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Back lighting for led/lcd t/v.

Behide the t/v screens there are lighting tubes. called back linghting.and i need a supplyer. thank you steve.

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Posted on Jul 25, 2013

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How much does picture tube for 42 inch flat screen Sanyo TV cost

There is no picture tube in a modern flat screen TV.
And unless it's physically broken, it's usually something else that has failed and not the screen.
A picture tube is a CRT (cathode ray tube) that sends electrons from the back to the front to light up different color phosphorous dots.
A modern flat screen TV on the other hand is LCD (liquid crystal display) that turns on and off to allow backlighting through multi colored filters. (LED TV also uses a LCD screen, the only difference is the backlighting is LED and not fluorescent lamps.)

Nov 26, 2016 | Sanyo Televison & Video

2 Answers

Samsung UN55EH6000 has audio, but no backlight LED as seen with flashlight test.

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.
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. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Feb 29, 2016 | Samsung Electronics UN55EH6000 - 55in...

1 Answer

LG LED tv no picture but do have sounds,

the LCD screen has a light source (like a monitor). It can be an lamp (like a projector TV), a mercury tube (like a monitor) or a LED-based lamp (so-called LED TVs have that, not to be mistaken for OLED TVs, where each pixel is a LED). I don't believe this model is an OLED. It could be one of the others, most likely a mercury lamp that lays at one side of the monitor and illuminates the screen.
You could shile a flashlight to the screen (from close distance) while the TV is powered on and see if any image is being formed on the LCD. If it does, the lamp is burned out and needs replacing. If no ghostly image is seen, then it could be the video processor and then it's a bigger problem.

Apr 09, 2014 | LG 42LC3R 42 in. LCD TV

1 Answer

Replace led backlight inverter on sony vauioi notebook

The invertor is used to light flourexcent tubes that is the back light on a TFT/LCD screen. LED screens do not have an inverter for that purpose.

Feb 24, 2014 | Compaq Presario Notebook

1 Answer

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.


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

Nov 08, 2012 | Televison & Video

1 Answer

I need a replacement screen and i'm not sure which cffl/backlight to order

Here are the eBay search results for your exact system model -

Sep 20, 2012 | Toshiba Satellite L355D-S7809 NoteBook AMD...

1 Answer

When i turn on my monitor i waitting about 10minutes to see the panel on. why? thanks

The most likely problem would be starting the cold-cathode backlight tubes- which are basically flourescent bulbs.... if the monitor is very old, this is to be of the drawbacks of this type of backlighting. Your picture is actually there, you just cannot see it until the lights start.

You can get the tubes replaced by a good repair shop, but IMHO it is not worth the expense... you would be better off with a new monitor. The new "LED" monitors use bright white LED's for backlighting (do not let the hype fool you- they are still LCD monitors, they just use LED's for lighting the screen!) and last thousands of hours longer than the cold-cathode light tubes.

Jan 29, 2011 | NEC MultiSync LCD1535VI (Black) 15" LCD...

1 Answer

Power led flashing on dell E172FPB monitor

The fact this is a LCd or at least listed as a LCD there are a few porbable causes to a faulure,

1. Bent pins
2. Bad signal cable
3. Bad back light (take a flash light point it at the screen if you see the screen change the backlight)

4. Bad signal board (rare)

please do be considerate and check these things in the list please to leace postive feedback and ratings for any expert that tried to help you.

May 26, 2010 | BenQ FP731 17" LCD Monitor

1 Answer

My screen will not light up on my acer. i changed

You can see the hint of a picture on the screen? This could mean that the new inverter that you bought is malfunctioning or possibly it's not the right one for your computer, it could also be that you will have to replace your LCD because the "back-lights" are burned out. The back-lights are very small fluorescent tubes or LEDs. either way they are not easy to repair. You would be better off buying a new LCD that goes to your laptop off of eBay. I'm pretty sure that your problem is that your LCD's back-lights are not working and you'll need to replace the LCD.

Mar 26, 2010 | Computers & Internet

2 Answers

Fushia Pink color on screen

It depends how many times the LED blinks. Tell me how many and I can read the description on the manual.

Jan 06, 2007 | Sony FD Trinitron WEGA KV-30HS420 30" TV

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