Sony Bravia vertical stripes (photo included)

Agree. The key is the Sale Of Goods stuff you were given a link to earlier. The key is whether the product has lasted a reasonable time. There's no hard and fast rule for that, so include a photo when you contact amazon and explain that this shouldn't be happening after two years and you require a repair or replacement. If they refuse threaten them with a Small Claim. Personally, I think utter destruction of a TV like we can see on your photo definitely should not be happening after two years. 

I agree fully with Ben, very helpful.

He's not so good with freeview channel advice though.