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My lcd screen back light does not light up, but i still can see the picture.Do i need to replace a new lcd panel?

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The picture is dim ? then you have to check the cable that gives signal to the lcd panel, take it to the technician some times this also happens due to loose cable

Posted on Oct 05, 2009

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Toshiba lcd 42x3030db sound but no picture. just went black screen??what do i need to fix if possible.


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/
In some models of LCD TVS; the backlight inverter will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, it can't be replaced. In this case; a panel replacement is the only repair.

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Only TOP half of picture shows, rest is black???


No,problems u discribing the LCD screen panel some how it shorted and dead.Replacing the LCD screen panel is not an option,because LCD screen panel are 90% of the tv,so replacing it.LCD screen panel will cost the same as a new tv,because LCD screen panel are limited produced by the tv corporations.It time to buy a new tv.

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I have no picture. Sound & Signal are working


Hi,
It seems back light inverter board is not producing voltages to lit the back light inside lcd panel to show the picture on lcd screen.
Please replace back light inverter board to get tv fixed. Local tech will help you if you are not familiar with tv repair.
Thanks.

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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.

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check if the back lamps are still on when you lose image, all you have to do is get close to the screen and make is totally black and if is not that means you have a back light working, but if the back light is gone you may have a defective panel.

talked to samsung TA about the same problem I had and the recommend to replace the power supply first to confirm a defective panel because a panel is quite expensive

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Rca L32hd31 lcd no picture blank screen.


Your mainboard is damaged, replace it and that will solve your issue.

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1 Answer

Toshiba L350D Screen Loss


you may plug off remote monitor power on to see carefully is there normal dark picture on your lcd screen,
!) lcd dark but there is pcture on the screen, it means the back lights inverter damage(which in the lcd lid and downside of lcd panel), or lamp damage (in the lcd panel), have to replace new parts
2) no any picture and dark panel, you may check lcd signal cable plugs are right seat in the sockets (which located between the back of lcd panel and motherboard), also check the inverter cable same thing (it merges in LCD cable) . it is better replace a new cable (most cases are cable disconnection somewhere)
is this helpful please feedback when you checked, iwill tell you what you can do next, thanks

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1 Answer

Picture washed out, can't get it right


LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:

Symptom: No picture on screen but LCD TV still has sound.
Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound.
Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture
Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound
Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits
Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright
Solutions: The problem is cause by defective LCD Panel.It needs to be replace.

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