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How to fix a LG 50LN5100

I have sound but no picture. I don't see backlight but I can see image if I use a flashlight

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6ya6ya

6ya staff

  • 2 Answers

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Posted on Jan 02, 2017

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Larry

  • 2800 Answers

SOURCE: LG 50ln5100-ub flat screen tv

You have lost your backlights and this is very common for the LN series LG TVs...they use 6 volt lamps and if one opens the entire string goes out, kind of like the old Christmas lights used to be. First thing to check though if your able is the voltage on both sets of cables, hook your meter to one side of the power board that supplies the lamps and see if you have voltage for a second or 2 when you power the set up and then it drops off to almost nothing, if you see this unhook the plug that goes to the lamps in the panel and see if the voltage holds at a couple hundred volts, if it does its lamps in the panel and I think you will find this is the case, if it happens the voltage drops down or isn't any to start with its the power board...Good luck

Posted on Feb 05, 2018

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Larry

  • 2800 Answers

SOURCE: How do I fix LG 47LN5750 TV with NO picture but HAS sound?

This is a LED TV so there won't be an inverter board, they're only on LCD sets, what is wrong with your set is you have shorted LED lamps in the panel, its a common issue with this model TV, Ive replaced dozens of them in the last couple yrs, its not a fun job to do as the panel can be damaged very easily if extreme care isn't taken when handling it, watch some youtube vids to get an idea of how to do it...Good luck!!

Posted on Apr 04, 2018

chinavasi100639

Abctay.com

  • 361 Answers

SOURCE: Repairing TV,sound works, see screen w/flashlight. However no backlights show,unsure what board I need to replace I have a LG 50LN5100. What is the actual board that needs replacement picture below.

Ohh,good news,Abctay.com is a Sharp tv parts online store,SHARP RUNTKA903WJQZ QPWBS0398SNPZ(1Y), PSD-0863 POWER SUPPLY BOARD
https://www.abctay.com/original-sharp-runtka903wjqz-qpwbs0398snpz1y-psd0863-power-supply-board-p-1087.html

Posted on Dec 20, 2018

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1 Answer

How do I fix LG 47LN5750 TV with NO picture but HAS sound?


This is a LED TV so there won't be an inverter board, they're only on LCD sets, what is wrong with your set is you have shorted LED lamps in the panel, its a common issue with this model TV, Ive replaced dozens of them in the last couple yrs, its not a fun job to do as the panel can be damaged very easily if extreme care isn't taken when handling it, watch some youtube vids to get an idea of how to do it...Good luck!!

Apr 04, 2018 | LG Televison & Video

1 Answer

LG 50ln5100-ub flat screen tv


You have lost your backlights and this is very common for the LN series LG TVs...they use 6 volt lamps and if one opens the entire string goes out, kind of like the old Christmas lights used to be. First thing to check though if your able is the voltage on both sets of cables, hook your meter to one side of the power board that supplies the lamps and see if you have voltage for a second or 2 when you power the set up and then it drops off to almost nothing, if you see this unhook the plug that goes to the lamps in the panel and see if the voltage holds at a couple hundred volts, if it does its lamps in the panel and I think you will find this is the case, if it happens the voltage drops down or isn't any to start with its the power board...Good luck

Feb 05, 2018 | LG Televison & Video

2 Answers

I have a 32" Samsung LED TV with not picture. Audio is working.


Do flashlight test - if you can see image you need t con board. If no images seen, inverter board. TV Parts Universal TV Stands DLP Chips ShopJimmy

Sep 18, 2017 | Samsung Televison & Video

1 Answer

Lg 47ln5700


T con board is responsible for the image you see on screen.

Sep 15, 2017 | LG Televison & Video

1 Answer

Samsung UN55H6203 has sound but no picture.


Backlight inside of display defective. One ore more of the led strips must be replaced.

Jun 17, 2017 | Samsung Televison & Video

1 Answer

My LG tv (Model number: 32LS3410-UB) has sound, but no picture. When I do the flashlight test I can see a very dark image on the screen. Will replacing the LED driver fix this problem?


If you already tested with the flashlight which is the first step in the blank screen with sound fault then you have to test the LED Backlight supply voltages if you are familiar and good in the electronic repair. First you have to check if bulging capacitors for the LED Backlight drive voltage circuit, replace them. If capacitors are good then you have check the backlight LEDs. The flashlight test proves that the power supply is good and TV is working fine because the sound is ok and picture is fine. Attached videos and links may help you for the repair and replacement of backlight LED strips or LEDs itself depending on the type of LED strips used in your model.
https://www.youtube.com/watch?v=Z1DEkSguWtg
https://www.youtube.com/watch?v=YgaL6X6eSaU
https://www.youtube.com/watch?v=EZVQKEp6jxk
https://www.youtube.com/watch?v=T2FboV-1PJg
https://www.youtube.com/watch?v=2pyuXwNkBMA






May 08, 2017 | LG Televison & Video

1 Answer

Hi. I have a Samsung LED 46" model #UN46EH5000FXZA, with no picture but has sound.I replaced the power supply board & T-Con board & still no picture but have sound. What can I do next??


Do flashlight test to see if y0ou can see an image - if so replace the inverter board that powers backlights. If no image then go for the main board.

Aug 12, 2016 | Samsung Televison & Video

1 Answer

Backlight for tv


One or more of the LED backlight strips behind the LCD have failed. Difficult and sometimes expensive to fix.

Jul 08, 2016 | Vizio E550i-B2 55" LED TV 1920x1080, 120...

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