OWNER’S MANUAL (For Mac) Please read this manual carefully before operating your set and retain it for future reference. 27MD5KL 27MD5KLB www.lg.com Copyright © 2019 LG Electronics Inc. All Rights Reserved.
CONTENTS ENGLISH LICENSE------------------------------------------------- 2 LICENSE Each model has different licenses. Visit www.lg.com for more information on the license. IMPORTANT PRECAUTIONS---------------------------- 3 Thunderbolt and the Thunderbolt logo are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries.
IMPORTANT PRECAUTIONS Please read these safety precautions carefully before using the product. Failure to follow those warnings may result in death, serious injury or damage to the product or other property. Precautions to the AC Adapter and Electrical Power WARNING •• If water or any foreign substance goes inside the product (TV, monitor, power cord, or AC adapter), disconnect the power cord immediately and contact the service center.
ENGLISH •• Be sure to keep the outlet, AC adapter, and pins of the power plug clean from dust and etc. •• If you dropped the product or the case is broken, turn off the product and unplug the power cord. This may cause a fire. •• Do not unplug the power cord while the product is in use. Electrical shock can damage the product. •• As long as this unit is connected to the AC wall outlet, it is not disconnected from the AC power source even if the unit is turned off.
Precautions in Moving the Product WARNING You may be electrocuted or the product can be damaged. •• Make sure to remove all cables before moving the product. You may be electrocuted or the product can be damaged. •• When lifting or moving the product, do not hold it upside down while holding only the stand. This may cause the product to fall resulting in damage or injury. •• Do not shock the product when moving it. You may be electrocuted or the product can be damaged.
OPEN SOURCE SOFTWARE NOTICE INFORMATION ENGLISH 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.
Product Description Front Microphone and Ambient light sensor Camera indicator light ENGLISH Camera 7
Back Power connector ENGLISH Kensington lock hole Stand detach button NOTE •• The ambient light sensor is for auto brightness control of display and can be controlled by Mac OS.
Input Connector ENGLISH USB expansion port ThunderboltTM 3( ) / USB-C Host (Mac) connection port 9
ID Label / Sub ID Label You can view the monitor's ID Label and Sub ID Label.
ENGLISH Stand * Refer Detaching the Stand ID Label NOTE •• ID Label: the monitor's standard ID label that states model name, production date, country of production, specifications, etc. Sub ID Label: a secondary ID label that states only the model name and basic specifications. CAUTION •• To view the ID Label, you must detach the stand.
Moving and Lifting the Monitor ENGLISH 12 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. •• Place the monitor in the original box or packing material before attempting to move it. •• Before moving or lifting the monitor, disconnect the power cord and all other cables. •• Hold the bottom and side of the monitor frame firmly. Do not hold the panel itself.
Installing on a Table 1 2 Connect the power cord to the monitor and then plug the power cord into the wall outlet. Lift the monitor and place it on the table in an upright position. Place the monitor at least 100 mm (3.9 inches) away from the wall to ensure sufficient ventilation. 100 mm (3.9 inches) ENGLISH 100 mm (3.9 inches) 100 mm (3.9 inches) 2 1 100 mm (3.9 inches) CAUTION •• Unplug the power cord before moving or installing the monitor. There is risk of electric shock.
Cautions When Connecting Power Cord Adjusting the Stand Height 1 2 Place the monitor mounted on the stand base in an upright position. Handle the monitor with both hands for safety. ENGLISH 100-240 V ~ •• Make sure to use the power cord that is provided in the product package and connect it to a grounded power outlet. •• If you need another power cord, please contact your local dealer or the nearest retail store. Max 110.0 mm (4.
WARNING NOTE •• The left or right side of the monitor head can be slightly rotated up or down. Adjust the horizontal level of the monitor head. ENGLISH •• When adjusting the screen height, do not place your hand on the stand body to avoid injury to your fingers. •• Be careful not to touch or press the screen area when adjusting the angle of the monitor.
ENGLISH Adjusting the Angle Using the Kensington Lock 1 2 The connector for the Kensington security system is located at the back of the monitor. For more information on installation and usage, refer to the Kensington lock owner’s manual or visit the website at http://www.kensington.com. Connect the monitor to a table using the Kensington security system cable. Place the monitor in an upright position, mounted on the stand base. Adjust the angle of the screen.
ENGLISH NOTE •• The Kensington security system is optional. You can obtain optional accessories from most electronics stores.
