HP510 developing lines randomely running down the screen.

I have an HP510 that started developing lines running down the screen recently. It started as a single line but as time went by the lines started developing on different spots on the screen. right now my screen has got at least 15 lines running down the screen. I cant even see properly some of the text. I have to restore up or down for me to see. This is now becoming a major concern for me cozy i hardly see. Is this a physical damage or its software related? If its physical what component is faulty and how can I replace it?