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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?

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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).


I have a Vizio E550i-B2 and the screen went blank, - 5_8_2017_3_54_57_pm-4geh5w0df5ixw3m0y3nq5uyg-2-0.jpg

Posted on May 12, 2017

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  • Vizio Master
  • 12,962 Answers

Led driver board.

Posted on Apr 16, 2017

  • Joe Billings Apr 16, 2017

    Thanks. Is there anyway the power board could not be supplying enough power to the LED driver?

  • richie46 Apr 16, 2017

    Yes, since the power supply is equivalent to the carb on an engine and supplies all electrical needs to the various boards. I suggested the led driver board because it is the only board that appears to be affected. The other boards seem to be working fine so they are getting power and not displaying any issues.

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Posted on Jan 02, 2017

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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

  • 681 Answers

SOURCE: I have a Vizio E550i-b2 55 LED TV. I have no LED backlight. When I hold a flashlight to the screen I can see the images and I have sound. I was going to replace the LED driver? Thoughts??

Hi Jimmy,
If I may suggest, before changing, please check that the inverter board is producing the necessary voltage to drive the backlights or not. If the board is producing the necessary power and still the backlight is not coming on, there is possibility that some of the LEDs in the backlight array have failed.

Posted on May 04, 2016

Testimonial: "No matter which HDMI input I use the screen is totally black again. The apple tv works fine on a different Vizio TV with a different HDMI cable."

  • 3 Answers

SOURCE: Vizio E550i-b2 TV has no backlight, pic or sound. Replaced power and Main boards - still having the problem. Any suggestions? I have the TCON and LED Driver board left

The led is what makes the picture try replacing that it it's the only one you didn't change out

Posted on Aug 31, 2016

AJIN G
  • 6694 Answers

SOURCE: Visio E550i-B2 Have sound but no picture. Did a flashlight test and I see an image. Google search results point to bad LED driver but I would like a second opinion. Thanks

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

  • 1525 Answers

SOURCE: ordered Vizio 056.04167.0001 Power Supply / LED Driver for E550I-B2 the sound worked before switching it out, but picture did not. Installed part & picture only stayed on for a few minutes & no sound.

hi the led in the panel may have shorted out thanks

shaun

Posted on Mar 27, 2017

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1 Answer

Good morning. I have a Vizio e550i-b2 with no picture or sound but I did the flashlight test and I can see picture. Any idea what I need to fix my issue. thank you so much


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 them and the tv will work.
It's the connector between that large yellow board (p/s) and the center green board (led driver).

25464bf7-ffef-4ea6-b854-2af6ee4a9464.jpg

May 08, 2017 | Vizio Televison & Video

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I'm trouble shooting my Vizio e550i-2b It has power no backlights, image can be seen with a flashlight, I've replaced led driver board and problem persists, do you suggest main board next?


If you can see an image with a flashlight and you can control the tv with the remote then the main board is not the problem. You've replaced the LED driver board, so that leaves the LED strips inside the LCD panel as the likely problem.

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1 Answer

Vizio e550i-b2


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....

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Fixya does not sell replacement backlights.

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Could be an open internal fuse or power supply failure

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One or more of the LED backlight strips behind the LCD have failed. Difficult and sometimes expensive to fix.

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I have a Vizio E550i-b2 55 LED TV. I have no LED backlight. When I hold a flashlight to the screen I can see the images and I have sound. I was going to replace the LED driver? Thoughts??


U are on the right track - problem is caused by the board that drives the backlighting - the inverter board.

If you can get the number for the board it may be available on the cheap on ebay.

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