LG Electronics 42.5" Screen LED-lit Monitor (43UD79-B)

4.3 out of 5 stars 368 ratings

Specific Uses For Product Personal, gaming, business
Refresh Rate 60 Hz
Brand LG
Screen Size 42.5 Inches
Total HDMI Ports 4

About this item

    This fits your .
  • Make sure this fits by entering your model number.
  • 43- inch UHD 4K (3840 x 2160) IPS monitor
  • HDCP 2.2 compatible
  • USB Type C connectivity
  • 4x HDMI input. Viewing Angle-178 / 178
  • On screen control with screen split

Special offers and product promotions

  • Create your FREE Amazon Business account to save up to 10% with Business-only prices and free shipping. Register today

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question might be answered by sellers, manufacturers, or customers who bought this product.

Please make sure that you are posting in the form of a question.

Please enter a question.

From the manufacturer

43UD79-W 38UC99-W 34UC99-W 32UD99-W
Screen Size 43" 38" 34" 32"
Curved Panel No Yes Yes No
Aspect Ratio 16:9 21:9 21:9 16:9
Resolution 3840 x 2160 (4K) 3840 x 1600 (WQHD+) 3840 x 1440 (WQHD) 3840 x 2160 (4K)
FreeSync No Yes Yes No
USB Type-C Yes Yes Yes Yes

Compare with similar items

LG Electronics 42.5" Screen LED-lit Monitor (43UD79-B)
LG 43UN700-B 43 Inch Class UHD (3840 X 2160) IPS Display with USB Type-C and HDR10 with 4 HDMI inputs, Black
Dell U4320Q 43 Inch 2160p 4K UltraSharp, IPS Thin Bezel Monitor, HDMI, DisplayPort, USB-C, VESA Certified, Black
Dell S3221QS 32 Inch Curved 4K UHD, VA Ultra-Thin Bezel Monitor, AMD FreeSync, HDMI, DisplayPort, Built in Speakers, VESA Certified, Silver, Latest Edition
LG 43UN700T-B 43" 4K UHD 3840x2160 IPS USB-C HDR 10 Monitor
Customer Rating 4.3 out of 5 stars (368) 4.4 out of 5 stars (564) 4.6 out of 5 stars (174) 4.4 out of 5 stars (681) 4.4 out of 5 stars (111)
Price From $2,891.00 $699.99 $879.00 $399.99 $696.99
Sold By Available from these sellers shopping solutions.LLC Beach Camera Same Day Shipping
Aspect Ratio 16:9 16:9 16:9 21:9
Display Resolution Maximum 3840 x 2160 pixels 3840 x 2160 pixels 4K 3840 x 2160 pixels 4K UHD 3840 x 2160 3840 x 2160 pixels
Screen Size 42.5 inches 42.5 inches 43 inches 32 inches 43.00 inches
Item Dimensions 38.1 x 10.8 x 25.5 inches 38.1 x 10.8 x 25.5 inches 30.08 x 9.8 x 29.1 inches 27.92 x 8.15 x 20.4 inches 38.1 x 9.2 x 24.6 inches
Item Weight 25.10 lbs 38.58 lbs 38.80 lbs 16.25 lbs 32.20 lbs
Mounting Type VESA Compatibility - Mountable: 200 x 200 mm Wall Mount Wall Mount Wall Mount
Refresh Rate 60 hertz 60 hertz 60 60 hertz 60 hertz
Size 42.5-Inch 32"

Product Description

The 43UD79 combines Ultra HD 4K resolution (3840x2160) with IPS clarity in a huge 43 inch class display. It offers compact, versatile USB Type-C connectivity plus it's HDCP 2.2 compatible for great content viewing options.

Product information

Technical Details

Collapse all

Additional Information

Warranty & Support Return Policy:You may return any new computer purchased from that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.


Would you like to tell us about a lower price?

Product guides and documents

Close Lightbox

Customer Questions & Answers

Customer reviews

4.3 out of 5 stars
4.3 out of 5
368 global ratings

Top reviews from the United States

Reviewed in the United States on December 27, 2017
Customer image
5.0 out of 5 stars Very enjoyable large, 4K display for productivity
By SCMX on December 27, 2017
I wrote this same review on a few other sites in case you are looking around, but they had character limits, so this review is a bit more in depth.

Well, here's my review of this LG 43". Let me set the stage so you can understand the context of where I'm coming from for this review.

