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

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Claudia Rizza Posted on Jan 14, 2017

I have a 3 year old LG, led 47", model no. 47LN5400. TV has sound but no images. I tested the tv according to tutorials, and with a flashlight I am able to see the images. What is the problem?

To Whom It May Concern, I have a 3 year old LG, led 47", model no. 47LN5400. TV has sound but no images. I tested the tv according to tutorials, and with a flashlight I am able to see the images. Could you please tell the actual problem and how to solve it? Thank you in advance. Sincerely, Claudia

5 Related Answers

budmrtn

Bud Martin

  • 11361 Answers
  • Posted on Dec 16, 2009

SOURCE: 47 Inch LG HD TV -switches itself off and remain off for days

He may be right, LG is used to be called GOLD STAR, which makes junky electronic products, they changed the name to make it sounds better.
You may be able to get parts here: http://www.shopjimmy.com/catalogsearch/result/?q=LG+42LC2D+

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Chi Chu

  • 8457 Answers
  • Posted on Jan 08, 2010

SOURCE: When I turn my LG tv on it takes over 15 minutes

Power Supply board have bad leakage capacitors,puff up or burt open.Know how to solder?Search those Capacitors replaced them in ur power supply.Ur tv should power up right away.

Anonymous

  • 506 Answers
  • Posted on Jun 12, 2011

SOURCE: lost the parental lock code for lg 47 led tv any

Try the generic unlock code of 7777.

Anonymous

  • 2 Answers
  • Posted on Dec 13, 2011

SOURCE: lg 47 inch tv sound

I have the lg 47 lcd and i had the same problem for about 1-2 months ,but out of the blues the sound just got really louder ,i think the speakers broke in and it the sound normalized.But my tv sounds great now , my kids even asked me if i did something. Maybe just give it a little time.

Slinteriors

Sonny Berry

  • 8617 Answers
  • Posted on Jan 05, 2012

SOURCE: lg 42lg50 LCD tv has audio but no picture

The backlight is out most likely caused by either the T conn or the Invertor. The invertor is most likely you can get replacement boards from www.tvcircuitboards.com leave a email if your not sure what you need.

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LG 47LN5400 FLAT SCREEN SOUND BUT NO PICTURE, BUT YOU CAN SEE SHADOWS OF PIC IN THE BACKGRND. MAIN BOARD REPLACMENT? CAN I DO IT MYSELF

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.
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My TV is a LG 47LN5700-UH I had a lightning strike near the house. Afterward TV would start but not boot completely. Now it won't start at all. Cable box also got fried at the same time.

The led driver AND the T-con board are bad. If you could see a picture with the flashlight then the T-con board would be good. It is not. The led driver can be on the main board or the power supply board. You can get these parts from here: TV Parts Universal TV Stands DLP Chips ShopJimmy
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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?

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..
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LED tv LG 50LN5200 with no picture but has sound

Faulty the backlight
It is necessary to remove the panel and replace defective LEDs

Best Regards!
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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
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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/
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