Chosen Solution
I do see vertical lines on screen(mix of colored lines) majorly on the right side of the TV. when turned on. There are no cracks on the TV screen. Trying to see if there is a way to resolve the issue.
@alle this is a big depends. Depends what those lines look like. So, post some images of what your screen displays with your question. That way we can see what you see. Use this guide Adding images to an existing question for that. Going by your description it does sound like a bad T-con board. Of course a bad panel is always possible as well. Let us know the exact model your TV is.