The screen is green and pink, and you can see some images and hear sound.

More information would be useful.

The screen is fleuro green and pink. There is sound still and you can vagely see images, I tried playing a dvd through it and picture was fine but TV on its own is the problem, we have sky and tried taken out card etc but no change, any ideas

If using component, verify red, blue and green cables.

Is there something on the TV that can just be reset or does this sound like a major fault

How does the menu look, have you tried a different input?
More info would be useful, TV, Model, what you have tried?