Question about Vizio Televison & Video
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.
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 Sep 26, 2016
Hey Matt, It was nice speaking with you on 6YA. If I can be of anymore help feel free to ask. Several other forums I browsed recommend replacing both the LED Driver and the Power Board at the same time and several say one at a time is fine. Replace the LED Driver board then go from there.
If you need further help, reach me via phone at https://www.6ya.com/expert/steven_a67ead41eb5fc62a
Posted on Jan 26, 2017
SOURCE: 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?
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).
Posted on May 12, 2017
Your TV has a backlight fault and needs the backlighting either repaired or replaced.
Posted on Sep 08, 2018
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