Sony KV-27S42 27" TV "purple spot right corner" Questions

...purple. When red, this area is blueish. I have checked for any kind of magnetic issues, and even moved the TV, but the issue still exists. What could it be? Unplug the set overnight and plug back in ...

spot for numeric input) After this appeared - the Jumbo NOR the original remote would work. BUT - I pressed the "MENU" button on the set and it brought up purple lettering at the top of the screen for

...purple in the center. If I then change the television to the blue screen, the spot stays, however, it becomes a yellowish-green on the blue backdrop, before slowly fading to a darker blue, then back ...