My screen got all pixelated on reboot (which takes a very long time suddenly). The items on the dock are invisible but there. When I pull down menus it's all garbled so I can't navigate to a disc repair. All I can do is describe it on my iPad and hope someone can either suggest a fix or even tell me if this is repairable. Either by myself or I have to take it to the apple store. Please advise good people of the macrumors forums. Not sure why the attachment rotated, the image did not my screen.