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

1 Answer

Help fixing my tv

The screen went black. The flashlight test shows the picture. Is it the T-con board, or LED driver?

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  • LG Master
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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://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.

Posted on Jul 23, 2016

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5 Suggested Answers

Allan Savage

  • 321 Answers

SOURCE: Picture goes black after a minute or so...

your problem come from the back light source
call ballast power supply or side neon are burn
you probly need a tech to fix it.
hope that will help

Posted on Apr 23, 2010

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gopakumarg43

The Knight

  • 76237 Answers

SOURCE: lg led tv backlight

Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. 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/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Feb 05, 2015

gopakumarg43

The Knight

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SOURCE: I have a LG led tv 55LS4500. Tv is showing a black screen, but has sound and the backlighting is good. I have replaced the tcon board with no results. What should my next course of action be?

Sounds like panel fault. Contact the authorized service center for LG. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

Posted on Aug 15, 2015

gopakumarg43

The Knight

  • 76237 Answers

SOURCE: Led tv model Lg55la6205 flashes once when first powered on and won't show lit picture after. Sound is fine. I can see the tv showing live tv with a flashlight. What do I need to do to fix it?

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.

Posted on Sep 24, 2015

me02450

EMCS Engineers

  • 78 Answers

SOURCE: TV problem

possible t-con board failure

Posted on Dec 11, 2015

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