Re: plasma with vertical lines
thanks i will try that.
thanks i will try that.
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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.Comment
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Re: plasma with vertical lines
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.Comment
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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.Comment
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Re: plasma with vertical lines
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.Last edited by PowerAmpFreak; 05-04-2011, 12:59 PM.Comment
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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.Comment
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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.Comment
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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.Comment
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Re: plasma with vertical lines
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.Comment
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Re: plasma with vertical lines
no i am not local i am in New York.Comment
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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,Comment
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Re: plasma with vertical lines
hi everyone out their, still need your help have not gotten my TV problems solve.Comment
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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.Comment
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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!!TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.
Problem
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Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesnβt display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed... -
This is my 2nd broken TV I'm trying to fix and haven't been able to figure out... currently going without any working TVs so am hoping to be able to fix one..
This Samsung PN50B430P2D Plasma has this big block of vertical lines which will fade in shortly after turning the TV on. The lines will sometimes flicker a bit or fade in/out and sometimes it just stays present. The length of time it takes them to appear varies, sometimes its a few minutes and other times it appears immediately after powering on.
I have attached an image of the TV with these bars displaying.... -
Friend of mine has a Samsung Plasma panel with some vertical lines that are starting to form on the screen.....Ive never worked on a plasma panel, so Im not sure what to look for, would this typically be a main board issue, or something else?
Any help would be appreciated.....Please let me know.......
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