menu.
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.
yThere may be no video or audio output depending on
the DP version of the PC.
yIf you use generic cables not certified by LG, the screen
may not display or there may be image noises.
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 de-
vice to the monitor with the HDMI cable as illustrated below.
Press the menu button and then select the input option from
the input menu.
(USB C-A cable)
(Data Only)
(USB C-C cable)
NOTE
yIf you use HDMI PC, it can cause compatibility problem.
yUse 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.
yRecommended HDMI cable types
- High-Speed HDMI®/TM Cable
- High-Speed HDMI®/TM Cable with Ethernet
NOTE
yPD(Power Delivery), DP Alternate Mode(DP over
USB-C) and USB Data are supported via USB-C Port.
yFeatures may not work properly depending on the
connected device’s specifications and the environment.
yUSB-C port is not for the Monitor Power source but
for a PC power source.
Connect Adapter to supply power to the Monitor
17
ENGLISH
(sold separately)
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 de-
vice 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
yIf you use HDMI PC, it can cause compatibility problem.
yUse 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.
yRecommended HDMI cable types
- High-Speed HDMI®/TM Cable
- High-Speed HDMI®/TM Cable with Ethernet
NOTE
yMake sure to install the most recent Windows OS
service pack before using the product.
yPeripheral devices are sold separately.
yA keyboard, mouse, or USB device can be connected to
the USB port.
yWhen Quick Charge is set to On , data 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 .)
yThe charging speed may vary depending on the device.
Cautions When Using a USB Device
yA USB device with an automatic recognition
program installed, or that uses its own driver, may
not be recognized.
ySome USB devices may not be supported or may
not work properly.
yIt is recommended to use a USB hub or hard disk
drive with power supplied. (If the power supply
is not adequate, the USB device may not be
recognized properly.)
yIf Quick Charge is off and the upstream Port is
not connected with Host PC, monitor may not
support ‘Charge’ .
CAUTION
18
ENGLISH
Service only port
(sold separately)
Connecting Headphones
Connect peripherals to the monitor via the headphones port.
Connect as illustrated. The port is used only for “Service”.
yPeripheral devices are sold separately.
yIf you use angled earphones, it may cause a problem
with connecting another external device to the
monitor. Therefore, it is recommended to use straight
earphones.
yDepending on the audio settings of the PC and
external device, headphones and speaker functions
may be limited.
NOTE
Angled Straight
SERVICE ONLY
19
ENGLISH
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
20
ENGLISH
Each option is described below.
Customizing settings
Menu Settings
-Quick Settings
1 To view the OSD menu, press the joystick button at the bot-
tom of the monitor and then enter the Menu.
2 Go to Quick Settings > Brightness by moving the joystick.
3 Configure the options following the instructions that appear in
the bottom right corner.
4 To return to the upper menu or set other menu items, move the
joystick to ◄ or pressing ( / OK) it.
5 If you want to exit the OSD menu, move the joystick to ◄ until
you exit.
Menu > Quick Settings Description
Brightness Adjusts the color contrast and brightness of the screen.
Contrast
Volume Adjusts the volume.
NOTE
yYou can adjust Mute/ Unmute by moving the joystick button to ▼ in the Volume menu.
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.
1:1 The aspect ratio is not adjusted from the original.
NOTE
yThe display may look the same for Wide, Original, and 1:1 options at the recommended resolution.
yThe ratio is disabled in the interlaced signal.
Quick Charge
21
ENGLISH
Each option is described below.
-PBP
1 To view the OSD menu, press the joystick button at the bottom
of the monitor and then enter the Menu.
2 Go to PBP by moving the joystick.
3 Configure the options following the instructions that appear in
the bottom right corner.
4 To return to the upper menu or set other menu items, move the
joystick to ◄ or pressing ( / OK) it.
5 If you want to exit the OSD menu, move the joystick to ◄ until
you exit.
Quick Charge
Menu > PBP Description
Sub Displays the screens of two input modes on one monitor.
PBP Connection Sub Screen (Right)
HDMI 1 HDMI 2 DisplayPort USB-C
Main Screen
(Left)
HDMI 1 - - O O
HDMI 2 - - O O
DisplayPort O O - -
USB-C O O - -
Sound Out Changes the audio output in PBP mode.
Swap Toggles between the main screen and sub screen in PBP mode.
Sub Full Converts the sub screen of PBP mode to the wide screen.
