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Cello LCD No backlight

My Cello TV works ok, but no backlight.
screen is completely black but system works fine. any help
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Try contrast technologies they deal with cello

Posted on Nov 07, 2008

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What is the model number and how old is the TV?

Posted on Dec 29, 2007

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My lg TV of three and half years has a black screen with images flashin Intermittently. The sound is fine


What is the model number? If it is only 3 years old, I suspect you have a LCD TV with LED backlight. You quite possibly have a failed LED backlight.

Many LG TVs of this age are starting to fail due to over-worked LEDs in the backlight which create the white light that illuminates the LCD image.

The symptom is TV turns on and off ok, gets sound on the connected video inputs, but has an otherwise black screen with no video on display. You can try to operate the TV near a bright window with lots of sunlight and see if you can perceive a faint image on the screen. A flashlight is often not bright enough to be helpful.

Most of the time, an LED will fail as a short circuit and still allow power to flow through it to other LEDs that will still light up. If one of these LEDs fails as an "open circuit", or if several LEDs have failed in the same circuit, then the power supply detects a fault and shuts the TV down. If the LED is intermittent, you may have flickering. Think of having one light bulb burn out in a string of Christmas lights and having all the lights go out until the bad bulb is replaced... kind of the same thing.

Your TV circuits boards should be fine. In my opinion your TV requires a backlight repair which requires complete disassembly of the entire TV including disassembly of the panel which is a difficult process.

Nov 13, 2017 | LG Televison & Video

1 Answer

Cello tv problems


Check and replace its backlight inverter board. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

Mar 22, 2014 | Televison & Video

1 Answer

Blank screen on LCD TV


either the backlight power board or the power board itself isn't powering up the backlight power board

or your backlights are burnt... this is where testing comes in

Dec 30, 2013 | Televison & Video

2 Answers

Black screen but i do have sound


HelloCheck the backlight inverter board. If it has damged, most common fault to LCD TVs, there will be no backlight to the LCD screen, and will look black. Your tV has sound output without picture. This means that all other boards ar functioning well. Check the backlight inverter section and CCFL tubes used in backlight assembly. OK.

Dec 20, 2011 | Hisense TL1700 17 in. LCD Television

1 Answer

The picture on my tv is completely dark, but the sound is working fine. how can i fix the picture? because it's a fairly new tv


Hello
Keep a close look to the screen, and see whether there is any trace of picture on it. If it is there, you can see pale shadow of it moving. If it is there, be sure that the backlight is not there. Thhere is an inverter board to energise the CCFL lamps used as backlight component. If the inverter board got faulty, the CCFL lamps won't light up, and no brightness will be there with LCD TVs. Check it. OK.

Oct 22, 2011 | RCA L26WD12 26 in. LCD TV

2 Answers

My samsung LE40R74BD set works fine for about 10 mins then screen goes blank (black) . It would appear there is no back lighting. I have visually checked the psu for blown capacitors but all seem to be...


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

May 09, 2011 | Samsung LE40R73BD 40 in. HD-Ready LCD...

2 Answers

My Screen will not turn on, even when it is fully charged, plugged in, etc. The computer does power on, but the screen is completely blank, (not even lit, but black) help!


First make sure that this is a LCD problem to do this connect your laptop to an external monitor, so that it is confirmed that your laptop itself is fine.
If connecting the laptop to an external monitor doesn't work it would mean there is something wrong in your system. Most common problem is dislodged RAM, remove your ram and reconnect it properly.
If your system is working fine on the external monitor then go near to your LCD screen when laptop is turned on and look very closely on the screen if you see the anything on it but very dim, it would mean that you have a faulty backlight, the backlight itself is faulty or the inverter.
For further assistance please feel free to contact me.

Apr 01, 2010 | Everex StepNote NC1500 Notebook

1 Answer

JVC LT-37X688 37 in. LCD TV. When powered on there is a brief flash of light on the screen and then the screen is black and stays black. Audio is fine and I can still use all of the remote controlled...


No lamp on LCD tv.The LCD backlight inverter board it dead,that board needed replaced to get picture back.Tries Shopjimmy.com,Ebay.com to buy the LCD backlight inverter board.It usally a long board.The refurbish LCD backlight inverter board about $100-$120.

Feb 14, 2010 | JVC LT-37X688 37 in. LCD HDTV

2 Answers

Screen won't display


I found your site confusing. If you had read my post, you would have noticed that my problem referred to a 15" flat screen 'CELLO' .TV/DVD combo. I had sound but no picture. When switched on, the screen lit up and the word CELLO appeared then the sreen went black

Nov 25, 2008 | Emerson EWF2004 20" TV

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