I have an Ibook G4 with the Mac OSX 10.4.2 OS. Just today, the bottom of my screen began to duplicate and has several white and black horizontal lines, almost like a ghosting effect. I tried rebooting, taking the battery out, but it is still there. All of my programs are running like normal, but the problem makes it so I can't scroll to the bottom of anything. Can anybody point me in the right direction?