My TV had purple in the top and bottom left hand corners about a week ago and the only way I got rid of this was to switch the TV off and on again.
It happened last night again but this time was in all four corners.
Again it went away after switching it off and on a few times.
From searching through the internet I think there is a problem with the degaussing mechanism.
Just wondered whether anyone has had this problem and how was it resolved?
Thanks!