Question about Televison & Video

2 Answers

If one of my led backlights goes bad will it cause them all not to work? My tv passes the flashlight test and I changed my power board that has the led driver on.The screen just went black one night.

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Habit-Forming:

    Visited the website for 3 consecutive days.

  • Televison & ... Expert
  • 198 Answers

The problem is not the LED driver board, ii is bad LED diode(s) on the LED back lights strips.

Posted on May 04, 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.

  • Televison & ... Master
  • 75,822 Answers

Have you tried disconnecting all the boards and reconnecting them a few times.

Posted on May 03, 2017

6 Suggested Answers

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

gopakumarg43
  • 74136 Answers

SOURCE: lg led tv backlight

Fault with its main 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.

Posted on Feb 05, 2015

gopakumarg43
  • 74136 Answers

SOURCE: 47' (sic) LED TV, model number m470vse. Why doesn't the backlight work?

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/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should trouble shoot. Contact any service technician. The circuit will differ with models and versions.

Posted on May 30, 2015

  • 75 Answers

SOURCE: How do I determine if it's the LED Driver or the LED lights that are bad on my LG LED TV?

If it was the LEDs, then you should still have some working. My first thought would be the LED driver circuits.

Best of luck.

Posted on Feb 23, 2016

  • 1680 Answers

SOURCE: When testin a power supply or led board on tv do i test dc or ac with multimeter?

Your power supply board is working if you get audio and imgaes.

You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.

did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Posted on Mar 23, 2016

  • 9587 Answers

SOURCE: Samsung TV

If you see a picture with the flashlight you can rule out the T-Con board. It's working. So the led driver board is the problem. TV Parts Universal TV Stands DLP Chips ShopJimmy Go here for replacement parts.

Posted on Aug 07, 2016

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 a 47" Philips LCD TV Oct 2008 Model # 47PFL3603D/F7 When I turn it on, it works fine for about an hour or so. Then the screen goes black, not a fade right to black. Sound is still on.


The backlight inverter is built into the power supply of this unit. When it fades to black screen, do you see any backlight at all?
If you do see some light, you have a 'blank screen' problem and the backlight is not the cause. Since you can still hear sound and can control the tv otherwise, the problem is likely in the TCON board.
If there is no light coming out, perform a flashlight test (search YouTube for details on this). If you pass the flashlight test, then try replacing the power supply board.

May 24, 2017 | Philips Televison & Video

2 Answers

I have a Vizio E550i-B2 and the screen went blank, I do still have sound. I did the flashlight test and I can see the screen very dim. Would this be the LED driver board or power supply board?


Hi,
This model develops bad solder joints on the connector between the power supply and the led driver board and loses backlighting. It's hard to believe, but the whole connection goes bad. All those pins supply only 24v and gnd. Resolder all of the pins on the power supply half of the connector and the tv will work.
It's the connector between that large yellow board (p/s) and the center green board (led driver).


5_8_2017_3_54_57_pm-4geh5w0df5ixw3m0y3nq5uyg-2-0.jpg

Apr 16, 2017 | Vizio Televison & Video

2 Answers

My element tv has no picture. (it can be seen with flashlight test) will a power supply repair kit fix this issue?


This is usually not the power board. the LED strips fail and you have 55 LED bulbs in the back light. It is not an easy fix because the display is glued to the bezel and if you don't take extreme care when working on it, you crack the LCD display.

Jan 19, 2017 | Element Televison & Video

1 Answer

Samsung UN40F6300 tv has no backlight. Passes flashlight test. already replaced main power supply board. Is there something I am missing?


Some time the LED back lights can become faulty. If o you have to replace the panel. Because the LED back lights comes along with the panel.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

Jun 15, 2016 | Samsung 6300 Series UN40F6300 40" LED...

1 Answer

When testin a power supply or led board on tv do i test dc or ac with multimeter?


Your power supply board is working if you get audio and imgaes.

You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.

did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Mar 23, 2016 | Televison & Video

1 Answer

Can you tell if LED tv has bad LED strips before changing LED Board/Power Supply (as they're in one piece on a lot of TVs)?


This is not easy to diagnose, either use a meter on the power cable to the led or check the leds one at a time

Feb 24, 2016 | LG 47LN5400 47" LED TV 1920x1080, 120 Hz....

1 Answer

LED TV - replaced power board but still no backlight? LED backlights do not seem to work.


yes the led backlight for whatever reason is not functioning and that is the root cause of your problem. Unfortunately to find a replacement led backlight is tough as the backlight is normally fixed with the lcd panel and has to match the voltage and all that stuff with motherboard. and if that doesn't match you might short the tv itself. this case is as good as getting a replacement lcd panel.

Feb 17, 2016 | Seiki SE50FY10 50-Inch 1080p 60Hz LED HDTV...

1 Answer

Samsung LED TV (UN39FH5000FXZA) has audio, but does not have backlight. I replaced the power supply/ LED board with no success, could this be caused by the main board or the t-con board?


Hi Matt,
The fault lies with the backlight LEDs. It is common with these sets. If you open the panel and replace the failed LEDs, or replace the panei.
Good luck.

Dec 05, 2015 | Samsung 5000 Series UN39FH5000 39" LED TV...

2 Answers

LG 50ln5200-ub led TV . Has no picture but great sound . What is the problem ? I did the flashlight test and can see the faint picture which tells me the backlighting is out . This tv model is a Black...


usually bad power supply, Where did you source your part? return/exchange it. Bad LEDs/ possible but not as likely, Tcon working if you can see images with flashlight. You must also have backlight on signal from main board ,check for 3 to 5v on labeled connecter on power supply. UPDATE---47" & 50" LN series. This model has had LED problems if your TV acts as described by Mr. Hughes in is answer to this problem you have bad LEDs

Feb 16, 2015 | LG 50 Inch LED TV 50LN5200 LN5200 Series...

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

Related Topics:

27 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74136 Answers

Cindy Wells

Level 3 Expert

5103 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

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

Answer questions

Manuals & User Guides

Loading...