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Lg tv power light comes on but screen stays blank

It's a LG 55" LED TV, model # 55LV3700-UD. When you turn on the power, the power light comes on, but the screen stays blank. The backlight test indicates that there is no backlight. The flashlight test - all I see is a reflections of the flashlight. What to try next? Thanks,

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If you can't see a faint picture with the flashlight then the T-con board is gone. If you can see a faint picture, then the led driver or ballasts for the back lights quit. You can get parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy

Posted on Dec 06, 2016

Testimonial: "Thanks for your reply Lawrence! Just to confirm, I have no backlight, and no faint picture using a flashlight. I'll give the T-con board a try if I can find one in stock somewhere."

  • Lawrence Oravetz Dec 10, 2016

    I'd make sure the power supply is delivering all the voltages to the other boards first.



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Posted on Jan 02, 2017

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To let you know , there jave been may claims against this 42" model There were some models released that had faulty power boards and video controller boards. LG recalled many of these to have them replaced

No picture and sound is Y +Z Sustainer problem.However, normally they have to change both Y Sus and Z Sus boards atthe same time. If you lucky than it's just a fuse on the Y sustainerblown (the chance is very rare) otherwise the IPM (Intelligence PowerModule) on the Y/X sustainer board is short. This is a common problemand costly to repair.
Is it under warranty or Extended 5 year warranty? If so get it repaired now.

Call customer service for help 877-543-8325 to try them first

If you are skilled in electronics the cost of parts is about $250 online (Otherwise add another $400 for labour and travel if you use a tech ) Always ask for a quote first))
Just ensure you select the right model as i am unsure this link is correct one. But the place itself should have your model

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Posted on Sep 14, 2009

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Power supply board is dead,replaced the power supply board will get power.

Posted on Jan 27, 2010

  • 28 Answers

SOURCE: my lg plasma tv stays on standby

is you already change the power board,is possible
your y board is a big board on the left side of the tv

Posted on May 19, 2010

  • 1 Answer

SOURCE: lg 42 plasma model 42pc3d-ud: had a really bad picture so

I Have An LG - 42PC3D-UD, When I Turn It On "It Have Sound And A Very Bad Picture.

Posted on Apr 13, 2011

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