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Hi there, I have a soniq 50" Plasma TV which recently has some problems. It always displays some vertical colour lines. We can clearly see them on blue screen. Those lines are very thin (may 1 or 2 pixel thin) and pink colour. Those lines appear in the same spot, not moving or disappear. What could be the problem and how to solve it? Is the panel faulty? I've uploaded a picture here. http://picasaweb.google.com/103483116636798716914/TV#5514452352388749922 Could anyone help me?

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  • L_Vasanth Sep 09, 2010

    What is inverter board. I just opened the back cover. I see one board which is power supply, and one board on right hand side with one fat bus, which should be for back light. In left hand side, One big board is connected to another board, which has some data buses attached to panel. Do you refer the vertical board which has those bus connection as the inverter board? or the big board on left hand side?

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You have faulty sustain boards on your tv. You should replace both of them to resolve this problem. Should cost you about 200$ for the parts. Its not a very difficult repair and you can replace them yourself as long as you know what not to touch(some components hold residual voltages).

Posted on Sep 09, 2010

  • 5 more comments 
  • eagle338
    eagle338 Sep 10, 2010

    Please get me an image so that I can spot it for you. Or you can get me the part numbers off the boards so that I can tell you which one is the inverter.

  • eagle338
    eagle338 Sep 10, 2010

    Ooops sorry about that! Got misled by your comment. I was not the one who posted about the inverter. Plasma tvs do not have an inverter board. Its a fault with the sustain board like I said. Inverter boards are only present in in LCD tvs.

  • L_Vasanth Sep 14, 2010

    Sorry for the late reply. I showed my TV to one technician, he said it should be panel faulty. I'm confused and haven't decided what to do. I found that it would cost me 200 $. I'm afraid to take a risk for 200 $. Are you sure it would fix the problem? I clearly know one thing that I should've had 4 years extended warranty ;-(

  • L_Vasanth Sep 14, 2010

    http://www.fixmyplasma.co.uk/epages/Stor...
    Is this the board you talked about? I found the part number and search on the Internet. I just give you the link for the upper board.

  • eagle338
    eagle338 Sep 15, 2010

    Its not the panel. He said 200$ . You will not get a panel for 200$. He is just confusing you.

  • L_Vasanth Sep 15, 2010

    Sorry for the confused reply. Yes I know the panel faulty can't be fixed. I found that the sustain board will cost 200$. I am confused whether panel or sustain board is faulty. I'm afraid to spend money without knowing the exact faulty part. If the sustain board replacement cant fix it, i'll loose money. That is the problem. That's why I asked you that are you sure it is sustain board faulty. Thank you for the useful suggestion.

  • eagle338
    eagle338 Sep 15, 2010

    Stores like shopjimmy offer a refund with in 30 days. I don't think that a panel will die so suddenly, so I think its most likely the sustain board itself.

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From what i can see from the picture the inverter board is faulty and needs to be changed, you may have to contact the manufacturer to get hold of the part you need, the inverter controls the signal to the screen, so it would explain why you are getting the lines on the screen.

Posted on Sep 08, 2010

  • jimnuggats Sep 09, 2010

    Yes that should be the inverter board, it should connect to the board that has the back light connections, the other board will be the control board where you connect the input signals, would you be able to take a photo of it so i can be sure. thank

  • jimnuggats Sep 30, 2010

    There is an inverter in a plasma tv it is more of an extension to the power supply board, if the sustain boards where faulty you would see more lines on the screen but only in the top 3rd middle or lower 3rd of the screen, it is unusual for both sustain boards to go at the same time.

    The sustain boards are connected directly to the control board which recieves the signals from a external source, the control board needs to receive a signal and voltage from the inverter/power supply, if it is not recieving the correct signal from the inverter/power supply then the control board does not send the correct signal to the sustain boards, which then show a more random destorted line array that you have on your screen.

    Your best bet would be to change the inverter/powerboard rather than the sustain boards as from the photo i dont think they are at fault, and it would be quite a bit cheaper to fix.

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