Bloody thing has gone wrong again

Only this time, it won't stay on more than a few mins before the picture goes. And can't even report it faulty until Tuesday as Samsung service closed until then (and place I bought from won't deal in any way shape or form, claiming, wrongly, that the warranty is with Samsung).
Added to that, I know Samsung's local repairer in Banbury do not hold any M87 parts in stock, so that will be another 2 weeks

.
PSU aside, this set only has 2 component parts, and the main board has already been changed, so I guess they will try the panel itself next.
Last 3 TVs I've had have all caused me nothing but grief - the Sony, well, enough said. Piece of shit Sony junk. The Dell, and excellent little set let down by poor DTV software causing the DTV tuner to not always initialise. The Samsung, brilliant set, but failed twice now in 5 months.