Ratio Adjusts the aspect ratio of the main screen or sub 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 screen.
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.
NOTE
yWhen the Sub mode is Off, Sound Out, Swap, Sub Full, and Ratio menus become disabled.
The Main/Sub options for Ratio become disabled if there is no signal.
yThe optimal resolution for PBP mode is set automatically when PBP mode is set.
22
ENGLISH
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.
sRGB A standard RGB color space for the monitor and printer.
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.
DICOM Optimizes the screen for viewing X-ray images. You can brighten the screen in the OSD menu.
NOTE
yThis product has been approved as an IT device and not as a medical device. It is
intended for office use only. (It may be used for education and reference purposes
but not for medical diagnosis.)
Calibration 1 Adjusts to the last calibrated screen.
Calibration 2 Adjusts to the previously calibrated screen.
NOTE
yIf the picture mode is changed in the DP (DisplayPort) input, the screen may flicker or the
resolution of your PC screen may be affected.
yCalibration 2 : Installation of TRUE COLOR PRO and proceeding Calibration will enable this
menu.
Each option is described below.
-Picture
1 To view the OSD menu, press the joystick button at the bot-
tom of the monitor and then enter the Menu.
2 Go to Picture by moving the joystick.
3 Configure the options following the instructions that appear in
the bottom right corner.
4 To return to the upper menu or set other menu items, move the
joystick to ◄ or pressing ( / OK) it.
5 If you want to exit the OSD menu, move the joystick to ◄ until
you exit.
Quick Charge
23
ENGLISH
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 im-
ages.
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).
yOffset: as a reference for a video signal, this is the darkest color the moni-
tor can display.
High Keeps the current contrast ratio of the screen.
Low Lowers the black levels raises the write 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 Format1)
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.
DFC Adjusts the brightness automatically according to the screen.
NOTE
yIf the connected device does not support ULTRA HD Deep Color, the feature
may not work properly.
yIf a problem occurs, set the HDMI ULTRA HD Deep Color option to Off.
24
ENGLISH
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.
CAUTION
ySupported Interface: DisplayPort.
ySupported Graphic Card : A graphic card that supports AMD’s FreeSync
is necessary.
ySupported Version : Make sure to update the graphic card to the latest
driver.
yFor more information and requirement, refer to AMD website at http://
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.
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.
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
Manual Adjusts the color temperature in 500K increments. (Note that
9300K is supported instead of 9500K.)
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 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.
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
25
ENGLISH
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 front 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.
yBe 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
-General
1 To view the OSD menu, press the joystick button at the bot-
tom of the monitor and then enter the Menu.
2 Go to General by moving the joystick.
3 Configure the options following the instructions that appear in
the bottom right corner.
4 To return to the upper menu or set other menu items, move the
joystick to ◄ or pressing ( / OK) it.
5 If you want to exit the OSD menu, move the joystick to ◄ until
you exit.
Quick Charge
Each option is described below.
NOTE
ySaving 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.
26
ENGLISH
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.
yWhen Quick Charge is set to On, data transmission through the USB1/2 port is not available (e.g. con-
necting your keyboard, mouse, or other USB storage devices to the monitor).
NOTE
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.
yAll features are disabled except Brightness, Contrast, Volume, Input in Quick Settings, and OSD Lock in
General..
NOTE
27
ENGLISH
-Reset
1 To view the OSD menu, press the joystick button at the bot-
tom of the monitor and then enter the Menu.
2 Go to Reset by moving the joystick.
3 Configure the options following the instructions that appear in
the bottom right corner.
4 To return to the upper menu or set other menu items, move the
joystick to ◄ or pressing ( / OK) it.
5 If you want to exit the OSD menu, move the joystick to ◄ until
you exit.
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.
Quick Charge
28
ENGLISH
TROUBLESHOOTING
Nothing is displayed on the screen.
Is the monitor's power cord plugged in? yCheck if the power cord is correctly plugged into the power outlet.
Is the power LED on? yCheck the power cable connection and press the power button.
Is the power on and the power LED
displaying white?
yCheck that the connected input is enabled (Menu > Quick Settings > Input).
Is the power LED blinking? yIf the monitor is in sleep mode, move the mouse, or press any key on the
keyboard, to switch the display on.
yCheck if the computer is turned on.
