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40" Class (39.5" Diagonal) UHD 4K Smart LED TV

  • 40UB8000

Key Features

  • 4K Resolution
  • Tru-4K Engine
  • HEVC Decoder
  • LG Smart TV
  • ENERGY STAR® Qualified
4K Resolution - Video

4K Resolution

ULTRA HD is a new standard in picture quality, and it's the future of high-end video display in the home. The resolution is four times that of Full HD 1080p*, with a whopping 8.3 million pixels to display flawless images, even when viewed up close. Enjoy incredibly vivid colors and picture details as never before.

Tru-4K Engine

Tru-4K Engine

Enjoy the benefits of 4K resolution today. LG's Tru-4K HD Engine upscales the picture through a multi-step data analysis that enhances the details of broadcasts, movies, sports and videogames to near-4K quality, giving you the superior viewing experience you expect from an ULTRA HDTV.

HEVC Decoder

HEVC Decoder

The recently developed HEVC (short for High Efficiency Video Coding) compression format is essential to ULTRA HD/4K, enabling next-generation video playback to meet the demands of UHD TVs. 4K video uses HEVC, and so the built-in HEVC decoder on this LG ULTRA HD television makes it ready to display 4K content.

LG Smart TV

LG Smart TV

Easily access premium content* from providers like Hulu Plus®, Netflix® and YouTube® directly from your TV. Customize your LG home dashboard with your most-used apps so you can spend less time navigating and more time on your entertainment.

Disclaimer: *Internet connection & certain subscriptions required and sold separately. Content and services vary by product and are subject to change without notice.

Premium 4K Resolution Content

Premium 4K Resolution Content

Looking for Ultra HD 4K Content? LG Smart TV's with Netflix now offer 4K resolution streaming video! Other streaming services have also begun to adopt 4K resolution with increased implementation expected in the years ahead. 4K source components—consumer video gear capable of outputting a true 3,840 x 2,160 signal—are now also on the market as well.

Disclaimer: *Internet connection & some subscriptions required and sold separately. Content and services vary by product and are subject to change without notice. **4K/UHD content delivery standards still being developed.

UCI 1080

UCI 1080

Specifically applied to LG Ultra HD televisions, our Ultra Clarity Index (UCI) is a rating that represents several key performance features and their ability to deliver the clearest possible picture. Inherently superior to current HD, UHD TVs with a UCI of 1080 offer a huge leap forward for clear, precise images even on demanding fast action such as sports and videogames.

Smart Share

Smart Share

LG gives you multiple ways to share those vacation photos, that family video or your favorite song on your TV, from a compatible device like a smartphone or tablet. Whether you link devices via your home network or send content directly from your laptop over WiDi, LG makes it easy for you to share what you like up on the big screen for friends and family to enjoy.

Disclaimer: *Internet subscription required and sold separately



Earning the ENERGY STAR® means a product meets strict energy efficiency guidelines set by the US Environmental Protection Agency and the Department of Energy. ENERGY STAR® certified televisions are on average, over 25 percent more energy efficient than conventional models, saving energy in all usage modes: sleep, idle and on.

