Question about LG Televison & Video

3 Answers

I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.

I was watching it and all of a sudden the picture went black. The sound is still working. The TV has picture using the flashlight test, and I am trying to determine if the power supply went out, or if it is the LED strips. I haven't had any problems with the TV in the last three years and all of a sudden I have this problem. Thanks in advance

Posted by on

3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • LG Expert
  • 109 Answers

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 your 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

Posted on May 10, 2017

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Habit-Forming:

    Visited the website for 3 consecutive days.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 46 Answers

Https://www.Abctay.com is an online shop ,
We sell television and electrical accessories,all kinds of TV power supply board, logic board, TV LED screen,
TV LCD screen, mobile phone screen, as well as various types of electronic tools,tv parts power supply,LCD,ccfl ,
LED,OLED,lcd panels,HMI,Inverter,LCD screen,lg screen,display screen,lcd monitor,lg lcd, lg monitor ,flat screen ,
touch screen,hmi,bulb,samsung, innolux ,Mitsubishi,philips, hitachi,auo,innolux,Planar, toshiba, siemens,chi mei,Weinview,
Infineon,industrial LCD,industrial control, sharp monitor,vigor plc,delta, mitsubishi lcd,omron plc,etc

wholesale Samsung BN44 00715A L55G2Q ESM PSLF151G06A Power Supply Used

Posted on May 10, 2017

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • LG Master
  • 73,619 Answers

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 Apr 26, 2017

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

LG 55LH90-UB LED TV I have an LG 55LH90-UB LED tv that has, what seems to be, sections of dim areas.


Hi ,
try swapping the screen with another one to just see if it is behaving the same, because some times the screen circuitry or the led screen could be damaged .

good luck buddy

May 18, 2017 | LG 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

LED screen comes on and goes black


LG LCD TV REPAIR - NO PICTURE SCREEN FIX REVIEW ...

? 5:29
https://www.youtube.com/watch?v=PWoz_-3OHIM
Jan 25, 2013 - Uploaded by Tampatec
Common LG LCD TV REPAIR - NO PICTURE OR BLACK SCREEN FIX ... I have a LG 42PM4700-UB plasma tv that justwent black. The red ... I had to keep turning on and off the TVseveral times for the screen to come back.

LCD & LED TV Repair - No Image & Blank Black Screen ...

? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LED & LCD TV How to Diagnose Symptom of No Image on theScreen CLICK ... Tv was working fine when left to go to store and came back to blank picture and ... my samsung tv it turns on but its completely black and no sound at all ... LG LCD TV REPAIR - NO PICTURE SCREEN FIX REVIEW - Duration: ...

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




Dec 09, 2015 | LG 47LS4500

1 Answer

3yrs old LG SMART LED TV 60LS5750-UB. TURN ON THE TV AFTER 3 MINS THE PIC TURN INTO HORIZONTAL BUT HAS A SOUND ON IT. WHAT SEEMS TO BE THE PROBLEM IS THAT T-CON BOARB OR LED DRIVER?


What is the brand name and type of the TV? Without these details, how can one post a solution to your problem? 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.

Aug 20, 2015 | Televison & Video

1 Answer

How do I get the picture back on my LG LED 50 flat screen? Sound works, no picture.


-You have a bad panel. Led arrays internal to the panel are defective. Replacement cost exceeds economical repair.

Apr 27, 2015 | LG Televison & Video

1 Answer

Replace main board on LG 42LC7D-UB


not sure what you're referring to as a "main board", but heres the LCD Control Board for the TV

http://cgi.ebay.com/LG-42LC7D-UB-LCD-CONTROL-BOARD-6870C-0119A_W0QQitemZ150277759127QQcmdZViewItem

Mar 13, 2009 | LG 42LC7D-UB Television

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

64 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

The Knight
The Knight

Level 3 Expert

73619 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18389 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...