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??
Televison & Video - Vizio - E550i-B2 55" LED TV 1920x1080, 120 Hz, HDTV
Answers & Comments
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.
Is the screen black even after removing the HDMI cord?. If the TV is back to normal after removing The HDMI cable, the source is causing the problem. Please try another input ie. AV cords.
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."
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.
On your set the led driver is the equivalent of the inverter board. Replacing that board should do it.