Question about LG 47LN5400 47" LED TV 1920x1080, 120 Hz. HDTV

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LG 47LN5400-UA LED picture has gone out. Audio works. Using flashlight I can see faint menu image. LED Driver or LED Strips? How can I tell?

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electro-medical.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board..

Posted on Dec 24, 2016

Testimonial: "This is what i am referring to, it is a warning on the ShopJimmy site when I lookup the LED Driver I need. My question is this, if I can see the menu on the screen when using a flashlight, is it possible it is no the LED driver but the LEDs? PLEASE NOTE: Models that use this power supply are also HIGHLY susceptible to LED failure. What may seem like a power supply failure may be caused by the failure of one or more LEDs inside the panel (screen). We stock most LED strips for the models in question. Please search your model number to view the available LED strips."

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Posted on Jan 02, 2017

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1 Answer

LG 42LN5400-UA.BUSYLHR back lights not working, sound working, flashlight test shows video working.


This is a common problem for LG 42LN5xxx & 47LN5xxx LED TVs, the problem is defective LED back lights strips, it has nothing to do with main power supply & the main board.
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Aug 31, 2017 | LG Televison & Video

1 Answer

My LG tv model number 42LN5400-UA no picture


It is a common problem for the LG 42/47 LN series LED TV, the problem is defective LED back lights strip (strips).

You have to open the display panel to find the bad one & replace it. The part number usually is printed on the strips, read 6916L-11XXA, you may purchase it from EBay.

Aug 11, 2017 | LG Televison & Video

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Ive got a LG 55" LED tv model #55LA6200 it will turn on and show the LG screen then goes black after a few seconds. Audio works and i can see the screen with flashlight which part do i need.


This could be the power supply at 55 dollars or the LED back light strips that are about 80. Unless you know how to test them, it is a toss up. Most of the time it is the led strips though. http://www.shopjimmy.com/lg/55la6200-ua

Feb 22, 2017 | LG Televison & Video

1 Answer

Lg tv power light comes on but screen stays blank


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

Dec 05, 2016 | LG Televison & Video

1 Answer

LG 47LN5400 UA no backlight, but can see menu using the flashlight test.


Contact LG Edward at 800 243 0000. Thank you and leave feedback

Jul 12, 2016 | LG Televison & Video

1 Answer

Can you tell if LED tv has bad LED strips before changing LED Board/Power Supply (as they're in one piece on a lot of TVs)?


This is not easy to diagnose, either use a meter on the power cable to the led or check the leds one at a time

Feb 24, 2016 | LG 47LN5400 47" LED TV 1920x1080, 120 Hz....

1 Answer

Which part needs replacing on the TV? See details.


Fault to the main power supply regulator section. Either it will be on a separate board, or on the part of its main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Aug 26, 2015 | LG 47" 5400 Series LED HDTV - 47LN5400

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