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V505-J09 Backlight or Board?

I have a Vizio TV that I was working on the sound (optical and eARC) because sound was not working. After a restart the TV came up with black screen but I could see the “new setup” menu using the flashlight method, so for sure the backlight is out. Now then, it is a single main board - TPD.MT5691T.PC763. Should I first go for replacing this board (if so, what online store?) because replacing backlights seems a bit daunting having to pull the whole panel glass, etc.

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@drmdolfan as a rule of thumb it ou "but I could see the “new setup” menu using the flashlight method" then it is usually the backlight. A failed main board will not produce an image. Check the voltages for your backlight LED. If you have about 145-150V you have the right voltages. That means you will have failed backlight strips.

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