Question about LG 55LN5100 55" LED TV 1920x1080, 120 Hz, HDTV

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I have a 55 inch lg model55LN5100 powers on and has sound but no signal

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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 23, 2016

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Posted on Jan 02, 2017

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SOURCE: LG 26 inch lcd. Recently it loses the signal from sky remote eye

hi! maybe there is a problem on power supply section or loose connection.

Posted on Sep 01, 2009

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SOURCE: I have an LG led 55 inch maybe about 5 years old, and when I turn the power on the LG logo illuminates but the screen is blank with no sound. The TV menu also does not appear using the LG remote.

Start with finding the model of your TV
https://www.shopjimmy.com/lg

Then


LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Posted on Sep 17, 2016

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LG 55LS4500 55 in. TV has sound through speakers, no audio except a hum from headphones and the optical digital to analog output fiber lights up but no sound output What board is bad?


Hi Louis,
The audio circuitry is located in the main board. Try unplugging the TV for a while and try again if the audio comes back.
I would suggest to check all your settings in the audio section first and if everything seems OK then the main board should be replaced.

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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/
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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.

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1 Answer

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