Screen Size 40"
Premium VOD Services Netflix, Hulu Plus, Youtube and more
Media Share Yes
- Remote App Yes
- Network File Browser Yes
- YouTube Send-to-TV Yes
Screen Share Yes
- MHL (Mobile HD Link) Yes
- Miracast Yes
- WiDi Yes
Speaker System 2ch Speaker System
Audio Output Power (Watts - THD 10%) 20W
Mono/Stereo/Dual (MTS/SAP) Yes
Dolby® Digital Decoder Yes
DTS Decoder Yes
Sound Mode 6 Modes
Clear Voice II Yes
Sound Optimizer 3 Modes
Optical Sound Sync Yes
Wireless Sound Sync Yes
Wi-Fi® Built-in Yes
Wi-Fi Direct Yes
- Video DivX HD
- Photo JPEG
- Audio AC3 (Dolby Digital), EAC3, HE-AAC, AAC, MPEG, MP3, PCM, DTS
RF In (Antenna/Cable) 1 (Rear)
Component Video In(Y, Pb, Pr + Audio) 1 (Rear)
Composite In (AV) 1 (shared w/Component)
HDMII® 3 HDMI (1 Side, 2 Rear) *1 HDMI input supports HDCP 2.2
USB 3.0 3 (side)
Digital Audio Out (Optical) 1 (Rear)
LAN 1 (Rear)
RS-232 (mini jack) 1 (Rear)
ENERGY STAR® Qualified Yes
Power Supply (Voltage, Hz) 100V ~ 240V, 50/60 Hz
Standby Mode 0.3W
TV without Stand (WxHxD) 35.4" x 20.8" x 1.9"
TV with Stand (WxHxD) 35.4" x 22.4" x 8.54"
TV without Stand weight 23.0 lbs
TV with Stand weight 23.6 lbs
TV Shipping Dimensions (WxHxD) 38.7" x 24.3" x 5.6"
Shipping Weight 27.8 lbs
Limited Warranty 1 Year Parts & Labor
UPC 719192595248
Screen Size Class (diagonal) 40" Class (39.5" diagonal)
Resolution 3840 x 2160
Display Type LED
UCI (Ultra Clarity Index) 1080
Tru 4K Engine Yes
4K Resolution Upscaler Yes
Dynamic Color Enhancer Yes
Picture Mode 8 Modes
Aspect Ratio 6 Modes
Just Scan (1:1 Pixel Matching) HDMI/Component/RF - 1080i, 1080p, 720p
Real Cinema 24p (2:2 pull down) Yes
Picture Wizard III Yes
VESA® Size (mm) 200 x 200

What People Are Saying

Rated 5 out of 5 by from This Is Truely The Best TV I've Ever Bought I bought this TV a little over two months ago and I have to say it is truly the best TV I have ever owned. Words can't describe how beautiful the picture is. The sound is really good too. When I first hooked it up to my HD Digital Cable DVR I did notice some input lag.. but that was quickly fixed after switching it to "Game Mode", and after a bit of tweaking with the picture settings it went from amazing to unbelievable. I suggest you disable "Sports Mode" on all settings because there will be lag. My XBOX ONE games never looked better. I'd notice things that I would have never noticed on other HD TV's. There is barely any boarder around the TV is it's pretty much all TV. And with it being a SmartTV I no longer have to turn on my XBOX to watch Netflix. Plus with the USB inputs you can connect most USB keyboards and mice and browse with the installed web browser. However there are a few SLIGHT downsides. 1. You can not use the "Go Back" feature to switch back to previous inputs. Which means there is a 3 step process to switching inputs. You have to hit the "INPUT" button on your remote, then scroll over the the input you want, and then click "OK". 2. There is no custom input labeling you can name the inputs, but you have to choose on of the preset names. 3. The TV does take a few seconds to start up. All and all this is a great TV and I would suggest it to anyone that is in the market for a SmartTV
Date published: 2015-09-14
Rated 5 out of 5 by from Best TV I've ever had. Great picture resolution. The sound quality is great.
Date published: 2015-08-12
Rated 5 out of 5 by from UB8000 UHD TV I recently purchased the 40" LG UB8000 UHD TV from Best By Canada. It is great picture quality UHD TV in 4:20 resolution. I have not viewed any 1080 HD quality TV viewing or 4K only available on select NetFlex network packages. Looking forward to the 1st TV Network 4K Broadcast viewing on the market in the near future. Any comments when the TV Networks will broadcast in 4K resolution? The only complaint I have as I have read in previous reviews is the Low Sound when connected to my Digital Box and Home Theatre Sound System.
Date published: 2015-07-24
Rated 5 out of 5 by from Great 4K UHD TV at one of the best price on market The picture quality of this TV is great. Even old B&W movies look better on this TV. Easy to setup! Connect easy to your home wireless network so you can watch online channels. A good buy for me.
Date published: 2015-07-03
Rated 4 out of 5 by from Decent as a TV, but just OK as a 4k monitor The 4:2:0 makes it difficult to use as a 4k monitor at 60Hz. Also, the audio delay requires turning on the bypass feature. Lastly, the Super Resolution setting doesn't stay off between restarts.
Date published: 2015-04-25
Rated 2 out of 5 by from 4K Still trying to figure this product out, How to get the 4k crisper but other than that I love this TV and everything about it.
Date published: 2015-04-24
Rated 4 out of 5 by from OMG the color. I picked up this baby at BestBuy on sale.. Like a stupid crazy sale. The only way I can describe it is it's like you're looking out of a window and not watching a TV screen. Everything is crisp and sharp.. Just beautiful. I find the Sound lacks quality, however, I do have it connected to a home system sound bar and sub so I don't use the TV audio. I given it a 4 for that reason. But I do recommend the TV to anyone.
Date published: 2015-04-20
Rated 4 out of 5 by from Great TV over all. I have watched this TV for small room for 3 month. Excellent Image and fare enough 4k monitor. only cons are the stands. it is too wide spread out to sit on the normal tv stand.
Date published: 2015-04-18
  • 2015-10-09T08:22CST
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We're here to support you with our product.

