We've [ShopJimmy.com] found that replacement of the power supply [Vizio E550i-B2] remedies more than 90% of the "TV has sound but no picture". Update: I replaced the power board and it still doesn't show a picture. Just the sound and picture if you shine a flashlight on the screen.
Hello Brian, if you have changed the power supply board and still have no image, then some of the LEDs that are responsible for illuminating the screen are wrong, to solve the problem, you should replace all the LED strips, because if only change the ones that have one or two damaged Leds, the other strips, they could fail you soon and you would have the same problem again
I sent you a video of [ShopJimmy.com] that shows you how to replace the LED strips, in another Vizio TV model of 55 "
I hope you can solve the problem of your TV Vizio
Greetings Franco Dosil
Hola Brian, si has cambiado la placa de la fuente de alimentaci?n y todav?a no tienes imagen, entonces est?n mal algunos de los Leds que se encargan de iluminar la pantalla, para resolver el problema, deber?as reemplazar todas las tiras de Leds, porque si solo cambias las que tengan uno o dos Leds da?ados, las otras tiras, podr?an fallarte pronto y volver?as a tener el mismo problema
Te env?o un v?deo de [ShopJimmy.com] que te muestra como reemplazar las tiras de Leds, en otro modelo de TV Vizio de 55"
Espero puedas resolver el problema de tu TV Vizio
Saludos Franco Dosil
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.
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."
The led is what makes the picture try replacing that it it's the only one you didn't change out
SOURCE: 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://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.
hi the led in the panel may have shorted out thanks
shaun
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).
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