Not sure if this is the right forum but wondered if there were any tv engineers out there?
Out 3 year old tv has developed a kind of dark 'misty' mark on the screen. It seems to be spreading from the corner and covers maybe 1/6 of the screen. It's sometimes more noticeable than other times.
Anyone know what could be causing it and whether there's any solution other than a new tv (though I suspect not).
Thanks