phone's colour faded

[siddharth]

I've been using lumia 710 for last three years and 2-3 days ago , suddenly the screen showed moving lines, and after 2 hiurs its colour faded and the screen turned yellowish, since then its yelliw still.. What to do ? Also, my main phone speaker doesn't weark, like dumb phone.. Really i need help, should i go to nokia care centre?