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Hi there, cn you help me diagnos my lg tv...there is a backlight but no display

Posted by Wilmar Macalisang on

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ray gallant

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TRY A DIFFERENT INPUT OR SOURCE

Posted on Jul 11, 2020

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rylee_smith

Rylee Smith

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SOURCE: Hi Guys, I am working on

Hi


Thanks for using FixYa. Hope you already know that this cannot be corrected through the MENU options. To resolve this issue you'll have to open the back of the unit and check the inverter board which is the power supply source for the backlights. The issue can be a bad inverter board and/or the inverter board is not getting 20vdc from the power supply maybe due to the connector that has gone bad/loose.All this is only recommended to be done by someone who has electrical expertise and knows about the internal circuitry of the unit. Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

Posted on Sep 08, 2010

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I have an LG LED TV model 50LN5600-ui. It has no picture, does has sound and the backlight turn on for just a second. could it be the T-com or LED strips?


Hi Omar,
Most likely it is the backlight in your TV causing this problem. Please check the backlight strips if you can. T Con board has nothing to do with this fault. I hope it helps.
Good luck.

Mar 29, 2018 | LG Televison & Video

1 Answer

LG tv black screen with sound


Hi Tommy,
This is a common problem with LG LEDs. It is a backlight failure. Either the backlights are not receiving the power to drive them or some of the LEDs in the backlight array have failed.
I hope it helps.
Good Luck.

May 25, 2016 | LG Televison & Video

1 Answer

Hi I have a TV that have no image but I can hear the sound when I adjust the volume and switching the channel. I assume it may be the backlight failure after doing some research online.


I would call LG tech support and ask them which of your boards has the circuits normally contained on the inverter board.

You are on the right track.

Nov 08, 2015 | LG LN5100 50" LED TV 1920x1080, 60 Hz,...

1 Answer

LG smart 47ln5700 the screen will go black i still have sound but no picture i could make out the picture in some angles need help on what parts i should replace(picture with flashlight on it)


Hi Angela,
The backlight system of your TV has failed. Mostly it is the inverter part inside the TV which makes necessary power for the backlights fails. The power/inverter board needs to be repaired or replaced.

May 26, 2015 | LG Televison & Video

1 Answer

How do I change a bulb on a LG 42LD550 lcd tv?


When you say bulb, I presume it is the CFL backlight of the display. This cannot be done without the help of a qualified service technician, as the display is a very complicated and complex pieces of components and filters.

Jul 11, 2012 | LG Televison & Video

1 Answer

Hi I just bought a LG M2362D tv monitor and somehow the backlight level (feels like the backlight) will change to very dark automatically every 5 or 10 minutes then back on bright again in 1 minute does...


The tv have a long board that called the tv LCD inverter board,this tv LCD inverter board only job are to control and help the all the amount of the tv LCD screen panel backlight brightness for the tv LCD screen panel for light.This long LCD inverter is the causes and the problems.New tv exchange it for another one,not so new take ur tv warrenty repair qickly the tv long LCD inverter board it is the causes an the problems must have to be change.

Sep 13, 2011 | LG M2362D 23 in. LCD TV

1 Answer

Screen displays no signal after a power failure; can hear sound, no picture


It's either the backlight lamp or backlight light inverter is busted due to the power failure.Here's how to determine which is which:
  1. Grab a flashlight.
  2. Turn on the TV.
  3. Shine the flashlight onto the screen.
  4. If you cannot see any display even a faint one, the backlight inverter is dead, else the backlight lamps are busted.
  5. Replace which ever is the culprit.

Sep 25, 2009 | LG 42LC2D 42 in. LCD HDTV

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