Black and white screen?

I've got a dvd player that I've not used for a while. I connected it up the other day and the welcome screen is in black and white and it stays that way even when you play a film. I've not touched it for ages and it used to work just fine.
Why has this happened and can I fix it??
I've tried new scart leads, and different t.v.'s too, but it still does the same thing.