My Nokia phone is display is white so i havenot see my display

My Nokia phone is N72 . My problem is my phone display is white so i do not see my my display but any call come and go but i do not see why please please give me a solution and i think that virus attacked my nokia phone N72 What will i do please give me a solution one day or two day my mobile display is again and agin surf then white then surf then white ........................ ok sir please give me solution and give me if i scan or forword or formett can to do...... ok bye