Question about Televison & Video

1 Answer

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

Screen went blank. I have sound and images with flashlight test, no backlights. Now trying to determine it pwer supply / led board is bad or if leds are bad. Thanks

Posted by on

  • jason yates
    jason yates Mar 23, 2016

    I am sorry I should be more spacific...I am testing the led driver. Thanks

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,682 Answers

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

Ad

1 Suggested Answer

6ya6ya
  • 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

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

I have a 32" Samsung LED TV with not picture. Audio is working.


Do flashlight test - if you can see image you need t con board. If no images seen, inverter board. TV Parts Universal TV Stands DLP Chips ShopJimmy

Sep 18, 2017 | Samsung Televison & Video

1 Answer

Samsung UN65EH6000FXZA (Version YH02)


There is three possibilities:
1. Defective back lights LED strip.
2. Defective LED driver section integrated in the main power supply.
3. the main board.

How to check it:
1. You need a LED back lights tester to check the strips, or open the panel, use a 3.7 V DC power supply to test each LED diode separately.
2. Use a multi meter to test the out put DC voltage from the connector to the LED strip between the + & - for each section, (like 1+/1-, 2+/2- etc.) it should read 140 - 220 V DC. (need power up the TV).
3. Un-plug the cable between the main board & the power supply, power up the TV, if you get the back lights light up, the main board is bad.

Aug 11, 2017 | Samsung Televison & Video

3 Answers

I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


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.

Apr 26, 2017 | LG 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

1 Answer

Model SE46FY10. Why does it have sound but no picture?


invariably the LCD backlight inverter board or the LED driver board are the usual suspects. or the T.Con board

see the video below and follow the logic of elimination process
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Mar 22, 2016 | Seiki Televison & Video

1 Answer

Vizio tv has sound no image


If you can see an image on screen via flashlight test then the backlighting is not working. And the inverter board is the unit that powers those lights ..... So....................

Mar 05, 2016 | Vizio Televison & Video

1 Answer

Soniq PT42SH plasma TV power on. No back light and no pictures


SONIQ LCD TV REPAIR Blank flickering screen Energy ...

? 1:32
https://www.youtube.com/watch?v=FUqdi7lwmcE
May 29, 2013 - Uploaded by WastedOne2
Fix ya Soniq Tv once loaded up hit menu button then channel + then ... SONIQ LCD TV REPAIR Blank flickering screen Energy Saving Mode Issue ... Easiest TV repair - How to Fix Power [TV turns off, freezes, or won't turn on] ... Common easy LCD TV fix: bad picture screen rainbow colors - Duration: 4:04.

No Image & Blank Black Screen Flashlight Test - YouTube

? 5:56
https://www.youtube.com/watch?v=xUzCLgoSPGM
Sep 15, 2014 - Uploaded by ShopJimmy.com
LCD & LED TV Repair - No Image & Blank Black ScreenFlashlight Test - How to Fix LCD & LED TVs ... Most LED TVs will have a t-con board, a power supply board, a main board and an LED ..... SONIQ Australia 1,718 views.

Soniq PT42SH plasma TV power on. No back light and no ...




Jan 08, 2016 | Televison & Video

1 Answer

Power indicator on, logo flashes briefly, but then no picture. What's wrong?


SEIKI Tv SC501TS has audio but no video, repair - YouTube

? 1:38
https://www.youtube.com/watch?v=cWpF4q_rBaw
Oct 19, 2014 - Uploaded by EurekaRecycler
SEIKI Tv SC501TS has audio but no video, repair ... LCD & LED TV Repair - No Image & Blank Black Screen Flashlight Test - How to Fix LCD ...

LED TV Repair Main Board Overview Blank Screen-TV Has ...

? 2:57
https://www.youtube.com/watch?v=-TU2KSuect4
Mar 4, 2014 - Uploaded by ShopJimmy.com
Learn why your screen is blank and you have audio - No image LED TV Repair Review Main Board Problems ...

LCD & LED TV Repair - No Image & Blank Black Screen ...





Dec 13, 2015 | SEIKI Digital Seiki SE32HY10 32 720p...

2 Answers

How do I fix my Samsung 40 LED TV that has sound but no picture?


Samsung 60-Inch 1080p 120Hz Slim Smart LED HDTV ...

? 10:42
www.youtube.com/watch?v=hcVhHU322Gk
May 18, 2015 - Uploaded by Thomas M. Landry
samsung un60h6350 60-inch 1080p 120hz smart led tv,samsung... 120hz smart hdtv,slim led tv,65 inch smart tv deals,samsung 40 led 1080p 120hz ... LCD & LED TV Repair - No Image & Blank Black Screen Flashlight Test ...

Oct 15, 2015 | Samsung 40" 1080p 120Hz Slim LED Smart TV...

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

Related Topics:

116 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76140 Answers

Ekse

Level 3 Expert

13434 Answers

Cindy Wells

Level 3 Expert

6026 Answers

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

Answer questions

Manuals & User Guides

Loading...