Question about LG Computers & Internet

1 Answer

I have a LG 50LN5400-UA tv and the leds will not turn on. The powersupply voltage to the leds drops to 76VDC when powered on.

I have a second powersupply that does the same. Are the powersupplies both bad or is the problem with the leds?I can power the LEDs with a seperate powersupply.

Posted by on

Ad

1 Answer

  • 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
  • 85,223 Answers

The cost to repair is going to be close to the cost of a new TV.

Posted on Dec 02, 2019

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

  • 35 Answers

SOURCE: problem booting

The power supply is your likely culprit. You probably have a bad diode in the power supply. Even if you check the voltages and everything checks out, it still could be bad because voltage checks are done with no load on the power supply. When a diode is bad, a load on the power supply can cause shut down (had the same thing happen to my pc 2 mos ago.) Try a different supply of at least the same wattage rating. If you are still having the same problem, you could be looking at a bad system board. Hope this helps. Good luck.

Posted on Jun 28, 2007

Anonymous

  • 556 Answers

SOURCE: JVC TV- MODEL AV-K21T.

it was not necessry to replace so many parts if you go as per proper procedure.please proceed as 1 isolate horizontal output section from power supply & make power supply ok. 2 if it becomes ok check hor osc,driver&h/output section. 3 if it is ok connect power input to hor.section which was isolated. 4 check for loose contact or print. 5 put on tv .

Posted on Sep 22, 2007

Anonymous

  • 151 Answers

SOURCE: powersupply

first you switch on the supply by shorting (green and black )wire in output socket of smps.then check output voltages.If there is no voltage then check switching transistors or protection transistos that is placed on first hit sink.check primary bridge and capacitors for open.

Posted on May 24, 2008

CAYPIANAN

ESTEBAN MERINO

  • 227 Answers

SOURCE: RECOR COLOR TV dead high pitch whining noise

you have a short in the horizontal ckt,look for diodes,horizontal output it might be damage or a bad cap, if not the fly-back transformer is gone.

good luck


caypianan@yahoo.com

Posted on Oct 27, 2008

Walter H Boehm

  • 998 Answers

SOURCE: will not turn on when

Green LED on back of power supply indicates it's getting power. That does not mean that it's distributing the power voltages to the computer. You could have a bad power supply or a bad motherboard. Just to make surethat nothing else is causing the problem, remove any PCI cards like modem,video card, sound card, etc... Remove the memory modules and disconnect cablesto CD/DVD drives. Look at the USB ports to see if any are damaged.

Posted on Apr 13, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

3 Answers

How do you reset an lg plasma tv model #50PS80-UA


https://www.lg.com/us/support-product/lg-50PS80-UA

Oct 09, 2018 | LG Televison & Video

1 Answer

I have a LG TV, Model #50LN5400-UA , The back light went out a few weeks ago, how do I know which LED Strips need to be replaced? Is it even worth replacing or should I look for a new TV?


Its possible you have lost the voltage that powers the lamps, check that first, voltage on an LG runs about 135 volts per line, if you don't have that unhook the plug going to the lamps and see of you have about 160 volts or higher, if you do then the power supply is most likely ok and you have some shorted lamps and the supply is going into shut down. Sometimes a bad lamp will be dark colored, unfortunately its not a real easy job to get the panel open and get at the lamps, its very easy to damage the panel if extreme care isn't followed.

Nov 13, 2017 | LG Televison & Video

1 Answer

LG 42LN5400-UA.BUSYLHR back lights not working, sound working, flashlight test shows video working.


This is a common problem for LG 42LN5xxx & 47LN5xxx LED TVs, the problem is defective LED back lights strips, it has nothing to do with main power supply & the main board.
dsc03059-mvker0jlcc34dot055xfvek1-4-0.jpg

Aug 31, 2017 | LG Televison & Video

1 Answer

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

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

2 Answers

LED TV pulsing


How many have 'blinking' issue with Samsung led tv - Forums - CNET

www.cnet.com > Forums > Samsung

CNETJan 26, 2011 - I am trying to get the number of people affected by this nagging blinkingissue with the latest Samsung led tv's. If possible it would be useful to ... Samsung LCD TV Screen flickering (LN55C630K1F)
Jun 11, 2015
Samsung LCD TV Has Flickering Horizontal Lines (Pic Inside ...
Jun 11, 2015
DLP Twon't turn on, blinking green lamp light then shuts dow ...
Jun 11, 2015
Samsung LED with flashing standby light on front
Apr 17, 2014
More results from www.cnet.com

EASY How to Fix Samsung LCD TV Flashing Flickering ...

? 3:43
https://www.youtube.com/watch?v=i-jQZ-TQdgU
Jun 4, 2012 - Uploaded by Tampatec
How to Fix Samsung TV Flickering Blinks Flashing Flat Screen Picture ... LED LCD TV FIX, How To For Samsung Double Image, Black Vertical ...

Jan 18, 2016 | LG Televison & Video

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

58 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Computers & Internet Experts

Ekse

Level 3 Expert

13434 Answers

Alun Cox

Level 3 Expert

2679 Answers

Cindy Wells

Level 3 Expert

6069 Answers

Are you a LG Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...