LG 47LN575V: My TV has broken backlight. Is it worth trying to repair it?

Mon, 28 Apr 2025 02:38:34 -0700

I know the backlight is the problem, I can see the picture under the flashlight and our local repair shop confirmed backlight is the issue. They however told us replacement parts are no longer available. I do not believe them and want to try repairing the TV myself.

Other than the backlight the TV works just fine. I can change channels, I do hear the sound and when I look really close and use flashlight on my phone, the picture can actually be seen.

Here is my question. I did found the replacement LED strips online. I also found this tutorial on YouTube showing how to install them. I know I could do this no problem.

However, from what I can see in the video, there are multiple individual LED strips connected together. And because my TV has no backlight (it's not just one part of the screen without it, the whole TV has no backlight) I think there is at least a slight possibility it's actually not the LED strips that are broken. I mean what are the changes all of the LED strips would break all at once. Then again they are connected to each other so I see how it could happen. Perhaps it takes just one LED strip for all of them to stop working, sort of like when Christmas lights break.

But I'm still worried it's not the LED strips, but rather some logic and/or power board being the issue.

So, my question is:

Could the issue be something else other than the LED strips?
If it could be, how likely is it that the LED strips aren't the issue and how can I find out what is?

I don't want to order replacement LED strips for nothing. And I also want to know what other replacement parts I should possibly be looking for.

LED strips are cheap, it's worth it to do the repair, but would it still be worth it if something else is broken?

Thanks for answers.

@jayeff, @oldturkey03

Just wanted to let you guys know that the repair was successful. It took a few weeks for the parts to arrive that's why it took me so long to repair the TV.

But today the LED strips are finally here, I just finished replacing and the TV works like new. Thanks for the help to both of you.

⟐ Answered April 28, 2025 at 2:38 MST

LG 47LN575V: My TV turns on for a second and then turn off what's wrong?

Sun, 04 Dec 2022 13:28:31 -0700

My TV turns on for a second and then turn off also the audio comes for time and go,

⟐ Answered December 04, 2022 at 13:28 MST

LG 47LN575V: What do I replace to fix failed backlights?

Mon, 05 Apr 2021 23:18:56 -0700

Hi guys, the tv powers on and plays sound but the picture has gone dark. The picture is visible if you really try to see it so i have assumed it is the backlight inverter that has failed. The only problem is… i have no idea where it is on this tv. I saw on another post someone say it was on the power board, but is there any way i can fix this without having to replace the whole board? I want to get into repairing so changing components is fine with me.

Any help is really apreciated.

⟐ Answer edited April 05, 2021 at 23:18 MST

LG 47LN575V: when I off the tv and after fifteen minutes back to normal

Mon, 28 Apr 2025 02:43:22 -0700

when I off the tv and after fifteen minutes back to normal ... but

after fteen minutes it goes to dim again

⟐ Edited April 28, 2025 at 2:43 MST

iFixit - Answers With Device "LG 47LN575V"

LG 47LN575V: My TV has broken backlight. Is it worth trying to repair it?

Update (12/02/23)

LG 47LN575V: My TV turns on for a second and then turn off what's wrong?

LG 47LN575V: What do I replace to fix failed backlights?

LG 47LN575V: when I off the tv and after fifteen minutes back to normal