My mointor turned purple
Now this may or may not work for you.
I think I had the same problem today, I just turned on my PC and the letters and startup screens were purple all of the sudden when the day before they were just fine. Well this is what I did to fix it.
Your Monitor should have some buttons below the screen. You want to press the button that says
"Menu". Once on the Menu screen use the up & down buttons on the monitor to scroll through the menus. What you are looking for is a "Reset" option once you find that choose to reset the Monitor and all the colors should go back to normal.
I am sorry if it is hard to understand, I did my best to explain it. I just hope this helps
no model told, no answers.