Panasonic TX40JX850B is rated 4.7 out of 5 by 62.
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Panasonic TX40JX850B

40 inch 4K Ultra HD HDR Smart LED TV Freeview Play

Unfortunately this product is no longer available.

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Disabled assistance

All products that are available to purchase on the Richer Sounds website can be delivered free to blind, partially sighted or those with a disability. Find out more

Please contact web after sales for more info.
For delivery of in-store only deals, please contact your local store for more details.
Ts&Cs apply - see our delivery page.
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Adapting to whatever you watch, the Panasonic TX-40JX850B maximises your viewing pleasure.

New HCX AI Processor
At the heart of this Panasonic 40 inch TV is an intelligent new processor. Delivering accurate colour, contrast and pin-sharp clarity, the processor works with the panel to produce the best picture – whatever the genre. The AI (Artificial Intelligence) processor detects the content and adjusts the setting to suit. Watch sports, for example and the TV recognises this and selects the best settings for fast-moving action.

HDR Bright Panel Plus for super-sharp images
Once the signal has been analysed by the powerful HCX AI processor, it’s sent to a screen that does it justice – HDR Bright Panel Plus. Using extra-bright LED backlights, this screen goes brighter and therefore enhances contrast, giving superb levels of contrast – even in conditions of high ambient light.

Local Dimming Pro – enhanced contrast
Working in conjunction with the HDR Bright Panel Plus, Local Dimming Pro gives more control over the picture contrast. By being able to dim particular areas of the image, contrast is enhanced, making images look even more natural and lifelike. The processing is so fast and seamless, you’ll notice nothing except an incredible sense of image realism.

Dolby Atmos and Cinema Surround for immersive sound
Compatible with Dolby Atmos sound, this Panasonic TV creates a more immersive, enveloping sound. Fitted with a 20 watt amp, the 40JX850B produces room-filling sound. For even more immersion, select the Cinema Surround setting, or use the HDMI eARC or optical digital output to add a soundbar or base.

HDR10+ Adaptive – ultimate detail in all lighting conditions
HDR10+ Adaptive takes HDR10 and to the next level, making it the ultimate HDR-type picture processor. HDR10+ Adaptive uses light sensors inside the TV to adjust the picture quality for the best contrast. This improves the picture’s brightness, without ‘washing out’ the depth. You get a consistent picture quality, however light or dark your room is.

Multi-format HDR support for a stunning picture from all sources
As well as HDR10+ Adaptive, the TX-40JX850B also offers multi-format HDR, including HDR10+, HDR10, HLG and HLG Photo. HDR10+ offers scene-by-scene HDR mastering for the truest, most accurate HDR picture technology. Each scene is optimised, meaning the maximum amount of detail is shown – even in the brightest or darkest moments.

See the picture exactly as originally intended, with Filmmaker Mode
Featuring exclusive technology from Panasonic, Filmmaker Mode makes the best of any movie. Designed in collaboration with filmmakers and Hollywood studios, Filmmaker Mode lets you experience the cinematic vision, exactly as the director intended. Overriding the TV’s own motion and picture processing, Filmmaker Mode presents the correct aspect ratio, colour and frame rate – just as the filmmakers intended. Panasonic exclusively add Intelligent Sensing to Filmmaker mode, so that the picture reacts intelligently to changes in light, automatically giving you the most cinematic picture possible, whether the room is bright or dark.

Smart TV made easy with HomeScreen 6.0
The latest version of Panasonic’s HomeScreen makes all the smart functions even easier to access. When selecting content from your favourite streaming apps, the system offers thumbnail images, making it easier to find your favourite programme. Support for Google Assistant and Alexa means you can also find content via voice command. The new My Scenery feature offers a selection of background images and videos.

Search, stream and play
When it comes to Smart TV flexibility, the TX40JX850B has all the features you need. As well as the popular streaming apps, the TV also offers a full web browser. DLNA certified streaming makes it easy to transfer music and video files from your home computer, laptop or NAS drive to the TV. Also standard is Swipe and Share functionality. Swipe and share lets you use the Panasonic Remote TV app for smartphone media sharing. By using the app on your smartphone or tablet, you can easily stream pictures, 4K videos and music straight to the TV - no cables required.

Listen with two pairs of headphones, with Dual Bluetooth Connection
New for 2021, Dual Bluetooth Connection lets two of you listen, simultaneously, with wireless Bluetooth headphones. Perfect for immersive listening when the kids have gone to bed, Dual Bluetooth Connection helps keep the action intense, without disturbing others.

For a compact TV with full-size tech, check out the Panasonic TX-40JX850B.

