Question about Toshiba 40XF550U 40 in. LCD TV

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Toshiba 40xf550u 40" LCD TV,

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4 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

phil_frye
  • 295 Answers

SOURCE: My backlight inverter is fried, how do I fix it?

TV under warranty or not?

Cost more for the labor 90 to 120 than the part which is possibly between 50 to 100

Posted on Nov 19, 2009

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SOURCE: 47inch toshiba lcd tv (HL167) black picture, but

Best to replace both at the same time . Yes they are easy if you can find the parts.

Posted on Dec 15, 2009

ratonxi
  • 112 Answers

SOURCE: the backlight inverter board .what can aproblem

Hi there,
An inverter board is an electronic circuit which boosts a low voltage DC current in to high voltage. It's used to power a CCFL tube in he television, which enables the backlight. The inverter, is composed of a MOSFET transistor, acting as a switch, an a coil, which boosts the voltage. The common high voltage output of the inverter board is around 800V.
If your inverter board has gone bad, you could replace the transistor and the coil in the board. This method is the cheapest option, but involves a lot of soldering and time. I encourage you to replace the whole inverter circuit, which is far easier, and not so much expensive.
You will have to take apart the television. Unplug the TV from the power outlet-wait around 8 hours to give time to the capacitor to discharge. Unscrew all the bolts of the back panel, and then, with a plastic tool-like a credit card- pull the back of the screen. After that, you will be able to see the circuit board of the TV. Localize the inverter board, it should be identical to this:
http://thumbs1.ebaystatic.com/m/mYnvyfIEorz5TT9qxKTuKzw/140.jpg
Then unplug the BUS cable and every CCFL tube connectors carefully-they are easily identified with a pink and a white cable. Afterwards, unscrew the fixing bolts of the board, and change it for the new one. You can buy a new one from ebay:
http://shop.ebay.com/?_from=R40&_trksid=p5197.m570.l1313&_nkw=32AV502R+inverter&_sacat=See-All-Categories
All you have to do now, is to reverse your steps. Connect each CCFL tube, put the back of the television on, screw the bolts and you are done.

Posted on Feb 25, 2011

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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 -

http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1313&_nkw=Toshiba+Satellite+L355D-S7809+screen&_sacat=0

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Check for any loose soder points or loose connections with wiring sockets to backlight inverter board.

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The tv still new only 1 week old?Yes,return it where u bought it and get a new tv replacement.No?This tv have a 2 long boards that call the LCD inverter boards each sides left and right sides of the tv.Could be etheir one of these two of this long LCD inverter boards it is dead.Must have electronic equipments to test to know exactly with one it is dead.These 2 long LCD inverter boards only job are to probvided a backlight to the tv LCD screen panel to get a pictures.Both of these long LCD inverter boards are not that exspensive and very easily to take the apart and replaced.Tries websites like Shopjimmy.com,Ebay.com to buy both long refurbishes LCD inverter boards for the replacement.

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Tv only a week old take it back were u bought it,trade it in for another tv.Tv have a picture than flashes only a few sec. than died have sound left only?Yes,than those tv 2 long LCD inverter boards are dead.These tv 2 long LCD inverter boards are only to help the tv to have a backlight for tv LCD screen panel only to produced pictures.

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This does not seem to be a power supply issue but rather an issue with the backlight inverter board. When the screen goes black, take a flash light and focus it on the screen from a close distance and several angles. See if you notice a very faint image. Try changing the channels to make it more noticeable. Try it and let me know

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2 Answers

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Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.

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1 Answer

I turn my television on and about not even a minute or so the screen turns black but you can still here the voices so just want to know what is going on.


The tv picture only flashes few mins. than dies,have sound left only wright?Yes,than the tv the 2 long boards that call the LCD inverter boards are dead.These 2 long LCD inverter boards help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those refurbishes 2 long LCD inverter boards for the replacement.

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1 Answer

Why is my new samsung lcd 32 inch getting on and off again and again it self? and a voice it coming from the back part too.?


Under a year,this tv was bought?Tv still have warrenty,call Samsung for warrenty repair.Not.Tv power on have flashes of pictures,few sec.than dies,have only sound left?Yes.Ur tv have dead 1 or 2 long board call the LCD inverter boards.These 1 or 2 long LCD inverter boards help the LCD screen to have a backlight to produre a picture.Tries websites like Shopjimmy.com,Ebay.com to buy those refurbishes 1 or 2 LCD inverter long boards for the replacement.

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1 Answer

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Ur LCD inverter board is dead.This LCD inverter board help the LCD screen to have the backlight to have light to the LCD screen and get a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement to get ur LCD backlight back to get a picture.This board is a long board in shape.

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Maybe the backlight is out, can you see a picture when shining a flashlight on the screen. if yes you have either a bad inverter power supply or bad screen (panel).

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