I've been running 4x Samsung SyncMaster 930Bs since 2005 (19", 5:4); yes, that's 12 years on the same monitors. They were good for what they were and served me well. However, I finally updated my 8 year old workstation to a new Ryzen build and the time was right for a display update.

I contemplated doing 4x 27" displays in portrait, 3x 32" in portrait, or 2x 43 in landscape. I put together over 30 monitor models into a spreadsheet with every data spec and leveraged them against each other to find the optimal buy for my situation. I spent 18 months going back and forth slowly narrowing it down. In the end, due to some dimensional constraints in my studio, the 3x 32" would not fit and I wasn't sure I wanted to have 4x 27" since I was coming from 4x 19". It just felt redundant and didn't eliminate some of the issues I wanted to overcome, such as changing inputs manually on each monitor to signal a different box.

It was down to essentially the 43" " 34"; 4K displays on the market; the Acer, Dell, LG, and Viewsonic. The Acer and Viewsonic used the same TP Vision panel that seemed to have some issues with image retention, red-orange splotchy lag, and a few others. The LG and Dell both use a LG panel. What sold me was two points: 1.) The price; $650 each for the LG vs. $900 each for the Dell and 2.) the remote control.

So, I ordered my two LG's and waited a week for them to arrive. First impression: This monitor is BIG. I felt a little ridiculous when the poor UPS driver had to lug these to the door. They are the size of a medium TV really... I took them up to my studio and took one out. It still is HUGE. Plugged it in with a 15' DP cable I purchased (the max length specked by VESA for the DP interface) and there it was, glorious ginormous BIOS screen. I loaded into Win10 and it was a magnificent feeling. I'm going to say it one more time, this monitor is HUGE.

I've been using my two displays for about two months now. I have them mounted to the wall with some Ergotron LX HD Sit-Stand Wall Mount LCD Arm - Wall Mount (which I reviewed here on Amazon) and I've been loving them. They no longer seem huge, but just right. Having to use anything smaller is a struggle now. 76" @ 8K is where it's at; measuring diagonally across both displays.

So, some technical information about this display. I work a day job but run my own side business. I work in Autodesk CAD/Inventor, SolidWorks, Adobe CC (Audition, Photoshop, InDesign, InCopy, Illustrator, Dreamweaver), Corell, Inkscape/G.I.M.P./Scribus, MS Office, LibreOffice, Cubase, and some fashion CAD programs. I do a lot and need essentially a monitor that could handle it all. The only "game" I play is EverQuest 1, which is nearly a 20 year old MMORPG. It handles that perfectly fine.

I'm power these monitors with an AMD Radeon Pro WX 5100, for your reference. This card has 4x DP1.4 outputs and is capable of running 4x 4K monitors @ 60Hz. It is a professional card made for heavy work. Consumer/gaming cards will perform differently, so plan accordingly for your configuration.

This monitor is not made for precision design/graphic/motion picture/photography/etc. work. However, it can function perfectly fine in this role. The monitors came pre-calibrated with a certificate sheet in each box. I only had to do a little bit of tweaking to get them to where I needed. I also adjusted the contract and brightness down. I keep the brightness at about 30 at night and 60 during the daytime. I'm so used to using bad TN panels over the past two decades, that I calibrate my monitors and design working space for my project specific needs, illuminating the need for precision color in my work. A proper monitor for this work is always preferred, but they would have set me back over $4,000 vs. the $1,300 I paid for two of these. It wasn't worth it for me.

I'm disappointed in the lack of DisplayPort inputs, 1 is pretty pathetic, though there is a USB-C/DisplayPort input, which technically qualifies it as 2 inputs. HDMI is a proprietary input and there is a royalty that the end-user ends up paying to have it. Additionally, it's an entertainment input; I'm guessing this monitor is geared more towards the consumer than the creator. What makes it worse, is HDMI inputs 1 + 2 are only 30Hz. I'm using one of them now for an auxiliary box and it's pretty laggy. Luckily I don't care about that machine, but it's still annoying. HDMI 3 +4 do function at 4K @ 60Hz perfectly fine.

The stand does not have any height adjustment but functions fine and does its job; I tried it briefly before storing them as these displays are wall-mounted for my use.

Speakers, it has stereo sound. Perfect for the dings and pings of your operating system. Good enough for telephony, VOIP, voice audio. But if you want music or entertainment, get real speakers; in-monitor speakers are not for that. I'm happy with the speakers for OS sounds. Surprisingly, these speakers are pretty good. I've heard some pretty bad monitor speakers over the years, but you can actually enjoy music out of these. They also are very loud, unlike most monitor speakers. Don't forget, they are monitor speakers and not stand alone, so the quality will always be lacking, but I'm really impressed with them; the best monitor speakers I've ever heard.

