It all since yesterday night after Installed the EFI firmware and itune 8.01 updates, my MBP fall in problem of unable to come back from sleep. The Fan is running but all screen gone black just as if the brightness switched off completely. Still can see slightly the log-in window in almost black screen. After input password the screen goes black finally. Forced to switch off the by pressing the power button.Does anyone know what's wrong for the problem? My MBP, Rev. D, 2.2Ghz, 4GB, 320GB, 10.5.5 Leopard.