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Samsung LN40A550 40-Inch 1080p LCD HDTV (2008 Model)

4.4 out of 5 stars 574 customer reviews
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  • Wide Color Gamut-CCFL LCD backlight
  • USB 2.0, HDMI-CDC
  • Wide Color Enhancer
  • Full HD 1080p Resolution
  • 3 HDMI Inputs
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  • Free 60-Day Tech Support: This item is eligible for FREE Tech Support for 60 days from the date of delivery. Over the phone, our trained technicians can help you set up, configure, connect, and troubleshoot so you can start enjoying your new purchase. Owners of qualifying products can reach Tech Support by selecting your product on the Contact Us page. Learn more

Technical Details

  • Brand Name: Samsung
  • Model Number: LN-40A550
  • Display Technology: LCD
  • Display Size: 40 inches
  • Image Aspect Ratio: 16:9
See more technical details

Product Description

Product Description

The SAMSUNG LN40A550 has an incredible 30,000:1 contrast ratio that delivers the sharpest, most realistic picture quality you’ve ever seen. Want to get more entertainment out of your TV than movies and shows? With our Wiselink® USB connection, you can easily and quickly hook up your MP3 player or digital camera and entertain family and friends with a photo slideshow set to music. SAMSUNG LCD flat screen TVs make your high-definition dreams a reality.

Samsung's 550 Series is a perfect  way to step up to Full HD 1080presolution. A fast 5 ms response rate produces smooth-motion scenes for sports and action movies, and a dynamic contrast ratio of 30,000:1 makes for deep blacks and crisp lines (15,000:1 in 32-inch and 37-inch models).  Superb connectivity and networking  with a USB port and 3 HDMI 1.3 ports with Consumer Electronics Control (CEC) means these HDTVs play well with all of your other electronics. With our Wiselink® USB connection, you can easily and quickly hook up your MP3 player or digital camera and entertain family and friends with a photo slideshow set to music.

lifestyleKey Features

  • New -- 30,000:1 dynamic contrast ratio: up from 15,000:1 on 2007 models (15,000 on 32-inch and 37-inch models) (Learn more)
  • New -- Fast 5ms response time: down from 8ms on 2007 models thanks to a new high-speed liquid crystal
  • Full 1080p HD (Learn more)
  • 178-degree viewing angle from all four axes with Super Patterned Vertical Alignment (Learn more)
  • 3 HDMI 1.3 ports: Simplay compliant (Learn more)
  • USB 2.0 port: connect devices directly to your your MP3 player or digital camera and entertain family and friends with a photo slideshow set to music.
  • DNIe Digital Natural Image Engine improves the picture by enhancing the contrast, detail, and white balance (Learn more)
  • Hidden speakers with SRS TruSurround XT audio (Learn more)
  • Wide Color Enhancer technology and Cold Cathode Fluorescent Lamp (CCFL) offer a wider color range (Learn more)
  • Picture-in-Picture (PIP) enables convenient simultaneous viewing of TV programs and video or PC sources
  • V-Chip system allows blocking of rated TV and movie programs determined by the parent to contain objectionable content.
  • Trilingual on-screen displays in English, Spanish or French.
  • Variable sleep timer to turn the TV off in varying time intervals.
  • Auto wall mount compatible: 3-dimensional operation via TV’s remote control; no external IR receiver required.
  • Swivel stand included
  • 1 year parts and 1 year labor warranty (90 days parts and labor for commercial use), with in-home service, backed by Samsung toll-free support

Step Up Features

  • Series 6: 50,000:1 dynamic contrast ratio, AutoMotion Plus 120Hz image interpolation for smoother motion, 4ms response time, Transparent and Opaque Color (TOC) bezel, Clear Panel, Ethernet port with Infolink free RSS feeds, 4 HDMI 1.3 ports, Sports and Game modes, Compatible with Samsung's Home Digital Media Adapter for playback and navigation of Internet and stored PC multimedia
  • Series 7: Internal flash memory (1GB) with pre-loaded interactive content such as cooking recipes, children's entertainment, HD artwork and more, Integrated woofer for an enhanced audio experience, DLNA-Compatible: for better interoperability with electronics, computers and mobile devices from many different manufacturers
  • Series 8: super-slim 1.9-inch thick profile
What size TV should you get?

Learn More

Full HD 1080P

full HD 1080P Full HD, or 1080p, contains 1.5 times more scanning lines than conventional HD TVs. More scanning lines mean more pixels, more details and a better picture. The new Samsung LCD TV with resolution that is approximately 2 times greater than conventional HDTVs, creating the most perfect picture imaginable.

Samsung’s 1080p panel uses a new high-speed liquid crystal to cut response time to 4ms. The fast response time, coupled with Samsung’s Auto Motion Plus 120Hz motion blur reduction technology dramatically reduces motion blur and judder.

