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Hello i have a LG 50 inch 50LN5400-UA With audio and no picture .I did the backlight test in the dark and only have 1 red light but when i hit the power button all the backlights flash on then go dark

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Posted on Jan 02, 2017

gopakumarg43
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SOURCE: LG 50la6970 no backlight i have sound and dark images!

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 Oct 08, 2016

AJIN G
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SOURCE: Tv has sound no picture.when you point a flash light at screen you can see picture I think it's a led driver board that needs to be replaced LG 50 inch tv 50LN5400-UA ????

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 01, 2016

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My LG 50LN5400-UA.When I turn it on there is a flash, then the screen goes dark. The sound works.With a flashlight u can see the picture. I can't see any backlights.I replaced the powerboard.


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/
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.

Apr 12, 2017 | LG 50LN5400 50" LED TV 1920x1080, 120 Hz,...

1 Answer

Tv has sound no picture.when you point a flash light at screen you can see picture I think it's a led driver board that needs to be replaced LG 50 inch tv 50LN5400-UA ????


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...

Nov 30, 2016 | LG Televison & Video

3 Answers

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!

Oct 31, 2016 | LG 50 Inch LED TV 50LN5200 LN5200 Series...

1 Answer

I have a lg led tv model 50ln5400-ua no picture but sound on. Before it died it had a little darkness spot in the screen.


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. Surf the site with patience. 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. ..

May 09, 2016 | LG 50" 5400 Series LED HDTV - 50LN5400

1 Answer

I have no light on my led tv


The most likely problem is the Backlight Inverter. It supplies the power to the LED array which illuminates the screen. If you are brave and also technically able, it can be replaced at home. Here is a video to help. LCD TV Repair Tutorial How to Replace the Backlight Inverter Board in LG...

Oct 27, 2015 | LG 50" 5400 Series LED HDTV - 50LN5400

2 Answers

Contrast really dark but seems to improve after the tv has been on several hours


Hi:
You may have a problem with the inverters in the unit, they are responsible for lighting up the back panel. Check or have checked the power supply voltage to the inverters, should be around 18-24 volts DC. Also leaky capacitors on the power supply will cause this issue as well as leaky or puffy capacitors on the inverter.

Sep 08, 2011 | LG 32LG30 32 in. LCD HDTV

2 Answers

Lg mod 26lg30-ua picture is too dark and brightness adjustmen does not help


I suspect that you have a backlight issue. The backlight is not getting sufficient voltage usually due to a malfunction of the 12V line on the power supply board of the tv or a faulty backlight inverter board. This issue cannot be narrowed down any further without testing it. So if you are handy at fixing electronics stuff and know how to use a multimeter then let me know and I will guide you.

Apr 04, 2011 | Televison & Video

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