My TV Doesn't have any picture???

Question

Hi there,
We have only had the TV now just short of 2 years. We were sitting there watching it and the screen went blank. It has a slight faint line across the middle of the screen. I have tried it in other TV points and still it doesn't work. We have had this problem once before about 1 week after our 12 months guarantee it did the same thing. We got someone to repair it and 8 months later it has happened again.

Please advise.
I dont know what any of the numbers meam so I hope something makes sense to you?

Sharon