Different Colors are displaying in the backgr

Hello,

i am using acer netbook 532h.my net book is working fine .today when i switch on my netbook,everything gng good,but the background in my monitor different colors are displaying(when we press a LCD screen,how colors will be displayed,like that they are displaying)i tried different options by changing the graphic options,resolution.but nothing works for me.In the background different colors are displaying.i dont know what to do.please help me,what is the problem,i am facing?