

Lines through my monitor
Hi! I know absolutely nothing about pcs, I bought mine off of my sister, bought my monitor new, this issue started only two months after purchase.
These lines appeared going horizontally across my screen randomly. I don’t move or touch the monitor, so i couldn’t have damaged it by hand. It looks like the monitor still works where the lines are, I can see my mouse inside the lines if I position it correctly. The monitor also has less noticeable lines through the whole thing, like an old tv.
How could i fix this? Do i need a new chord or a new monitor? Or is it just a setting thats screwed up?