Detaching the Stand 1 ENGLISH 2 18 3 Lift up the stand, slightly rotating it. 4 Pull the stand away from the monitor in its rotated position. Place the monitor’s screen face down. To protect the screen from scratches, cover the surface with a soft cloth. Push the Detach button on the back of the monitor to the left.
5 Check whether the hooks on the stand are separated from the slots of the main unit. 6 Remove the stand once the hooks on the stand have been released from the slots of the main unit. ENGLISH Stand hooks CAUTION •• Be careful not to drop the stand while detaching it.
Attaching the VESA design cover 1 ENGLISH 2 3 Push the VESA design cover in the slanted position until it touches the other side. 4 Push down on the VESA design cover. Place the monitor’s screen face down. To protect the screen from scratches, cover the surface with a soft cloth. Place the VESA design cover on the monitor in a slightly slanted position so its hooks can be inserted to the slots of the main unit.
Installing the Wall Mount Bracket Place the monitor’s screen face down. To protect the screen from scratches, cover the surface with a soft cloth. 2 Use four screws to attach the wall mount bracket.
NOTE NOTE •• Install the monitor at least 100 mm (3.9 inches) away from the wall on each side of the monitor to ensure sufficient ventilation. ENGLISH •• The wall mount bracket and the wall mount bracket screws are not included. CAUTION •• Be sure to attach the VESA design cover before attaching the wall mount bracket. •• If you use screws longer than the standard length, it may damage the inside of the product.
MAKING CONNECTIONS •• If you use generic cables not certified by LG, the screen may not display or there may be image noises. •• Do not press the screen for a prolonged time. This may cause image distortion. •• Do not display a still image on the screen for a prolonged time. This may cause image retention. Use a screensaver if possible. •• The plugs of the cable may become hot during operation. Do not touch the plug for a long time.
USB-C connection Please connect a USB-C host with USB-C cable. ENGLISH NOTE •• PD (Power Delivery) is supported via ThunderboltTM 3( ) / USB-C Host (Mac) port. •• Features may not work properly depending on the connected device’s specifications and the environment. •• ThunderboltTM 3( ) / USB-C Host (Mac) port is not for the Monitor Power source but for a PC power source. Connect the Power cord to supply power to the Monitor. •• Make sure to use the supplied cable.
Connecting to USB Device Power Delivery 5 V/1.5 A is supported via the USB expansion port. ENGLISH USB NOTE •• Peripheral devices are sold separately.
TROUBLESHOOTING ENGLISH Nothing is displayed on the screen. Is your monitor connected to your Mac? •• Connect your monitor to your Mac. The monitor will turn on automatically if the PC is operating normally. Is the monitor's power cord plugged in? •• Check if the power cord is correctly plugged into the power outlet. The screen retains an image.
The display color is abnormal. •• Check if the signal cable is connected properly. Reconnect the cable or reinsert the PC's graphics card. Are there spots on the screen? •• 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. ENGLISH Does the display color appear unstable or monochrome? The brightness cannot be adjusted.
PRODUCT SPECIFICATION The product specifications below may be changed without prior notice due to upgrade of product functions. ENGLISH LCD Screen Resolution Type TFT (Thin Film Transistor) LCD (Liquid Crystal Display) Screen Color Depth 8-bit, 10-bit color is supported. Pixel Pitch 0.11685 mm x 0.
Environmental Conditions Operating Conditions Storing Conditions Stereo Speakers Camera Built-in USB Camera Microphone Built-in USB Microphone Dimensions Weight (Without Packaging) 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 % ENGLISH Speaker Temperature Monitor Size (Width x Height x Depth) With Stand 625.6 x 464.4 x 239.9 (mm) (24.6 x 18.2 x 9.4 (inches)) Without Stand 625.6 x 375.1 x 53.8 (mm) (24.
Signal Timing ENGLISH 30 Resolution Horizontal Frequency (kHz) Vertical Frequency (Hz) Polarity (H/V) 640 x 480 31.469 59.94 -/- 3840 x 2160 133.32 60 +/- 3200 x 1800 111.12 60 +/- 2560 x 1440 88.86 60 +/- 5120 x 2880 177.
Supplier's Declaration of Conformity Trade Name: LG Responsible Party: LG Electronics USA, Inc. Address: 1000 Sylvan Ave Englewood Cliffs, NJ 07632 Telephone: (201) 266-2215 The model and serial number of the product are located on the back and on one side of the product. Record them below in case you ever need service. Model Serial No.
