• 4K UHD (3840 x 2160) IPS
  • HDCP 2.2 Compatible
  • USB Type C™
  • 4x HDMI Inputs
  • On Screen Control
  • Factory Calibrated
43" Class 4K UHD IPS LED Monitor (42.5" Diagonal)


    • DC Off
    • 1.2W
    • Type
    • Built-in Power
    • Input
    • 100-240Vac, 50/60Hz
    • Normal On (factory out condition Typ.)
    • 70W
    • Power Save/Sleep Mode (Max.)
    • 1.2W


    • UL(cUL)
    • Yes
    • FCC-B, CE
    • Yes
    • CB
    • Yes
    • KC
    • Yes
    • Yes
    • Windows 10
    • Yes
    • ErP
    • Yes
    • DisplayPort
    • Yes


    • Shipping Weight
    • 44.1 lbs
    • With Stand (WxHxD)
    • 38.1" x 25.5" x 10.8"
    • Without Stand (WxHxD)
    • 38.1" x 22.6" x 2.8"
    • Shipping Dimensions (WxHxD)
    • 41.9" x 25.9" x 11.2"
    • With Stand Weight
    • 35.1 lbs
    • Without Stand Weight
    • 27.1 lbs


    • DDC/CI
    • Yes
    • HDCP
    • HDMI2.0 Yes (2.2), DP Yes (2.2)
    • Remote Control
    • Yes (2x AAA batteries included)
    • Super+ Resolution
    • Yes
    • PIP/PBP
    • Yes (2PIP)
    • PBP (Picture by Picture)
    • Yes (4PBP)
    • Factory Calibration
    • Yes
    • Reader Mode
    • Yes
    • Six Axis Control
    • Yes
    • Black Stabilizer
    • Yes
    • DAS Mode
    • Yes
    • On Screen Control
    • Yes


    • Limited Warranty
    • 1 Year Parts & Labor
    • UPC
    • 719192614604


    • Screen Size Class (diagonal)
    • 42.51"
    • Color Depth
    • 1.06Billion Color
    • Pixel Pitch (mm)
    • 0.2451 x 0.2451


    • Refresh Rate
    • 60Hz
    • Resolution
    • 3840x2160
    • Panel Type
    • IPS
    • Aspect Ratio
    • 16:9
    • Brightness
    • 350cd/m2
    • Color Gamut
    • NTSC 72%
    • Response Time
    • 5ms GTG
    • Contrast Ratio (DFC)
    • Mega
    • Viewing Angle
    • 178 / 178
    • Surface Treatment
    • Anti-Glare


    • Display Port
    • USB-C
    • Yes (1)
    • USB down port
    • Yes (2)
    • HDMI
    • Yes x4 (ver 1.4 x2, ver 2.0 x2)


    • Detachable Base
    • Yes
    • Tilt (Angle)
    • Yes (-5~10)


    • Power Cord
    • Yes
    • HDMI™
    • Yes
    • Display Port
    • Yes
    • Wall mount size (mm)
    • 200 x 200
    • USB Type A to C
    • Yes (Gender)
    • Cable Holder
    • Yes
    • Easy Setup Guide
    • Yes
    • Calibration Report (Paper)
    • Yes
    • Remote Control
    • Yes (2x AAA batteries included)


    • Audio Output
    • 10W x 2


    • Dual Controller
    • Yes
    • S/W Install CD
    • Yes (OnScreen Control, Dual Controller)

What people are saying

Rated 5 out of 5 by from Disappointed that LG discontinued the Model. I've got 4,000+ hours on my monitor with no issues. I'm blessed. I went from three 27 inch monitors to one 42.5 in monitor to do the same work. It's amazing.
Date published: 2022-03-23
Rated 5 out of 5 by from Works as a monitor and TV The fact it’s completed both of my needs is phenomenal
Date published: 2021-09-02
Rated 5 out of 5 by from Great picture and surprisingly deep sound Like the title says. Superb Monitor. Amazing Color with decent response time (60hz low gtg). The sound is deep and crisp.
Date published: 2021-05-02
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Ask your questions. Share your answers.
Please review the detailed product information and help guides in the
Product Support section for this product prior to posting a question.

I have a 2020 M1 MacBook Air with a Thunderbolt 3 compatible USB-C cable.  PbP does not display the correct resolution. Do I need a USB-C to DisplayPort adapter?  Full screen displays 3840x2160 as it should.  Side-by-Side does not.  Thank You!

