............ Update ................

Just done another test on the TV - leaving it on...

after 30 minutes the TV has lost its colour, gone dark and has red and
blue lines running across it, horizontally
http://www.alienmoons.com/public/images/ferguson.jpg

40 mins and the colour is still gone, but the lines have gone - so it
is like a B&W TV.

50 mins the TV switched itself to standby mode, so I turned it on
again to find the picture is perfect.

after 5 mins from switching it on again there is a red bar at the top
8th of the screen.

10 mins and the bar has gone, and saturation has gone down to about
50%

15 mins, the red and blue bars are back, and the sound has gone.
picture is wobbling side to side quickly.

Again, any ideas?

Thanks. Demon.