Hello I have a Sony Bravia 40inch LCD, which is little more than a couple of years old.  Now when I switch it on there is a dark shadow on the left of the screen which pretty much obscures the whole picture on that side.  There is also a horizontal line that is two thirds of the way up the screen.  After the TV has been on for 5 minutes or so the shadow flickers and reduces size just taking up the middle of the screen, before eventually disappearing altogether.  Then we are able to watch it, but I'm concerned that the problem will just get worse until it's unwatchable?  Any ideas would be greatly appreciated?

Unfortunately, I can't find the receipt and I'm not sure where I bought the TV, I know that it was online.  No doubt it is out of warranty, but surely Sony have some responsibility to ensure that built in obsolescence doesn't kick in until at least 5 years?

Thanks in advance