Question about LG 37LG30 37 in. LCD HDTV

2 Answers

32LC7D LG tv has pastel vertical lines running through it. Can't see picture but can still hear sound. Occasinal flicker of picture but then mostly lines.

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  • pattoningene May 15, 2010

    Previously I had listed the model of my tv wrong and it was suggested it could be the inverter board, why would this answer be completely different than the other?

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2 Answers

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  • Master
  • 566 Answers

Hi patton
To answer your first question;
The problem you have is caused by the lcd controller also called t-con board.
To answer your second question;
That is because the first guy you talked to didn`t know any better.

Posted on May 15, 2010

  • Jacques Marin
    Jacques Marin May 15, 2010

    Are you still with me?

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  • Master
  • 10,594 Answers

Hi,
It seems LCD Panel problem and I'm afraid, lcd panel will be replaced to fix the problem.
LCD Panel (screen) is unrepairable part and only option is to replace it.
Let me know if you have additional question.
Thanks.

Posted on May 15, 2010

  • Shahid Electronics
    Shahid Electronics May 15, 2010

    I do not know what was previous question, my answer based on symptoms that you said in current question.
    If back light inverter board got failed, tv wont show you even these distorted lines.
    Thanks.



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You may have muiple problems, the vertical lines can be caused by bad T-CON board or LCD panel, buttons do not response can be caused by bad main logic board. In this case, you need to inspect the power supply module first since poorly filtered DC can cause a lot of strange symptoms.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx

Please post back what you find.

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There are no fans in this model but it looks like either the backlights in the screen are breaking down after they have warmed up or a problem in the inverter board, again part of the driver circuit breaking down after a period of time. They inverter boards can sometimes be replaced seperatly but usually come with a new screen which if the backlights are at fault then the screen would need to be replaced.

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