Hey guys, I'm trying to watch a DVD, but the screen keeps going to sleep. I've watched DVD's heaps on my 24 inch iMac, but I've never had this problem until today. I am in full screen mode and obviously not moving the mouse/pressing keys frequently. The sleep time is the same as in the System Preferences (for the whole computer) I set that back to default and still have the same problem. I have not touched the settings for DVD player ever but I had a look through them and saw nothing related to the screen going to sleep. It seems that the computer no longer recognises DVD player as a program that it should not black the screen out for. Any suggestions of what I could do to resolve this problem. Could have it been caused by a software update? This is the first time I've watched a DVD in a while.