Please note, this Smart TV features third party Apps. These Apps may be modified or withdrawn at any time. There may also be a delay in launching some of the featured Apps. Catch-up TV Apps may vary by region. The function and availability of apps is not covered by the manufacturer’s or Richer Sounds’ guarantee.
Screen Size
Screen Technology
Picture Quality
LED Backlight
LED - Edge
Local Dimming
Motion Processing
BMR 1600
Pixel Resolution
3840 x 2160
HDR Formats
Dolby Vision, HDR10, HDR10+, HLG
Panel Bit Depth
10 bit (8 + 2 FRC)
Panel Bit Depth
10 (8+2)
Panel Frequency
Panel Frequency
Screen Resolution
4K Ultra HD
Smart Features
BBC iPlayer
Full Web Browser
Netflix 4K Streaming
Smartphone control
TV Catch Up
Freeview Play
Voice Activated TV
ARC - Audio Return Channel
Yes - eARC
Digital Audio Output
Yes - Optical
3 (HDCP 2.2 - 2)
HDMI 2.0
Headphone Socket
Analogue Tuner
TV Tuner
USB Recording
USB Video Playback
Energy Consumption
Energy Efficiency Rating
Power Consumption - Standby
Energy - kWh/1000h
Energy - HDR rating
Energy - HDR kWh/1000h
Energy - Label Rating
Dimensions excluding stand WxHxD
901 x 517 x 63
Dimensions including stand WxHxD
901 x 574 x 236
Maximum Stand Width (mm)
Outer Box Dimensions WxHxD
1010 x 661 x 149
Wall Mount Required
VESA - 200 x 200
Weight (KG)
11/13 (Without/With Stand)
Remote Control
Yes - Fixed
Rated 5 out of 5 by from Jaw dropping service Bought to replace a tv that had stopped working. The Milton Keynes staff were extremely helpful and the whole process was seamless down to delivery which was considered and timely. Faultless.
Date published: 2021-12-02
Rated 5 out of 5 by from Great features A huge improvement on our previous Panasonic. Many programmes are excellent quality and clarity, and the optical audio output is much appreciated
Date published: 2021-12-02
Rated 5 out of 5 by from Lovely tv with clear picture and great sound. I bought this tv in November as an early birthday present - for myself! It’s a huge improvement on the old one. Good picture clarity and choice of viewing.
Date published: 2021-12-02
Rated 5 out of 5 by from A Very Good 40" Television I bought this set a couple of weeks ago via my local branch. I wanted a decent TV not exceeding 43" screen. I like Panasonic products, I use their DVD Recorders, Radios, TV's and even an old VCR. I wanted a dedicated Freeserve TV of modern specification. This 40" TV was recommended by the shop staff and I LIKE IT! The smaller 40" set made it fit better into it's location. Samsung 43" was the second choice, but I preferred the picture quality on the Panasonic. I am extremely pleased with my Panasonic 40" TV. I feel that I have made the correct choice for my needs. Thank You to the Bournemouth Branch for their help and advice.
Date published: 2021-11-26
Rated 5 out of 5 by from A very good decision We needed a TV for a small space, so either 40" or, at a pinch 43". Not much choice at 40" ,but the Panasonic got very good reviews except for some doubt about viewing angles. Paul at Richer Sounds Hull explained the potential problems in enough detail to work out that we would have no problem so we bought. And a very good decision that was. Great picture, adequate sound (better with our sound bar) and very easy to set up. All the connections we could possibly need and then some.
Date published: 2021-11-26
Rated 5 out of 5 by from Panasonic Smart TV We bought this 3 weeks ago and delighted with it. Neat and easy to install.
Date published: 2021-11-25
Rated 5 out of 5 by from Excellent set with every feature that we want Excellent company to deal with. Prices as good as or better than other suppliers that we considered
Date published: 2021-11-24
Rated 5 out of 5 by from Smart TV I decided to replace my tv for one with Freeview Play and other apps. I purchased this Panasonic TV from Richer Sounds as the price was right and it came with a 6 year warranty. The TV was easy to set up, colour and sound is very good.
Date published: 2021-11-23
Date published: 2021-10-31
Rated 3 out of 5 by from Picture fades considerably when not viewed face on I’ve had my TV for 3 or 4 weeks and have resisted posting a review until I’ve had a chance to experience it properly and I have a mixed review unfortunately. The TV picture is marvellous face on, but I sat slightly at an angle on a different seat in our living room and couldn’t believe the drop in quality in the colours. When I say I sat at an angle to the TV, it is a slight angle, I’m certainly not looking at the TV edge on!! Just by moving my head to the right while sat in the same position, the colour vividly improves. At a slight angle the colour becomes really insipid. It’s like the difference between a milky and a strong cup of tea. I never experienced this with my previous 8 year old Samsung. I only moved away from Samsung as a protest as I do think their software support has been dire! I can honestly say I’m disappointed with this. Face on the picture is great. I like a documentary and often when a program shows old clips in black and white, the clarity is so good it’s as if the clip had just been made. I watched an old Bond movie from the 70’s and the picture quality was almost too good as it looked too real if that makes sense, so face on its magnificent, but not half as good elsewhere in the room. If your hanging this on the wall in a bedroom I would say it’s perfect, as you would always watch face on, but not perfect for our lounge.
Date published: 2021-10-30
