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

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ray gallant

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Posted on Jul 11, 2020


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Rylee Smith

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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.


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.
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LG tv black screen with sound

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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.
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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.

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

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Jul 11, 2012 | LG Televison & Video

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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.

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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:
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  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.

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