I might be repeating priors. This is usually one of the parts such as the panel (too expensive to consider repair), a connection for the tech to find, or a board. There's usually only 2 boards in play so you replace the cheapest first.
But this also means there are no user serviceable parts and it's never been a setting.
Also, check warranty period and consider extending it if it's on the edge then waiting 30 days to call it in.
I am having a vertical blue line on my screen. Just started a month ago. By looking at google, this seems to be a common problem. Is there any fix to try?