30,000:1 Dynamic Contrast Ratio/500 nit Brightness

25,000:1 dynamic contrast ratio 30,000:1 Dynamic Contrast Ratio will give you a picture better than you ever thought possible, with whiter whites, blacker blacks and a nearly infinite subtlety of gradations in between. As two of the most important determining factors in overall picture quality, contrast and brightness levels achieve new heights in this latest generation LCD panel. Samsung’s new LCD TV’s give the most stunning realistic picture quality ever.

Digital Natural Image Engine

DNIe image DNIe The Samsung Digital Natural Image engine. This exclusive Samsung technology dramatically improves the picture by enhancing the contrast, detail, white balance and reduces.
dnie chart

Wide Color Enhancer/Cold Cathode Fluorescent Lamp

The NTSC (National Television Systems Committee) has established the color standards all TVs in America try to meet. And typical LCD TVs only meet about 72% of this standard. Samsung LCD HDTVs use Cold Cathode Fluorescent Lamp back lights to give you 92% coverage of the NTSC standard, ensuring truer, more breathlessly vivid colors.

Samsung’s exclusive Wide Color Enhancer technology delivers more brilliant colors, even in bright areas of the picture where blues and greens are washed out on conventional screens. The system displays wider color reproduction, showing you truer colors – the fresh green of spring foliage, the intense blue of the summer sky.
wide color enhancer wide color enhancer wide color enhancer wide color enhancer


To make the Series 6 a true entertainment hub for any home, Samsung has incorporated advanced HD connectivity and networking capabilities that expand the HDTV’s functionality. A wide variety of multimedia devices can be connected to the set through any one of the four Simplay compliant HDMI 1.3 inputs (including one on the side), and the handy HDMI-CEC feature lets you control all your CEC-enabled peripherals using just one remote.

Connect HD digital devices like disc players, game consoles, and satellite dish components into the 2 rear connections and use the side-mounted input for cameras, camcorders, and laptops. HDMI is the best performing interface for displaying an HD source on an HDTV.

Once connected, users can easily access device menus and manage and display content through the newly redesigned Wheel Key Remote control and the HDTV’s sophisticated content management interface.

All Connections
  • 3 HDMI (High-Definition Multimedia Interface) version 1.3: (2 rear/1 side)
  • Component video: 2 rear (Y, Pb, Pr)
  • Composite inputs: 1 rear (shared with component) / 1 side
  • S-Video: 1 side
  • PC input: 1 rear
  • Wiselink (USB 2.0)
  • RF antenna inputs
  • Headphone jack: side

Super Patterned Vertical Alignment

wide angle
Samsung’s Super Patterned Vertical Alignment (SPVA) panel provides a 178-degree viewing angle from all four axes

Audio Features

TruSurround is a patented SRS technology that solves the problem of playing 5.1 multichannel content over two speakers. TruSurround delivers a compelling, virtual surround sound experience through any two-speaker playback system, including internal television speakers and headphones. It is fully compatible with all multichannel formats up to 5.1 channels. High-quality virtual surround sound can be experienced with just the two hidden, downward-firing side-mounted 2.2-channel dome speakers built into the TV.

SRS TruSurround XT technology delivers an amazing, simulated 3D effect with clear dialog and powerful bass.

TruSurround XT audio also adds three audio enhancement technologies to produce an amazingly immersive sound experience.
  • Dialog Clarity brings movie dialog into Focus during the playback of any surround-encoded material to make speech much clearer and crisper.
  • TruBass creates incredible deep rich bass allowing a person to perceive significantly deeper, richer low bass tones that are far beyond the physical low frequency capabilities of the speaker itself.
  • The SRS WOW feature widens the sound stage by processing standard two-channel stereo material as well as multi-channel encoded material for a dramatic improvement in the playback of any stereo audio over a two-speaker system.
Stereo broadcast reception is offered for MTS and SAP with 181-channel capacity. A sound leveler keeps audio volume consistent during channel changing.

Which Size HDTV is Right for My Room?

HDTV Size chart
With standard-definition TVs, the rule used to be that viewers would feel comfortable watching a set from a distance of 3 to 6 times the screen size in inches. With HDTV, the resolution is so much better that you can sit closer to a larger TV without noticing the pixels. So with HDTVs, the rule tends to be you can sit anywhere from 1.5 to 3 times the screen size (in inches) for the best experience.
If you know the size of the room you have already, where you want to sit, and where your new HDTV should go once you get it, you can figure out the size HDTV you should get.
  • Minimum size = Viewing distance/3
  • Maximum size=Viewing distance/1.5

Product Information

Technical Details

Brand Name Samsung
Item Weight 52.6 pounds
Product Dimensions 39.2 x 3.6 x 24.7 inches
Item model number LN-40A550
Color Name Black

Additional Information

ASIN B001418W2C
Customer Reviews
4.4 out of 5 stars 574 customer reviews

4.4 out of 5 stars
Best Sellers Rank #122,860 in Home Theater (See top 100)
#1,499 in Electronics > Televisions & Video > Televisions > LED & LCD TVs
Shipping Weight 52.6 pounds
Domestic Shipping This item can only be shipped to the 48 contiguous states. We regret it cannot be shipped to APO/FPO, Hawaii, Alaska, or Puerto Rico.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available November 11, 2006

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
This television is truly something to be admired. I'd say it's also a work of art.