Asked by: VinnB
In PBP mode on the LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B you are running two external video input sources simultaneously on the screen using your preferred choice of inputs so you are not going to get the full 4K (3840 x 2160) resolution for each screen. A vertical split will give you two 1920 x 2160 pixel screens (i.e. the horizontal pixels are cut in half for each screen, which is 3840 divided by two which equals 1920 pixels and the vertical pixels remain the same which is 2160 pixels)...^Ivan
Answered by: Ivanf
Date published: 2021-07-29

I have this monitor and it is only refreshing at 30hz. How can I get it to display at the 60hz listed in the specs? I lost the manual and can't find one online.

Asked by: jackie27777777
Please visit the support page at to access the Owner's Manual. To achieve 60Hz with a resolution of 3840 x 2160 the HDMI ULTRA HD Deep Color should be set to ON. If you need further assistance, please reach out to our support team on Twitter via @LGUSSupport or on Facebook at ^Daphane
Answered by: LG Electronics
Date published: 2021-01-17

My PC has a quad card with 4 DP outputs. I'm reading that there are problems with dp to HDMI cables being used. Does this mean I need to have a video card with 4 HDMI outputs?

Asked by: Gpk1
The LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B comes with a DisplayPort cable as an included accessory. Regrettably, we are not aware of the problems of using DP to HDMI cables and cannot comment on that without knowing what the specifications are for those DP to HDMI cables. The monitor also has a USB-C port on it in addition to the 4 x HDMI ports and the DisplayPort. Two of the HDMI ports are HDMI 1.4 ports and the other two are HDMI 2.0 ports...^IFV
Answered by: Ivanf
Date published: 2020-01-31

Can you tell me the dimension in inches of the recessed 200x200 VESA mount space? I need to ensure the adapter I buy will fit within that space & will not overlap that space so I have a solid mount that won't crack the plastic case...

Asked by: xpert
Regrettably, specifications for the recessed area where the VESA Mount bolt holes are located on the LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B are not listed in the products specifications nor in the owner's manual. Please contact our Support Center at (800) 243-0000 to inquire if they have access to CAD drawings for the monitor that might have the pertinent information...^IFV
Answered by: Ivanf
Date published: 2020-09-09

I just got this monitor in and need to connect it to my MacBook Pro. What exactly do I need to buy in order to make this happen? I'm not tech savvy so basic terms will be more helpful.

Asked by: Jan3377
For assistance with using your monitor, please give our computer specialists a call at 800-243-0000.
Answered by: ChrisPSM
Date published: 2019-12-19

I just purchased a 16 inch MacBook Pro and want to connect it directly with the Thunderbolt 3 cable. Will Thunderbolt 3 to Thunderbolt 3 work? Or Thunderbolt 3 to USB-C? I’m a bit confused with what the right cable I’ll need. 

Asked by: jg6021
The LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B is not a Thunderbolt display. The monitor has a DisplayPort, USB-C and HDMI Ports on it. You can use a Thunderbolt 3 to DisplayPort 4K @ 60 Hz Adapter or find a dock that you can make the appropriate connections with if you do not want to carry adapters around. The Thunderbolt 3 ports in the MacBook Pro and MacBook Air work with USB-C devices, which have the same connector shape. If you want to use a USB-C device, you can just plug it into one of the Thunderbolt 3 ports. No adapter is necessary...^IFV
Answered by: Ivanf
Date published: 2020-11-19

Presently I have a TV as my monitor and I have a marantz receiver using one of the HDMI ports. I use that for my sound and my XBOX and PS4 are also hooked into it. Would I be able to replicate that setup using this monitor?

Asked by: JVAL
The LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B has a native resolution of 3840 x 2160, a native refresh rate of 60 Hz, it features 4 x HDMI ports (ver 1.4 x2, ver 2.0 x2).The HDMI 2.0 ports are all HDCP 2.2 compliant...^IFV
Answered by: Ivanf
Date published: 2019-10-18

What is the procedure for using one keyboard and mouse connected to the 43UD79-B USB ports to access any of the four HDMI connected thin client computers?

Asked by: Frank101619
You will need to download and install LG's Dual Controller software to all your computers that you will be connecting to the LG 43'' Class 4K UHD IPS LED Monitor (42.5'' Diagonal), Model # 43UD79-B, Dual Controller 2.62 for Windows or Dual Controller 2.59 for Mac from the support page on our site, Dual Controller is an application software that lets the user control multiple Windows and Mac systems using the shared keyboard and mouse attached to one computer. It is designed for the people who often use more than one system which are placed near to each other. With Dual Controller Software, the user can share a single keyboard/mouse across a set of systems (Windows/MAC). The software is packaged as an Install Shield installation package...^IFV
Answered by: Ivanf
Date published: 2019-10-18
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