20 Most Recent LG 47LN5400 47" LED TV 1920x1080, 120 Hz. HDTV Questions & Answers


Yes you can do-it-yourself its sounds like the Back light led's in the back of the flat screen are not getting power. it could be 1 of 2 boards inside the chassis of the TV look online and put that model number in when you look.

LG 47LN5400 47"... | Answered on Mar 07, 2019


LG LED TV has no picture (black screen) but still sound ...

www.tomsguide.com/answers/.../led-picture-black-screen-sound-fixed.ht...
My 32' LG LED TV has suddenly lost picture! The sound is all right but the Screen is pitch black. After switching it on the picture flashes for a second and then the screen goes completely black.

LCD Easy Fix (sound but no picture) - YouTube

? 4:52
https://www.youtube.com/watch?v=IBRE1Dcyxp4
Jan 13, 2012 - Uploaded by Clay Whitehead
TV Has Sound But No Picture Troubleshooting Guide - Duration: 2:30. by Repair.com 472,733 views. 2:30. LG LCD TV REPAIR -NO PICTURE ...

LG 47LN5400 47"... | Answered on Jun 20, 2018


The board that controls the back light for the screen is called an inverter board. Sometimes, depending on the model , the inverter is combined with the power supply board. Go here to find the parts :www.shopjimmy.com

LG 47LN5400 47"... | Answered on Apr 05, 2017


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..

LG 47LN5400 47"... | Answered on Dec 24, 2016


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://electronicshelponline.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.

LG 47LN5400 47"... | Answered on Dec 13, 2016


If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Disassemble & reassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.

LG 47LN5400 47"... | Answered on Sep 10, 2016


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://electronicshelponline.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.

LG 47LN5400 47"... | Answered on Jul 23, 2016


Check the cable. Possible bad HDMI (or whatever you use).

LG 47LN5400 47"... | Answered on Jun 28, 2016


Need more info please what seems to be the problem with the bulbs

LG 47LN5400 47"... | Answered on May 14, 2016


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.

LG 47LN5400 47"... | Answered on Apr 11, 2016


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

LG 47LN5400 47"... | Answered on Mar 14, 2016


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

LG 47LN5400 47"... | Answered on Feb 24, 2016


Hi Stephen,
This is a case of backlight failure. Some of the LEDs in the backlight array have failed and causing this trouble. To repair it the LCD panel has to be opened and I am sorry You can not do anything about it yourself, because it is a highly delicate job and needs a fair degree of expertise. You will have to handover the job to some good local TV Tech.
Good Luck.

LG 47LN5400 47"... | Answered on Feb 02, 2016


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/
http://electronicshelponline.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.

LG 47LN5400 47"... | Answered on Jan 03, 2016


Fault in the main power supply regulator 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/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

LG 47LN5400 47"... | Answered on May 14, 2015

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