Question about Sony Ericsson W850i Cellular Phone

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Backlight or lcd problem

The time i scroll or get into the menu on my phone, it goes blackout but if im going to use some light or flashlight the LCD part i noticed that LCD is functioning sad to say its hard to see without the aid of a flashlight. please help me to my problem coz its my dream phone and its almost two months since i brought this. Thank you very much.

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Replacing lcd will not solve the problem i have tried it

Posted on Dec 15, 2009

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Hi. It sounds like the backlight of the LCD has failed. If you replace the LCD screen that'll solve the problem. See

Posted on Nov 15, 2008

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1 Answer

Has sound, but why no backlight?

This will get you started on your troubleshooting journey.
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Might be the tube light itself too
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Or the inverter
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If you have an LED you might have better luck getting a new TV :(

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Video goes out on insignia lcd

An lcd tv has to have a light source behind it to see the picture. Older ones have flouresent tubes. Newer set have light emiting diodes(led). You need to determine if the backlight is turning off or is set loosing signal. If you press the menu button on the Insignia remote does the menu appear on the screen. If not hold a flashlight on the front of the screen. if you can slightly see some video the the back light is off. If the menu shows then check the signal source. If back light is out the replace the inverter board.

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1 Answer

My samsung r20 backlight keeps going off, if i press the Fn and F5 button it comes on for a second and then back off

If you can see the images on the screen very faintly when you shine a flashlight on the screen, then your problem more than likely is the LCD Inverter. The LCD Inverter costs less than $10, but you will have to disassemble the lcd screen to get to it.

I'm sure you know that you can attach an external monitor to your laptop and hit the FN key and hold it while you hit the correct F1 thru F8 key that will display the image on the external monitor? This could be a solution until you get the inverter fixed.

Now a dishonest repairman will take advantage of you if you take that laptop to them talking about the backlight is going bad. He'll simply bill you $300 and tell you he had to replace the LCD Screen which houses the back light an most times it's easier to replace the screen then fool with the backlight. And in your case all he would do is replace the lcd inverter that sits under the lcd screen and is covered by the strip at the bottom that goes around the lcd screen.

Mar 20, 2012 | Computers & Internet

2 Answers

My player screen blackout. Got power and can listen to the song but no screen.

Welcome to Fixya. If the mp3 player is still playing the audio, it means that the mp3 is working fine. The problem that you have is that the LCD or the display of the Mp3 is bad. You can check the warranty of the device so that so can send it to repair or replacement free of charge,

Sep 28, 2011 | Sony NW-E003F MP3 Player

1 Answer

The picture appears for 10 seconds and after that it goes blackout but i can hear the sound.

You have a problem with either the inverter which drives the screen or the backlights in the LCD panel. A new inverter board may cure the problem but more likely the trouble are the backlights failing in which case a new LCD screen is required unfortunately.

Dec 27, 2009 | LG 42LC2RR 42 in. HD-Ready LCD TV

1 Answer

Acer AL1912 19" LCD Monitor goes black after power up

With the screen connected to the pc (which is running and putting out a signal) hold a bright light to the front of the lcd - a led flashlight works well. Do you see an image? If so then circuitry driving the inverter backlights may be at fault. I had this happen with a Dell Flat Screen, and found one of a pair of transistors which drives the backlight had developed a short.

Aug 01, 2009 | Acer AL1912 19" LCD Monitor

1 Answer


is it that the back light goes off and on or check you lcd display settings and see how you have it set to.

Oct 26, 2008 | Sony Ericsson W850i Cellular Phone

1 Answer

Sony KDL-32ML130 lcd tv

Not really that tough. Sounds as though the backlight is shutting down, either from a power supply failure, or a failure of the backlight circuit itself. You can verify this by holding a flashlight to the screen in the area where the menu usually appears to see if it displayed on the LCD panel with no backlight. If you can faintly see the menu displayed, your backlight has shut down and the most likely cause is the backlight inverter board, followed by the power supply and the backlights themselves which are part of the LCD panel. If you found this information answered your questions, please be sure to rate it. Thanks!

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4 Answers

Nokia1600 repairing

hi there sir must go to your nearest service center to replace your LCD it must be damage already. the light of that phone was built-in to the LCD display. and that is why also your keypad doesn't have light cuz' it is series to the display light.


Mar 30, 2008 | Nokia 1600 Cellular Phone

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