Is the OUT OF RANGE message being
displayed?
yThis 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? yThis 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?
yThe 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?
yDisplaying a still image for a prolonged time may cause damage to the screen,
resulting in the retention of the image.
yTo 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? yIf the selected resolution is HDMI 1080i 60/50 Hz (interlaced), the screen may
be flickering. Change the resolution to 1080P or the recommended resolution.
PC(or USB host device) cannot detect USB peripheral connected to USB-A port.
Did you change the OSD Menu
“Quick Charge” off?
yWhen set “Quick Charge” On, device will be charged quickly, but cannot
use USB data.
yWhen Set “Quick Charge” Off, device will be charged slowly, and can use
USB data.
NOTE
yVertical 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.
yHorizontal 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.
29
ENGLISH
The display color is abnormal.
Does the display appear discol-ored (16
colors)?
ySet the color to 24 bit (true color) or higher. In Windows, go to Con-trol Panel >
Display > Settings > Color Quality.
Does the display color appear unstable or
monochrome?
yCheck if the signal cable is connected properly. Reconnect the cable or reinsert
the PC's graphics card.
Are there spots on the screen? yWhen 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? yBe sure to install the display driver from the display driver CD (or diskette) that
comes with your display. Or, you can also download the driver from our web site:
http://www.lg.com.
yMake sure to check if the video card supports Plug&Play function.
yCheck 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.
yNot 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.
yThe 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.
ySome graphics cards may not support 3840x2160 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?
yTry increasing the volume using the button on the monitor.
ySet 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.
30
ENGLISH
SPECIFICATIONS
27UD88
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 56Hz to 61 Hz
Input Connector HDMI IN1, HDMI IN2 , DP(DisplayPort) IN, H/P ,USB-C,USB( ) 1, 2
Power Voltage 19 V 6.5 A
Power consumption (Typ.) On mode: 29 W (ENERGY STAR® standard)*
Sleep Mode ≤ 1.2 W
Off Mode ≤ 0.3 W
AC/DC adaptor Type LCAP31, LIEN CHANG ELECTRONIC ENTERPRISE production
Output: 19 V 7.37 A
Environmental Con-
ditions
Operating Conditions Temperature 0 °C to 40 °C
Humidity Less than 80 %
Storing Condition Temperature -20 °C to 60 °C
Humidity Less than 85 %
Stand Angle Adjust-
ment
Forwards/Backwards: -3° to 20° (Head)
Dimension Monitor Size (Width x Height x Depth)
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
Weight (Without
Packaging)
With Stand 6.2 kg
Without Stand 4.7 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.
* ENERGY STAR® is a US registered mark of the United States Environmental Protection Agency.
31
ENGLISH
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 +/-
1920 x 2160 133.29 60 +/- Recommended resolution
for PBP
3840 x 2160 67.5 30 +/-
3840 x 2160 135 60 +/- When HDMI ULTRA HD Deep Color
is set to ON.
DisplayPort/ USB-C
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 +/-
1920 x 2160 133.32 60 +/- Recommended resolution
for PBP
3840 x 2160 66.66 30 +/-
3840 x 2160 133.32 60 +/-
32
ENGLISH
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
33
ENGLISH
PROPER POSTURE
Proper Posture for Using the Monitor
Adjust the screen so that you can comfortably view at a slight downward angle from your natural eye level.
yTake a break for approximately ten minutes every hour to reduce any fatigue caused by long-time usage.
yThe stand of the touch monitor allows the product to be used in the optimum position.
Adjust the stand angle to obtain the best view of the screen.
You should be looking slightly
down at the screen.
Place your hands gently on the
keyboard, keeping your arms bent
at the elbows and extended hori-
zontally in front of you.
Adjust the angle
So that there is no reflection or
glare from the screen.
This device meets the EMC requirements for
home appliances (Class B) and is intended for
home usage. This device can be used in all regions.
Read the owner's manual (CD) carefully and keep
it at hand. Please note that the label attached to
the product provides information for technical
support.
MODEL
SERIAL
*above information is only for USA FCC Regulatory
Declaration of Conformity
Trade Name: LG
Model : 27UD88
Responsible Party: LG Electronics Inc.
Address : 1000 Sylvan Ave. Englewood Cliffs
NJ 07632 U.S.A
TEL: 201-266-2534
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.
ENERGY STAR® is a set of power-saving guidelines issued
by the U.S.Environmental Protection Agency (EPA).
As an ENERGY STAR® Partner 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.