lost picture?

Hi,
I have a Baird cn55bair LCD TV, and the picture is almost non existent, and the small bits of picture you can see, is very pixelated, and very annoying.
There is nothing wrong with sound, its fine, just picture has stopped showing. Have tried with DVD and other input device, all the same.
Would be obliged if you could tell me if it is possible to repair, and if so, what would I need.
Many regards