The black mark on my screen moved vertically downward so I'm puzzled, the guy came today with a new panel. I wasn't able to be here when he came so had to get my sister to come over and let him in. I had left him a note saying that the mark as slowly travelled downwards since the fault had occurred. She said he came in, turned TV on, couldn't see a mark but said that it'd probably show up in a few hours. So he replaced the panel anyway... she wasn't in the room to watch as it was a sunny day and went out in the garden.
This sounds messy, If something else break other than the panel in the time I have left on the warranty I have to contact samsung(6 months) I get another years warranty from the company that installed the panel, probably for just the panel.
Wished they had just replaced the TV as now I don't know if they replaced the panel or not!