plasma with vertical lines

[johnjohn]

Re: plasma with vertical lines

thanks i will try that.

[johnjohn]

Re: plasma with vertical lines

i still need your help anyone out there, for almost two weeks i am stuck trying to solved the red vertical lines all over my lg plasma tv screen, already replace two boards Zand Y
how to access the built -in gen test pattern on the control board, LG DU-42 PX12X.

[PowerAmpFreak]

Re: plasma with vertical lines

i still need your help anyone out there, for almost two weeks i am stuck trying to solved the red vertical lines all over my lg plasma tv screen, already replace two boards Zand Y
how to access the built -in gen test pattern on the control board, LG DU-42 PX12X.

So, did you find the service manual yet?
I see two ways of doing this. 1/ Get the service manual and try to figure out which board is defective. 2/ Don't get the service manual and replace boards by guessing. You already replaced two boards on this. As previous post said, there are big chances this failure is caused by the control board. BUT, it may also be caused by the mainboard.
That's why I suggest getting the service manual and carefully check if there even is a testmode pattern available on this set, and so on.

[johnjohn]

Re: plasma with vertical lines

the service manual has no info regarding assessing the test patterns for my model, it do have info about voltage adjustment and the panel block diagram.

[PowerAmpFreak]

Re: plasma with vertical lines

the service manual has no info regarding assessing the test patterns for my model, it do have info about voltage adjustment and the panel block diagram.

Then you have to decide if proceed with the repair and replace the control board aswell. Hopefully you might find a used one on E-bay.
Wizard here on the forum might give his opinion about the chances of control board failure when looking at your pictures in the early posts.

Just to make sure, did you download the model service manual or did you search for a panel manual? It can be quite confusing but the model specific manual use to be quite short. Looking for a panel manual could help in getting additional information regarding the possibility of placing the set in a service/pattern mode. If you look at the panel itself, a sticker usually tells which panel it is, for example LG42V4, LG42V5. Then search for this instead, if you haven't already done so.

I found this when googling for the model:
http://jasonkoller.blogspot.com/2011...ma-tv-fix.html

I know this isn't the same lines as you see, but in this case the control board was the problem.

[PowerAmpFreak]

Re: plasma with vertical lines

When I was referring to control board in previous post I of course meant the logic board and nothing else. Sorry for this.

[johnjohn]

Re: plasma with vertical lines

i did download the panel manual a shorter version than the model manual, even the model service manual doesn't cover any info on service pattern access mode for my model or panel version. my panel is PDP42x2a and the model is DU-42PX12X.

[cadiman]

Re: plasma with vertical lines

RECHECK ALL OF YOUR CONNECTIONS!

Small ribbon cables going in and out of y and z board and also to x drive (lower boards).

Patterns all across screen are related to logic control as mentioned above.

[PowerAmpFreak]

Re: plasma with vertical lines

i did download the panel manual a shorter version than the model manual, even the model service manual doesn't cover any info on service pattern access mode for my model or panel version. my panel is PDP42x2a and the model is DU-42PX12X.

In that case this set probably doesn't have this feature.
I would go for replacing the logic board.

[cadillacman]

Re: plasma with vertical lines

i did download the panel manual a shorter version than the model manual, even the model service manual doesn't cover any info on service pattern access mode for my model or panel version. my panel is PDP42x2a and the model is DU-42PX12X.

dude are you anywhere near northern illinois/southern wisconsin?

i hsve the same set, actually putting bsck togther tonight. if your local we can test your boards in my set untill we find the issue. If you arent local oh well i figured id offer.

[johnjohn]

Re: plasma with vertical lines

no i am not local i am in New York.

[johnjohn]

Re: plasma with vertical lines

OK guys time out, is the any other ways i can check/test the logic board to determine if it is defective, i check all connecting cable Z, Y, both buffer board and X board cables the all check out OK,

[johnjohn]

Re: plasma with vertical lines

hi everyone out their, still need your help have not gotten my TV problems solve.

[steves7839]

Re: plasma with vertical lines

I know this is a super old thread. In this situation (you have shotgun-replaced two boards without fixing the original symptom) buy the third suspect board on ebay from a supplier who will accept returns. Failing that, resell the bought boards that did not fix the issue.
Given the enormous complexity of plasma sets, I don't touch them anymore and wouldn't without first accumulating a significant amount of experience repairing LCD TV's.
Yet another possibility is that one of the boards you replaced already is just as failing as the original it replaced. The only sure way to evaluate this is testing in a known working set of the same chassis/panel, or via a board repair depot that can test your boards.

[Alastair E]

Re: plasma with vertical lines

Clearly a control-board issue to me--Run test-patterns from control-board to confirm.

Vertical-lines would never been caused by the X or Y sus boards, as they have No vertical input/output/references!!

[Alastair E]

Re: plasma with vertical lines

Given the enormous complexity of plasma sets, I don't touch them anymore and wouldn't without first accumulating a significant amount of experience repairing LCD TV's.

Mad!

Why would muchos experience on an LCD help In ANY way At All repairing a Plasma?
--The technology is Completely different--Like fixing a Model T and Ferrari!