Ephemeral_Caesar

https://preview.redd.it/0wrpok89wlqg1.png?width=1215&format=png&auto=webp&s=521d5f8fc88a6b517b45313d982f701e69615070

So I got this new Wega TV that I always wanted to buy for my consoles, but after a while i spotted this black bar that sometimes appears on the side of my TV. Its not always visible, but on some colors it likes to pop out. Any idea what is the cause of this and could I fix it on my own?