The circuit which receives signals from our remote doesn't work.
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The circuit inside our Vizio E420-A0 TV, which receives signals from our remote, doesn't work any more. It used to, but it has stopped working.
I know this because neither of our remote controls work and the exterior buttons do work. I have been told this circuit is on the main board. If so, can it be repaired? Do I need to replace the main board or is something else causing the problem? Thank you.