The on/off/menu button. It's a little dongle under the monitor. I'm not crazy about it and wish there was just a few buttons on the front bezel or back instead; oh well. You can hold the dongle button for 6 seconds to shut off power, or press it up and then in to shut off. You can also change inputs using the dongle and volume/mute.

The white LED power light is pretty weak and I almost can never see it. Only visible in a completely dark room. I wish it was brighter especially since it is on the bottom of the monitor, pointing down towards your desk. In fact, it's so weak, I don't see it looking at the monitor, but instead in the reflection of my semi-gloss desk.

The remote. This was a huge selling point. I can adjust inputs much more easily with this. The downside is if you are running 2 or more of these monitors, the remotes all operate on the same frequency or channel. In other words, one remote controls all the displays! I wish it at least had a dip-switch in the battery compartment for channel 1 or 2; like many cordless ceiling fans have. It's very convenient and I love this remote! I use it all the time for input switches and for Picture-by-Picture.

PbP/PiP feature - LOVE this feature and was mandatory for my purchase. I'm running 4 boxes total and need to view different machines at different times. I can now do that easily without having to switch inputs like I had to before. The PiP feature is kind of annoying to me, since it places a rectangle over the main input; which will of course block something eventually, but the PbP feature is GREAT!

It's true, there is some strange effect occurring in about the outer most 10 pixels of the panel. If you look straight on center of the display at about 30" , you're good. As soon as you look at an angle, you notice this black line along the bezel. Either there is a reflection bouncing around inside the display, or you are seeing "through" the panel at the back bezel. I got used to it and it doesn't interfere with my UI's. See the two images I've added about this.

I have no IPS glow really, I was totally afraid of these after seeing so many bad reviews of 43", 4K monitors in general. The screen has a very low glow, as it has to since the LED's push light through the panel to illuminate it, but it's the lowest amount of glow I've seen in the few IPS monitors I've used at offices. It's pretty darn close to my old TN panels from 2005. I'm very happy.

The colors look great and doing photography retouching on such a huge screen is a dream come true. Everything is so big and clear and I can see more of an image at once. CAD files are also great since you can see so much more at once.

Pro Tip: If using Win10, you can snap windows to quadrants by bringing your window to any corner. This feature is sweet having just come from Win7 and only having the two side snap options. Makes you much more productive.

LG offers a software download for a bit more functionality including color/brightness adjustment and a more advanced snapping-type feature than what Win 10 offers. I've only used it to update the firmware on my monitors, but it could be usefull for some.

So, overall I'm completely in love with my two new screens. Hoping to have these for 10 years+ like my last monitors. Hope this review was helpful and good luck!

UPDATE 1: One year running and I still love this monitors. No issues. I've had to move recently and really wish I had gotten 32" monitors instead, but then I look at what LG has and none seem to have 4+ inputs with a remote and PBP function. So effectively, these are the best monitors on the market for me and I'll just have to keep dealing/enjoying with their hugeness.

UPDATE 2: I included two images of the mouse at the edge of the monitor to show what it looks like viewing straight on (you can fully see the mouse over the MS Start button, right up the monitor bezel) and then at an angle, essentially most of the mouse pointer "vanishes". This doesn't bother me; I've gotten use to it, but others seem to struggle with it.
Images in this review
Customer image Customer image Customer image
Customer imageCustomer imageCustomer image
463 people found this helpful
Report abuse
Reviewed in the United States on July 17, 2017
Verified Purchase
176 people found this helpful
Report abuse
Reviewed in the United States on August 29, 2017
Verified Purchase
45 people found this helpful
Report abuse
Reviewed in the United States on August 10, 2017
Verified Purchase
40 people found this helpful
Report abuse

Top reviews from other countries

Temo Canada
4.0 out of 5 stars Canadian orders do not ship with the required USB cable
Reviewed in Canada on June 18, 2018
Verified Purchase
Customer image
4.0 out of 5 stars Canadian orders do not ship with the required USB cable
Reviewed in Canada on June 19, 2018
This review is for the LG 43UD79-B 42.5" Screen LED-Lit Monitor

**Important Note: For Canadians buying from, you will need to make sure that you have the required USB C cable for the very necessary firmware upgrade, or buy one if you purchase this monitor. It is not included. More below

My monitor shipped with a 6ft power cable, a 6ft DP cable, a 6 ft HDMI cable and a USB 3 type A male to type C female adapter - but again, not the required USB cable.