Rated 5 out of 5 by from A great technological step forward A recent purchase, very easy to set up. Excellent picture and sound for slim TV. Size just right for my room without being over bearing. Well pleased!
Date published: 2021-10-28
Rated 5 out of 5 by from Best TV I have ever bought I bought this a month ago and am blown away by the superb picture quality, sound and also the excellent apps. I previously had a state of the art plasma but this is way better so am absolutely delighted.
Date published: 2021-10-22
Rated 4 out of 5 by from Fantastic picture okay sound Very happy with the TV. Picture is excellent, sound is reasonable considering its built in.
Date published: 2021-09-26
Rated 5 out of 5 by from Diligent service, excellent products. I bought a Panasonic 40” and LG 32” TV from Richer sounds for my new kitchen and garden room. Richer sounds were very helpful in choosing the right wall brackets and also a sound bar. The price was very reasonable and it all sounds great! I’m very pleased and would recommend them to anyone.
Date published: 2021-09-12
Rated 5 out of 5 by from Great picture and easy to use. Gregory gave me advice on 29/9202, regarding correct product and ensured I had the correct installers, who installed the tv, as promised. I was unable to register and guarantee the tv, so visited the Bournemouth branch on 10/09/21. Lewis was very helpfull and registered the tv, on my behalf, in store while I was there. Both Gregory and Lewis have been VERY helpfull, and should I need any further advice, I’m sure the help would be forthcoming. Again, many thanks. Jill Benham.
Date published: 2021-09-11
Rated 5 out of 5 by from A product as good as the company that sold it! We expect high end TV sets to be good but often the retailers let the side down. That’s never the case with Richer Sounds. Good professional advice, excellent back up and ready to help.
Date published: 2021-09-10
Rated 4 out of 5 by from Excellent picture with a few minor issues Excellent picture with many options to tweak according to your viewing situation. Picture is best viewed immediately in front of the screen so make sure the set is at eye level, there is a surprising drop off in picture quality (it looks washed out) if you are too far above or below or to the side of the screen. It handles standard definition well, it brings a deeper level of blacks than you might expect for low quality footage. High definition pictures look excellent with great sharpness, depth and clarity. UHD footage is excellent also (my first experience of 4K, not the big step up that SD is to HD but UHD is noticeably better). Speakers are average at best, to be expected I guess, but Panasonic should be ashamed that they won't put more effort in to making better quality speakers. The sound is a little hollow and bassy but with a few adjustments can be improved slightly. Although not listed in any of the marketing material there is an Eco Viewing option which reduces the brightness with a simple access to the option as well as manuel Backlight options as well, although I was disappointed that on the lowest settings it is still not as dark as my previous TV but still alot darker than the standard setting so good for night viewing. Apps work great as well. Recommended for sure, just a shame that a few small issues let it down slightly but ultimately won't lead to any big issues or a regretted decision to buy.
Date published: 2021-08-21
Rated 5 out of 5 by from Exceptional at this size Bought this for a smaller room and the space allocated meant that only a 40 inch TV would do. That immediately restricted me to Panasonic of the major manufacturers. I'm impressed with what they've done including the 4K and Dolby Atmos. Sleek and easy to set up. Panasonic's app range is not as impressive as some others, I will note. However, this is not an issue for me as it's hooked up to Sky Q. All in all, for the size, I'm very pleased.
Date published: 2021-08-20
Rated 4 out of 5 by from Big improvement on replaced model Early days but beginning to master confusing controls
Date published: 2021-08-15
Rated 4 out of 5 by from Good product and knowledgeable helpful staff Arranged to buy and paid for a Samsung TV but then a couple of days later, at the last minute, I had to change the TV to a Panasonic. This presented no problem to the staff at Lichfield Richer Sounds who immediately ordered the new TV for me and which I took delivery of a few days later. They also recommended an excellent local installer so I am now impressed with not just a great TV but also the overall service provided.
Date published: 2021-08-13
Rated 3 out of 5 by from Support local retailer Bought two of the same branded Smart TV’s in August along with a sound bar I am delighted with TV’s but sound bar is underwhelming
Date published: 2021-08-09
Rated 5 out of 5 by from Well worth the money Great service. And first class delivery. Would recommend you every time
Date published: 2021-07-16
Rated 5 out of 5 by from Super TV TV was purchased to link with a Panasonic sound box and 4K satellite reciver Very pleased with the high quality of picture as well as the additional apps etc.
Date published: 2021-07-09
Rated 5 out of 5 by from Excellent picture and really good quality sound. I bought threally pleased with is a couple of weeks ago and am really pleased with the purchase. The picture is amazing and to see such fine picture detail is incredible. So pleased I bought this particular Panasonic TV.
Date published: 2021-07-05
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