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The screen is not working

All board ok

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Even though you state "all board ok", it is likely that there is a problem with the power supply

Posted on Apr 23, 2013

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Posted on Jan 02, 2017

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POLAROID P40LCD12 SCREEN AT BOTTOM COMES ON BLUE FADES THEN GOES GREEN ABOUT 5 INCHES LOST ON BOTTOM TV WORKS OK BUT THE SCREENS STARTS BLUE ABOUT 5 INCHES FROM BOTTOM THAT FADES AND TOP HALF PIC OK BUT...


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. 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.

May 02, 2017 | Polaroid Televison & Video

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Dynex PO2-w30-003s no picture sound ok


put a flashlight behind the TV screen or front screen close, just try as close as possible, if you see image that means that the Back-Light inverte is defective or the screen lamps are not working, if deres no imagen the video card is not working (main board)

Aug 06, 2014 | Dynex DX-LCD32-09 LCD TV

1 Answer

No picture w/ sounds and backlight on


The screen controller circuit board isn't working. The board you're looking for is the one that has the wide flat ribbon cable coming from the bottom of the screen

Jan 05, 2014 | Sony KLV32S550A 32 LCD TV

1 Answer

Sony pcg-71315l mother board power on ok capslock ok but no display,15.6 screen ok.


Ether Vga Cable faulty or the screen or on board graphics or graphics card shot

Dec 26, 2013 | Sony Vaio Pcg-71315l Laptop Screen 15.6...

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: sound is ok, no picture, happend suddenly, no one turned light down, background light is ok, power is ok


Turn tv on and place a bright flashlight against the screen. Look around the edge for a moving image. This verify that the image is getting to the screen.

It sounds like the back light inverter board should be replaced. This board supplies power to the fluorescent lamps to light the screen.

If this set is under warranty you should return it to get it repair/replace.

IF YOU KNOW HOW TO WORK WITH ELECTRONICS REPAIR(replacing board ) or have a friend with knowledge/skill you can fix it.
If you have a local source for the board you may get it. Or you

can get the part number off the board in your set and search for it. Since this set model is for the UK a general search did not find the part. However if the 'u' on the end of the model is dropped and then google , several sources show up in the USA. I do not know if the inverter board is the same so you will have to verify.

The board looks something like;
pcb2680.jpg

Mar 02, 2011 | Sony KDL-26S2010U 26 in. LCD Television

1 Answer

My laptop screen is bright. Brightness control works but no picture. The picture is ok on external monitor. Sometimes a faint and incomplete picture appears on startup but disappears after a few seconds....


This might be a sign of a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Aug 25, 2010 | Compaq Presario 700 470024-192 Notebook

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THE SCREEN DONT WORK, IS BLACK, THE SOUND IS OK


Ur LCD inverter board it dead.Must replaced the board.It usally a long board must replaced to get picture back.Tries Shopjimmy.com,Ebay.com to get the board part.

Jan 16, 2010 | Vizio VW32L 32 in. LCD HDTV

1 Answer

Tv screen not work


No picture, FR406 ok
Check the video output amplifier stage for failure
Display dead rest of functions ok
Change transistor Q1701 on Timer operation board

Nov 24, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Front screen went blank


Dear. most chances are that that the flate of ur phone is bad connect be cause of dropping. just open it and reattach the cable will ok. cable is from board to lcd and it may be bad connect on any side lcd or board first check it from board side if no t ok then from lcd side even no ok change a new cable.

Mar 26, 2007 | Motorola Mobility V265

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