Question about LG Televison & Video

2 Answers

Lg TV 50ln5700 no picture Has audio. Screen flashes LG logo at power-on then goes black. Has menu visible when shining flashlight on screen. Main board replaced - no improvement

Voltages from inverter to backlight 77/18; 77/14

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Habit-Forming:

    Visited the website for 3 consecutive days.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 47 Answers

Unfortunately you have a backlight issue in the panel not caused by the power supply. Replacing the panel will repair the issue but will it will not be economical to do unless it was under warranty.

Posted on Dec 18, 2016

Ad
  • 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
  • 74,251 Answers

Fault at its main digital 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. 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.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.

Posted on Dec 15, 2016

Ad

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

I have an LG 50" Smart LED TV (model # 50LN5700-UH). I have a black screen with sound. The picture flashes up momentarily when it powers on. The back lights flash on momentarily when it powers on. You can...


You are on the right track -led's are pretty durable items and I would try the inverter board first since it supplies the juice for the panels to work and is a source of issues.

Aug 19, 2017 | LG Televison & Video

2 Answers

I have a lg 60 in flat screen smart tv. When powered on, the screen flashes the LG logo then turns black. I can still hear the audio but no video.. any idea how I can fix this.


hi in a dark room shine a flashlight on the screen see if you can still an image if you can, the led or leds has shorted in the panel thanks

shaun

Mar 08, 2017 | LG Televison & Video

2 Answers

Lg 50ln5700 flashes then goes black


Hi Randy,
Since you have replaced all boards and the TV still does not work, The LED's strips have failed and will need to be replaced.
Check the link for more info about how replace the LED strips.

Feb 25, 2017 | LG Televison & Video

1 Answer

Why does our LG 42LE5350-UB tv has sound but no picture ?


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.

Oct 17, 2016 | LG Televison & Video

1 Answer

How do I fix my LG TV?


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.

Mar 13, 2016 | LG Televison & Video

1 Answer

Model 50LN5700-UHBUSYLJR. Why is there sound but no picture??


Chance your led strip if you are sure that your power supply led module is working perfectly

Jul 20, 2015 | LG Televison & Video

1 Answer

No picture


Sounds like you have a backlight problem. To verify this, turn on the set, dim the lights in the room, and shine a bright flashlight on the screen. If you see a faint picture you have a backlight fault. It could be as simple as a bad capacitor in the power supply, or a faulty inverter board, or in rare cases a bad backlamp.

May 04, 2013 | LG 32LD350 32 in. LCD TV

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

Related Topics:

33 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

74251 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18394 Answers

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

Answer questions

Manuals & User Guides

Loading...