Question about Sansui 42" Widescreen 120Hz 1080p LED HDTV

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LED TV back-light bleeding, spreading white cloudy patches on corner edges.

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Check the backlight inverter board, and backlight LED array. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/

Posted on May 13, 2014

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Posted on Jan 02, 2017

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Visio E701I-A3 TV backlight part number


The following picture symptoms indicate a bad LCD panel, and NOT a bad back light or board:
-One side of the picture is darker than the other
-Picture has horizontal line(s)
-A dark, cloudy spot spreads across the picture

Jan 22, 2016 | Televison & Video

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Hi! I have a question about my LG 55LS4500 55" LCD TV. It started out as a dark cloud on the bottom right corner and now it is starting to spread. I was told I may need the LED Panels.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Oct 13, 2015 | LG Televison & Video

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I got some white patches appeared on my led which is very visible in black back ground which is awful my product is sony vaio E series laptop can any one tell me why does those spots appeared


That's called backlight bleed. It's a known issue with certain models of the LED screens. I had a similar issue with my previous laptop, a Lenovo G560. The only solution is to replace the screen.

Nov 18, 2013 | Sony VAIO E Series VPCEB36GX/BJ Notebook

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White spots on sony bravia 32" S series


what is the cause for the televisions screen to get white spots that spread

Aug 05, 2013 | Sony BRAVIA Televison & Video

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My Sony LCD model no CX52 There r white patches and background images are not visible Screen is full of pathes what to do


The LCD television is a flat-panel television which utilizes a Liquid Crystal Display technology. It has two layers of glass which are polarized and stuck together. The liquid crystals are held in one of the layers. These liquid crystals pass, or block the light, to produce images on the screen when the electric current passes through it.

However, the crystals do not produce their own light. The light comes from the series of fluorescent lamps at the back of the screen. There are millions of shutters arranged in a grid, which open and close to release and trap some of the light that is not needed to create images. Then each shutter is paired with a colored filter which produces a sub-pixel. These are so small, that when they combine, they create a single pixel, which appears to be a single spot of color on the screen. With the help of the fluorescent lamps, the images created by the liquid crystals become visible to the viewer.

LCD television produces high image quality. They can be made very thin, which makes them less space-consuming, and the user can hang them anywhere. This makes them appealing to buyers.

LED TV's are actually very much like LCD TV's. They also have a flat-screen which utilizes Liquid Crystal Display technology. The only difference is their source of light, which is at the back of the screen. The LCD TV uses fluorescent lamps, and the LED TV uses LED (Light Emitting Diodes).

There are two types of LED backlighting. One is referred to as Edge lighting, and the other is called Full-Array lighting. With the Edge lighting, the series of diodes are arranged along the outside edges of the screen. When there is power, the light is distributed across the screen. Alternatively, in Full-Array lighting, there are several rows of diodes behind the entire surface of the screen. They provide more control over brightness and dimming, because the diodes can be turned on and off independently.



LED TV's are LCD TV's with a new backlight system. They are newly developed for LCD's, because Light Emitting Diodes are said to give more balance in color saturation, and use less power than the fluorescent lamps. LED TV's are the newest version, and that's why they are currently more expensive than the standard LCD TV's.

Summary:

LED TV's are still LCD TV's. They are just considered to be the newer LCD TV version because of the new backlight system used. The LED TV uses Light Emitting Diodes, while the standard LCD TV uses fluorescent lamps. Although they both still use Liquid Crystal Display technology. The main difference is the part behind their screen, which is the backlight.


Read more: Difference Between LCD and LED Televisions ' Difference Between ' LCD vs LED Televisions http://www.differencebetween.net/object/difference-between-lcd-and-led-televisions/#ixzz2Bb0rIue6

Nov 08, 2012 | Televison & Video

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What is an Samsung UN40D6500 LCD TV? LCD TV Liquid Crystal Display, which stands out from the bulb or CCFL Cold Cathode Fluorescent Lamp, which is a thin tube like a drinking straw. By horizontal long as...


Hello
What is this? Are you trying to take a class to everyone to thie world, how the LCD TV works? I think you be a student, not a professional. If you wer a professional, you may won't dare to post this as a problem. OK.

Feb 11, 2012 | Computers & Internet

1 Answer

2004 Sony KDF-55WF655 LED TV. Blue dots grouped and sparce all over the screen. Some dots appear to be twinkling. Lower corner has bright cloudy display. Dots and cloudy corner display will change state...


Bad Light Engine Call Encompass Parts Distrubtion
1-800-638-3328 or Visit their website they will list Parts in stock for this Model. UED has light engines
1-800-648-6657 you can also Look them up on Ebay sometimes you can find Parts alot cheaper their.Part number#A-1084-662-A Pice $1,423.64 core fee $800.00 Part Cost $623.64

Mar 25, 2010 | Televison & Video

1 Answer

I own a 46 inch sony Bravia and have noticed white spots on the corner edges when a black screen is up. Ithought it might have been the surround speakers too close as in the older stlye tv being affected...


All LCD TVs (except the newer LED versions) are back lite on the edges of the TV. Depending on how faint the image is you may simply be noticing the lights. Try adjusting the backlight or brightness.
Without an image this is the best I can do.

Nov 24, 2009 | Panasonic PT-50LC13 50" Rear Projection...

1 Answer

Cloudy patches from backlight leakage in LCD TV


You have to send it back to company to fix this problem>

Dec 04, 2007 | Televison & Video

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