How do I fix vertical colored lines?

My Vizio E65-E1 TV recently developed colored vertical lines that cover the entire TV. The sound still works, and the lines change colors when I switch sources or turn on the menu.

I replaced the t-con board, and the only difference is the lines went away and the screen is black. The screen lights up and plays sound, but does not display any picture.

Is there any other repair methods I should try?

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