Lines and splash of color on monitor

Yeah, that screen has probably pushed in a little bit too hard, probably damaged. Suggest testing it with another external monitor that you can plug into the side of the laptop. Here is a location you can get a replacement screen really cheap. http://www.blisscomputers.net/acer-aspire-4720-101g2-laptop-lcd-screen-14-1-wxga-glossy.aspx