- One of the cheaper 43” options
- After calibration colors are very good (not superb but very good)
- Comes with a remote. That is a fantastic feature & super handy. It made me wish all monitors shipped with remotes to access the menu.
- Multiple inputs and screen split, Picture by Picture or PiP options, controlled by either hardware or software. your mileage may vary though.
- You can use multiple inputs from a single source.
- 6ft long power cable that does not use a power brick

EDIT Amended: The 10 bit color is actually not true 10 bit. It's 8 bit + FRC

- a small ~ 10 pixel screen border where items or text appear slightly blurred only if viewing the screen off angle. It was a non issue for me, but it's worth mentioning

- This monitor is not flicker free. It uses PWM. There is a firmware update to try and resolve this, but I found even with the firmware update applied it was difficult to look at this monitor for more than a few hours before my eyes became sore. This is only if you are sensitive to PWM flickering. For me it it made the monitor unusable.

- Even though this monitor is calibrated out of the box the colors seem slightly washed out to me. This is made slightly more complicated by the fact that there is a lack of a single saturation setting to raise overall saturation. That alone would make things so, so much easier. More further below

- For Canadian orders the monitor does not ship with the required USB Type C cable. More on this further below.

- The 200 x 200 mm VESA mounting holes are in a square area that is both recessed (1 inch deep) and has many vertical tabs protruding into the recessed area potentially blocking many aftermarket mounting solutions.

- No height adjustment if using the supplied stand.

- Only one year warranty. The industry standard on most monitors is at least two years, and usually three. That doesn’t inspire purchasing confidence for this model. But LG seem to offer only one year on a lot of their monitors, unlike most other brand name companies.

Further notes:

Screen split is basically handled in two ways; one by hardware and one by software. If you plug multiple cables into this monitor, either from multiple devices or from a single device multi out like a GPU, then you can use the on screen controls, or the remote to switch inputs or access multiple inputs at once in a split screen, PiP or PbP configuration. So that is accessing split screen by hardware.
But the On Screen Display software can also create the same thing, but with customization that can be saved as templates - all software based. You can have only one device (one cable) plugged into the monitor and still create split screen. It’s LG’s proprietary version of other 3rd party software setups like display fusion, except display fusion does it much better.

Hardware based input switching via remote was kind of flaky - even after the firmware update. If you plug in multiple cables It correctly displays the configuration you boot to, but if you then select another configuration it doesn’t seem to play nice with Windows. I even reinstalled Windows 10 hoping for better results. It works best if you make your changes then reboot. So switching on the fly via the remote didn't work for me. For that you can use the On Screen Display software to split the monitor, but LG’s implementation of this is inferior to something like Display Fusion (but that software costs $30). Be prepared to save your work and then restart the PC any time you select a new input for the monitor. Vegas Pro 15 editing software did not play nice with this monitor, but that's also because Vegas Pro has it's own scaling problems.

For reference I was connecting multiple inputs from a desktop PC running Win 10 1803, using DP and HDMI outs on an MSI GTX 1080.

Re saturation adjust:

The menu uses the increasing popular six color menu style. Saturation is in the menu layer under: Picture > Color Adjust > Six Color – where you’ll find 12 independent sliders for Hue and Saturation of Red, Green, Blue, Cyan, Magenta and Yellow – but no independent slider to raise all saturation at once. That is a major oversight imo. If you’re using a colorimeter or a LUT to set the levels then this may be a non issue. But for an average user just trying to raise all color at once, and amateur-sleuth adjust, there is no way to do it without messing with multiple sliders in a hit and miss scenario. Great for minuscule, granular fine tuning; terrible for convenience. The monitor has your standard preset Picture Modes like Custom, Photo, Cinema, Dark Room, etc. YMMV with those. It has an independent Picture Adjust, but that only includes your standard Brightness, Contrast and Gamma – no saturation. So if you’re satisfied with the actual “balance” of color, raising it means potentially raising 12 sliders independently. And that’s without knowing whether that particular attempt will be enough. It's a very annoying method, it takes forever and requires tons of patience. Fortunately if you get it right it can then be saved.

