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How do I diagnose which board I need for 4k TV that powers on but the screen is black?

Vizio v585-h11 2 years old Picked up secondhand Tried the different reset procedures recommended on Vizio's website, to no avail. You can see it turn on in, the screen does change slightly.

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Paul Bade

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  • Vizio Master
  • 1,744 Answers

With the TV turned on, press the menu button and shine a bright flashlight on the screen at a shallow angle (about 20° from parallel to the screen). Move it around - if you can see the menu or other material where the flashlight is pointing, you have a backlight failure. This may be either in the power supply, or the backlight itself (sadly, with LED backlights, it's usually a blown LED).

Posted on Nov 28, 2022

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How can I diagnose a Vizio TV failure?

It is good spec, and 4K so this Vizo is probably worth fixing, most aren't, they are a cheap brand..

https://www.google.com/search?q=V585-H11

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Take it in for repair or try and claim on the 3 year or 1 year warranty. They are a budget brand.

3 year warranty

https://www.vizio.com/en/three-year-warranty-policy

1 year warranty.

https://www.vizio.com/en/terms/warranty-and-returns

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It can only be a bad connection or one of the 'new' boards you put in was faulty. Start swapping back the old boards one at a time. Make sure any ribbon cables are properly seated.

This Tip I wrote a while back explains the problems you face.

https://www.fixya.com/support/r29790007-repairing_own_television

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Sounds like a bad power supply. I have a GV42L 42" manufactured in march 2007. It works perfect except the screen has a fracture on it. The warranty is voided because we damaged the screen. I can sell this to somone who has a good screen but needs boards or speakers, etc. Or I will buy your tv that has a good screen but damaged boards in it.
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