Can hear sound, but it’s like a real dark purple screen

I have the same problem with my vizio m50-c1. It turns on, I can hear sound, but it’s like a real dark purple screen. I can see little pixels in the corner. No the TVs was not hit, it happened while I was watching it. I unplugged and went to turn it back on and it appeared there, looks kind of like a burn?

If you can see in the picture here