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

Open Question

Flashing display. I have a LG 47LN5400-UA.BUSQLJR new LEDs and tv works great, but i seeing a flash on the screen . I see no defective Caps or over heated parts on none of the boards.

Posted by on

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Anonymous

  • 99 Answers

SOURCE: 24000 BTUs LG split air conditioner external unit

Hi; Look into Your owners manual for troubleshooting codes. If You dont have a manual call or google the manufacturer...alpharome416

Posted on Jan 22, 2010

Ad

Adam Fridenburg

  • 87 Answers

SOURCE: I have an LG Flatron ez T713SH crt monitor. The

A flashing light, with a black screen usually indicates one of about 4 things;

1) The videocard is not functioning correctly, or the cable is plugged into the secondary output on the card (if it has multiple).
2) The cable has become loose, damaged or completely disconnected
3) The monitor has died.
4) Your computer is not starting properly, causing a blank screen

Solution:
1) Check the cable's connection on both ends, and inspect for any damage (kinks or tears etc.)

2) Take the monitor over to another machine and see a picture comes up. If it does, it's time to suspect the videocard, if not, the monitor is to blame.

3) If you're at this step, it's because the monitor works and the videocard most likely does not.
If you have a standalone card, try;
a) removing it
b) cleaning the gold leads with a white eraser and re-inserting it.
If you do not have a standalone card, or know what that is, move on to the next step.

4) If you're suspecting the videocard, standalone or not, it's time to;
a) remove the RAM from the computer
b) clean the gold leads with a white eraser until it shines and re-insert it
I suggest this because a defective RAM stick can cause a computer to fail to boot. You can also try unplugging all other peripherals, such as the DVD drive and hard drive to see if either of those are causing the computer to fail to boot. Obviously, without the hard drive, Windows won't run, but you'll have discovered that the issue could actually be with the hard drive (however it's unlikely).

5) If none of this worked, try turning the computer on without the RAM in. if there is no beep, your motherboard might have bit the dust.

Lastly, if you're uncomfortable with doing some of the more rigorous/complicated testing, please take the machine in to a professional.

Posted on Jul 01, 2010

gopakumarg43

The Knight

  • 76177 Answers

SOURCE: How do i fix it

The logic board is faulty. That chip can't be replaced by normal soldering techniques. Replace the board. If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Jul 11, 2015

gopakumarg43

The Knight

  • 76177 Answers

SOURCE: I have a LG tv model number 47LN5400-UA. I have sound but no picture. Every once in awhile the picture will flash on then back off. If I hold a flashlight to the screen I can see some of the picture

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://electro-medical.blogspot.com/
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.

Posted on Jan 14, 2016

Ravi

  • 1682 Answers

SOURCE: LG tv (50ln5100) screen went dark. Could still hear the audio. When turning off, can see what's on the screen. Not sure if it's just the tcon board or board and the leds. Any suggestions?

You need to verify the back light if working fine

Posted on Oct 19, 2016

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

What causes my LG 55LS4600 55" tv to have sound but no picture.


It is a common problem for the LG model. The problem
is defective LED back lights ASSY. You have to open the display panel & replace the burned LED strips.

Jan 13, 2018 | LG Televison & Video

1 Answer

Lg tv blink codes


Take the screen off connect power and watch LEDs if any don't flash its LEDs only needed to change faulty strip if they all flash its probably t con boards.

Oct 28, 2017 | LG Televison & Video

1 Answer

I have a LG TV Model number 47LN5400-UA. I turn on the TV and there is audio but the screen is black. If you look closely you can barely see the image. What part do I need to fix it?


It is your back light or the power to the back light that needs to be changed as to how much and how easy it is to change will depend on if you do it yourself or have a TV repair person do it.

Apr 12, 2017 | 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

How do i remove the screen from my lg 47" tv to replace the leds?


If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Disassemble & reassemble procedure to many popular brand TVs and other devices are given in detail with illustrations.

Sep 10, 2016 | LG 47LN5400 47" LED TV 1920x1080, 120 Hz....

1 Answer

My LG 47LN5400-UA flatscreen has a black screen, everything works fine except black screen, when I shine flashlight on screen I can see full color picture, I have replaced the power supply/LED board.


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

Mar 14, 2016 | LG 47LN5400 47" LED TV 1920x1080, 120 Hz....

1 Answer

LG 47LN5400-UA has sound but no picture. Could it be the T-Con board?


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/
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.

Feb 08, 2016 | LG 47LC7DF 47 in. LCD HDTV

1 Answer

I have a LG tv model number 47LN5400-UA. I have sound but no picture. Every once in awhile the picture will flash on then back off. If I hold a flashlight to the screen I can see some of the picture


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://electro-medical.blogspot.com/
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.

Jan 14, 2016 | LG Televison & Video

1 Answer

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/

Aug 26, 2015 | LG 47" 5400 Series LED HDTV - 47LN5400

1 Answer

Orange bars flashing around the screen


This is a link for repairing the power supply board of a LG 42PG20, which also contains a link to an article on how to test the board's functionality, which is actually fairly simple:
http://www.coppelltvrepair.com/p/716/lg-42pg20-ua-power-supply-board-repair-service

May 16, 2013 | LG 42PG20 42 in. Plasma HDTV

Not finding what you are looking for?

Open Questions:

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

Related Topics:

47 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Ekse

Level 3 Expert

13434 Answers

The Knight
The Knight

Level 3 Expert

76177 Answers

RONALD CARTER JR

Level 3 Expert

438 Answers

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

Answer questions

Manuals & User Guides

Loading...