Don’t use the included driver CD. There are two separate newer driver \ firmware downloads you’ll need from the LG site. This is for Windows 10:

1) The monitor drivers.
As of this writing (June 2018) the current driver for Windows 10 is on LG’s site for this monitor under Software, Firmware and Drivers > 43UD79 Win10 R3 Driver > file “” dated Nov 27 2017. This will allow you to go into Windows > Device Manager > Monitors and load the ULTRA HD.inf to change it from Win 10 Generic. It then loads and lists as LG ULTRA HD.

2) The more important and necessary download is the OnScreen Control software which functions as both a software control and firmware update platform. This is found on LG’s site under Software, Firmware and Drivers > [Windows] OnScreen Control - version 2.86 > file (date June 5 2018)

On launching this software it tells you “To update monitor software you must have a USB cable”. (the one that should be supplied but is not) This monitor “software” upgrade is also the firmware upgrade. Ignore the info about optionally using a Type A to Type B USB cable. That’s incorrect; this monitor doesn’t have a Type B uplink port like some other monitors. It has a Type C uplink port and It’s this Type C port you need to be plugged into from your source to do the firmware upgrade. What you need is either a USB 3 type C male to male cable (if your source also has Type C). Or the other more common option to connect is to use a USB 3 cable that is Type A male (from PC) to Type C male (on monitor).

You need this firmware upgrade:

1) to provide the necessary uplink power
2) to mnake sure the USB 3 Type A ports on the monitor continue to work properly (so they don’t disconnect randomly or provide insufficient power \ amps)
3) to install the "On Screen Display" software and
4) to ensure the hardware split screen options work without cutting out.

If you need to buy and include a USB cable from, I bought this cable [[ASIN:B0791YQG73 USB 3.0 Type C Cable 6.6FT,COOYA Long USB C Fast Charging Cable,Magnet Head Design Type C Charger Cable Cord for Samsung S8 Plus,Galaxy Note 8,Nintendo Switch,Moto Z Play,ZTE Axon 7,HTC 10,LG V20 G5]] It’s Type A male to Type C male and it worked for the firmware upgrade and to provide continuous uplink power. It’s rated for 5Gbps transfer and 3 amps, sufficient for the monitor’s two USB Type A ports (They are 0.9 and 1.9 amps)

Amazon and LG: how come there is no mention in the description that this USB cable isn’t included for Canadian orders from The required cable isn’t for luxury or peripheral; it’s necessary for the monitor to function properly.

All things considered, this 4K monitor is hard to beat at this price point for Canadian shoppers. After adjusting color the 4K content looks very good - not HDR TV good, but still it's rich. And the extra 4K real estate is great.

The PWM problem:
I returned the monitor because of the lack of flicker free. I tried the firmware update (dated June 5 2018 at time of writing this) That didn’t solve the problem for me. I tried LED bias lights behind the monitor but that made little difference. I tried flux and Iris software; that didn’t solve the problem either. My other monitors are Low Blue Light with Flicker Free tech. I never realized what a world of difference that makes until I tried this monitor. Not everyone is sensitive to this, or affected by PWM. If you know you're not affected then this monitor may be fine for you. In the end I couldn’t stand it. My eyes became way too sore looking at this and it also affected my sleep. So I ended up returning it.

A note on initial delivery.'s new contracted delivery standard for couriers is "OSNR" - Original Signature Not Required. Purolator just left this monitor sitting in the hallway, at the door of my 3rd floor apartment. There are 20 apartments on that floor in one long hallway. Luckily it wasn't taken. Purolator's counter is that it is up to Amazon to designate signature required, and Amazon bases this on purchase amount. So a $900 Plus (after tax) order is not enough to require a signature? How is it OK to leave a monitor this expensive just sitting in an apartment hallway? As a customer you sit in the middle of this terrible arrangement and reap the angst.
Images in this review
Customer image Customer image Customer image Customer image Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
114 people found this helpful
Report abuse
5.0 out of 5 stars Amazing ... Great value for a monitor
Reviewed in Canada on December 1, 2018
Verified Purchase
10 people found this helpful
Report abuse
Andrew Power
5.0 out of 5 stars Great for professional photography work!
Reviewed in Canada on January 14, 2020
Verified Purchase
5.0 out of 5 stars Apart from occasional and temporary video disconnects, this monitor works wonders.
Reviewed in Canada on September 1, 2020
Verified Purchase
Jayden Clark Kim
4.0 out of 5 stars I want bigger!
Reviewed in Canada on April 30, 2020
Verified Purchase