I have a high definition cable box with an HDMI cable to the TV and the HD channels are superb. I mean, the picture is totally 100% crystal clear. I have windows behind me and somehow there is virtually no glare. Yes, the TV looks better when it is dark outside versus light outside but it's perfectly great when it is light outside.

I'm writing this review on my couch. My laptop is connected to the TV via a VGA cable with a wireless keyboard and mouse. Unfortunately my laptop does not have HDMI but I can see very well with the VGA cable. Needless to say, I am going to become much more lazy as a result of this TV.

The 40 inches is great for my viewing pleasure. I'm sure 46 is bigger but I am 100% content with 40 inches. It comes down to price. I did not want to pay more than $1,200 for a TV (that's $100 a month for 12 months using the Amazon Store Card). So this was a no-brainer for me.

If you are in the market for a TV, I highly suggest this one. It is truly a wonderful TV.

The "only" thing that isn't 100% perfect is the sound. The sound is good mind you, but it is not as perfect as the picture. But for the record, I have not played with the equalizer which people report helps the sound.

This is an amazing TV.

UPDATE 6/12/2008: This is still a remarkable television. I don't have any complaints about it at all. Even the sound is perfectly fine. However, you MUST either have a Blu Ray player or an Upconvert player with an HDMI cable to get the full benefit. Everything looks and sounds perfect on this TV.

UPDATE 7/13/2008: The TV is still perfect so just buy it already!
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11 Comments 197 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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One of my biggest purchases with Amazon and it went as smooth as possible. The picture on this TV is amazing. FiOS HD can be almost too much pretty on one screen with this TV, it's a bit overwhelming at first. Standard def channels are of course a less clear but better than expected. The only issue I have with this TV is the length of time to power on and off. You also have to point the remote just right sometimes or the function won't register. Small issue though, hardly worth docking points off this unit.

The menu is wonderful and gives complete control over settings. Each input saves your settings too! The AVS Forums have a great thread concerning settings for each input that should be checked out and tested. A little tweaking got the black levels and skin tone just right.

I haven't tested the VGA input, but my Macbook Pro connected with a DVI-HDMI cable is amazing! My FiOS is connected via HDMI and as I mentioned, quite beautiful. I also have a Wii hooked up via component. The Wii maxes out at 480p but really shines on this TV despite the 1080p native res. Don't be fooled though, the picture is a little fuzzy but through some tweaking you can get a great picture without springing for a separate upconverter.

Shipping was of course through Eagle/CEVA. Make sure to call and verify they've got your info. They didn't have my phone number on record at first so I corrected that. My delivery man was Rick. He was great! He called to setup the appointment, was on time, very delicate with the unit, and very personable. I couldn't be more pleased.

UPDATE: Just wanted to mention the finish of the screen. Originally, I was debating between this model and the older lnt4069fx due to the matte screen. I chose this model for several reasons.
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3 Comments 75 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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I purchased the Samsung LN40A550 40" 1080p LCD HDTV on July 14, 2008. It's my 4th big screen HDTV purchase but my first 1080p box. Agree with other reviews in that it has an absolute beautiful picture at a very good price. There are many features I love about this TV, but here's the problem....

I purchased a Samsung 1080P8 upconverting DVD player with an HDMI (version 1.3) cable. When i watch a DVD, i get a 'searching for signal' message that appears on the screen for about 5 seconds. This happens once every minute or two! I went into full troubleshooting mode by replacing the cable, the DVD player, and everything else i could think of. I tried the DVD player and HDMI cable with my other HDTV sets and it worked great. After calling Samsung technical support and getting to their level 2 support in New Jersey, they acknowledged there is a problem with the HDMI connection with the TV but they do not have a firmware fix for it yet. They suggested i wait for the firmware fix (release date unknown), or return the TV and try another one. I opted to exchange the TV for the same model. I received it today and (unfortunately) it has the same problem. I will now return the TV to Amazon, get a refund, and purchase a different model.

Bottom line, if you don't use or need the HDMI connection, you should be fine with this set. However, if you plan to use HDMI I'd look to a different model until this is fixed.

Update on July 28 - After further troubleshooting, the HDMI problem is with the combination of using a Samsung LN40A550 40" 1080p LCD HDTV with the Samsung 1080P8 upconverting DVD player. Together, they do not work. Separately, the upconverting DVD player works perfectly with other TVs, and the Samsung LN40A550 works fine with another upconverting DVD.
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