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Key Features

  • HD Display
  • HDMI
  • LED Backlighting
See Retailer for Pricing


HDMI (High Definition Multimedia Interface) offers incredible audio/video quality and single-cable convenience. This monitor includes an HDMI input, so you can connect a true high-definition source, such as a high-end computer, Blu-ray player or next-generation videogame console.

LED Backlighting

LED Backlighting

LG’s LED backlighitng delivers exceptional brightness and amazing image clarity. You'll see richer colors and deeper blacks too, and LEDs offer greater energy efficiency compared to conventional LCD monitors.


What People Are Saying

Rated 5 out of 5 by from Overall a great TV, and value for my purposes. I was looking at 24 inch TVs to upgrade from my 19 inch kitchen TV, and I saw this 28 inch TV from LG. I measured the space that I had for it, and realized that it would not be too big for the space I had. I read some of the reviews on the TV, and decided at the price it was being offered at I could not go wrong. It set up easily, and the default settings produced a great picture. I did not find any of the cons about the TV that I read in reviews to be true, and I am thoroughly happy with the purchase. It’s my first LG TV and probably won’t be my last.
Date published: 2018-12-07
Rated 4 out of 5 by from Nice for the price I bought this tv because it is the largest size that will fit in the space that I have. It is slightly larger than the 24” I replaced and one of the only brands that makes the size. I would have given it 5 stars if it didn’t announce extremely loudly that it is turning on or off. If there’s a way to lower the announcement or better yet, turn it off I will be a much happier customer. Otherwise I think the picture and sound are very good.
Date published: 2018-12-03
Rated 4 out of 5 by from We are pleased with the picture and sound. I am most satisfied after my first month of viewing.
Date published: 2018-12-01
Rated 4 out of 5 by from Excellent picture, easy to set up I bought this 2 weeks ago and I am more than satisfied. The TV is easy to set up, audio is quite good and video i excellent. It is just the right size (28") for where we put it - the kitchen/dining room and now we can watch sports or news when we cannot be in the living room. My only criticism is that the voice telling you that it is on and what the picture resolution is becomes somewhat annoying. Perhaps it can be turned off, but I haven't yet discovered how to do so.
Date published: 2018-11-28
Rated 5 out of 5 by from As advertised..... I've had it for about a week, and am very happy with it, fits perfectly in the space it is used. Great picture, sound is OK. Very pleased overall.
Date published: 2018-11-23
Rated 5 out of 5 by from Bright and beautiful I have a 24 " LG and LOVE it so I bought the 28" and LOVE it.
Date published: 2018-11-20
Rated 5 out of 5 by from Great color and clarity. I needed a smaller tv for a bedroom and this one was the perfect size. Very easy to set up!
Date published: 2018-11-18
Rated 5 out of 5 by from Nice television I bought my television about three weeks ago. It is a 28 inch screen. Just the right size for a bedroom. Clear sharp picture. Very pleased with my purchase.
Date published: 2018-11-12
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Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

Does this TV support HDMI-CEC, aka SimpLink

Asked by: Irishbuckeye
The LG HD 720p LED TV - 28" Class (27.5" Diag), Model # 28LJ400B-PU does not support Simplink...^IFV
Answered by: LGJoel
Date published: 2018-12-10

What is the distance (dimension) between the stand legs of the TV?

Asked by: Sallee
There are approximately 19 inches between the legs of the 28LJ400B. If you are in need of any assistance, have additional questions, or would just like to see our helpful tips, check us out on Twitter @LGUSSupport ^CP
Answered by: ChrisPSM
Date published: 2018-10-17

Can anyone recommend a small, low profile sound bar to go with this tv? Love the picture, but the sound needs a boost. Thanks!

Asked by: JPC33
Hello, we do not make "low profile" sound bars but 2 of are small ones would be the SH2 and SJ4Y-S. ^AC
Answered by: Amber C
Date published: 2018-03-19

Can I use wired headphones on this tv ? I have tried to send lug in a set and getno sound through the headset

Asked by: BLeg
Hello, the 28LJ400B-PU does not have a headphone jack. ^AC
Answered by: Amber C
Date published: 2018-03-12

Does the LG 29LJ400B have a RCA video input connector? Sometimes you just need some older technology mixed in with the newer technology. Thanks

Asked by: Just Pondering
The LG HD 720p LED TV - 28" Class (27.5" Diag), Model # 28LJ400B, like most current TVs, has what is referred to as a Shared Composite/Component Video Input. As you are aware, the Composite Inouts is what is commonly referred to as the RCA inouts which are color coded as Red, White and Yellow and the Component are color coded as Red, Green and Blue. The TVs video input circuitry has been modified so that both a composite and component video source connection (and associated analog audio input) can be accommodated. However, you cannot plug in both a composite video and component video signal source (with associated analog stereo audio) to the TV at the same time. On our product page for this TV, you can use the left navigation arrow to scroll to the left of the main image and you can look at a picture of this port. The Red and White RCA barrel tips on an RCA cable are for the Stereo Audio signal and those can be plugged into the ports labeled as L/MONO AUDIO R by matching the colors. The Yellow tip of the RCA cable ( which sends an analog video signal in which both the Color and B/W portions are transferred together) can be plugged into half Yellow/half Green port on the TV labeled as Video/Y...^IFV
Answered by: LGJoel
Date published: 2018-02-22

Is there a screen mirroring feature on this TV? And if so how do I turn it on / use ot

Asked by: 1050
Hello, the 28LJ400B-PU does not have that feature. ^AC
Answered by: Amber C
Date published: 2018-02-15

Does the TV have a digital QAM tuner? The cable TV service provider that I use has some channels that can be seen without the use of a set top box. I can see these channels by connecting the coax cable directly to a QAM capable TV set.

Asked by: zzap
A 64 & 256 QAM tuner is one of three built-in tuners in this LG HD 720p LED TV - 28" Class (27.5" Diag), Model # 28LJ400B. The other two built-in tuners are an ATSC tuner and an NTSC-M tuner...^IFV
Answered by: LGJoel
Date published: 2018-02-15

How to I disable to voice announcement option, ie"channel 9" ?

Asked by: Earthma
In the settings menu for your LG HD 720p LED TV - 28" Class (27.5" Diag), Model # 28LJ400B, navigate to (Settings) > Accessibility > Audio Guidance and set it to off. You can find these instructions on page 12 in your owner's manual under 'To Use Audio Guidance'...^IFV
Answered by: LGJoel
Date published: 2018-01-31
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