Hello, today this has happened twice. It has never happened to me previously. My screen has just gone pitch black. The first time I didn't really pay much attention, because it quickly came back on, but this second time I payed attention because it happened again. My mouse cursor was visible, I could see the brightness buttons icon's change when I lowered and raised the brightness. My ipod was plugged in the first time this happened and the second time. It also automatically disconnected both times and once it was disconnected the screen came back on. Any ideas please.