GUTTED for you all with problems with your TV!!!!
Same thing happend to mine last week, 45xx.
Would happend from a cold start and the only way I could clear the screen was to apply a slight twist to either side of the TV.
Mine was bought October 08 from John Lewis so had the 5 year warranty.
I rung up JL on friday, and saturday got a call saying Hertford TV service would come out on Tuesday to repair my TV.
Sure enough, guy come out and had no intention to fix TV but to take it away :-(
My TV was wall mounted and had no stand, so it was just whipped off the wall, no stand, no box and plonked in the back of the guys van and off went my TV. Oh he left me a little TV as a loan TV.
Couple of things worry me. 1 is cosmetic damage to my TV

and 2 the TV seems to be a known Lemon so what do you think will happen? Will it get fixed or replaced?
Does anyone have experience with Hertford TV service and John Lewis?
I bought from JL in the hope that you get looked after. Guess ill find out soon!