I have a Vizio E550i-B2 LED tv that will not power on nor does it have a stand-by light. I have changed the power supply and main board, but still have a dead set. Any ideas would be welcomed!

The Knight

• 76851 Answers
• Posted on Nov 02, 2015

SOURCE: Model e550i-b2. Backlight comes on but why no picture?

T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
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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.

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."

Electro Med Services

• 6694 Answers
• Posted on Jun 11, 2016

SOURCE: 55 Vizio LED e550i-b2. Confirmed no back lights. Unplug for few hours, replug and works again for a few days. Is best bet led invertor going out? Visually the boards and connections look ok.

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.

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