Contact us for any purchasing inquiries.

Product Support


Ask your questions. Share your answers.

My tv remote isn't working. Usually when I scroll I see a arrow on the screen and I don't see anything. I tried to reset it by holding down the back key and home button. It never blinked 3 times 

Asked by: Jada
We regret the inconvenience you have experienced with this television and its accessories. It is recommended to try replacing the batteries in the controller. If this does not resolve the matter, then the TV may require service. To make service arrangements, you may either contact our Customer Interactive Center at 800-243-0000, or you can check our Repair Provider Lookup on our website, at
Answered by: NeilE
Date published: 2015-09-23

On the cord that runs from the Wii system to the TV has a yellow, red and white cord. On the back of the TV it looks like only a yellow and a green/blue input. Is the Wii compatible with this TV or is there an adapter I need?

Asked by: Kilika
Our offices, in the United States, do not have product information for Canada. In order to obtain such information, it is recommended to check our subsidiary’s website, at You may also contact our Canada offices at 1-888-542-2623.
Answered by: NeilE
Date published: 2015-09-17

Does this display feature HDMI 2.0?

Can someone at LG confirm whether or not this display features HDMI 2.0 input? Thanks!
Asked by: grandpixel
Answered by: ovidius
Date published: 2015-09-06

Netflix 4K

Why don't I see the 4K option when signed into Netflix?
Asked by: nita
We appreciate your interest in this television. Has your Netflix service been upgraded to 4K service yet? The standard account access does not provide 4K viewing. The service must be upgraded in order for the 4K service to be available.
Answered by: NeilE
Date published: 2015-03-27

which wireless dongle works best for this model

Lg 40ub8000
Asked by: Florzell
We appreciate your interest in this television. According to the specifications of this TV, no dongle should be required. This unit already has a IEEE 802.11a/b/g/n, 2.4GHz / 5GHz Wireless LAN module and a 2.4GHz Bluetooth 3.0, 2.4GHz module.
Answered by: NeilE
Date published: 2015-01-14

DLNA Support for LG40UB8000

I have a NAS drive attached to my router. Can my LG40UB8000 play content over Wifi or Ethernet, or do I have to hook up USB?
Asked by: wdmtaj
We appreciate your interest in this television and its features. DLNA Support is available on this product through the Smart Share feature, located in the MY APPS bar of the HOME menu. Hopefully this helps in your search.
Answered by: NeilE
Date published: 2015-01-12


Can it be mounted on wall?
Asked by: Ketch
It has 200x200 VESA mount, so yes.
Answered by: grandpixel
Date published: 2015-01-13

why this tv does not have a headphone plug or bluetooth option for headphones?

Asked by: allg
We appreciate your interest in this television. It was not a part of the design of this particular TV model to be compatible with any headphones.
Answered by: NeilE
Date published: 2015-09-08
  • 2015-10-09T09:23CST
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