Lg w2453v

[gunnish]

I have a LG W2453V that initially did not start up. I found several bad caps so i changed all the caps on the secondary side. After this the monitor actually shows picture, but it is blurred.

Check the attached picture, there shouldn't be green/red dots everywhere. There is no signal cable connected, that is why it says so, but the same problem remains when connected via VGA. I have not tested DVI/HDMI yet.

What should I do about this?

[budm]

Re: Lg w2453v

Did you already re-seat the LVDS cable between the logic board and the LCD Panel?

[gunnish]

Re: Lg w2453v

Did you already re-seat the LVDS cable between the logic board and the LCD Panel?

Yes, twice.

[Davi.p]

Re: Lg w2453v

i don't know if is possible to test it, but if you provide it a black screen signal from pc maybe you must measure 0v on all data lines on lvds cable, if you provide a red screen you can measure for example 0,2v on one line and a 3,3v on another, this for a well working monitor or in case of damage on the tcon board, if it isn't is maybe a scaler bd error..

[gunnish]

Re: Lg w2453v

The controller IC is obviously a suspect here, but can it be something else?

[selldoor]

Re: Lg w2453v

You are probably correct - but is the pattern of the extra image always the same.
What do you get with an all black image or all white.

[Davi.p]

Re: Lg w2453v

the test that i've suggested is not suitable. you must use an oscilloscope with better 100mhz freq.

[czan]

Re: Lg w2453v

Hi guys,

Me also have a LG W2453v with the same failure symptoms.
I have changed all capacitors on the power board (bought a kit from Ebay).
Today I received a new logic board from China ..... still the same failure.

When the screen goes black I use a flash light but I can´t find any image in the background. What´s wrong? Why no image in the dark background? I guess the logic board need some voltage supply from power board....

How do I fix this problem?

TIA