Can anyone help? I have a Mac os x 10.4, The problem is with my Screen it just randomly goes black whilst I am in the process of typing, working etc is as if the screen is going to sleep (even though not being left for long period of time) but I can't get it to come back on when i move the mouse or press any keys. I then have to shutdown where it then takes about 4 attempts to start up again. This is happening at least 1 an hour daily. If anyone can help I would be very grateful.