powerpoint backgrounds school

powerpoint backgroundJohn.BJan 19, 09:41 AMIf I shine a bright light on the screen, I can see what is going on. Actually, I just know that pressing the power button and then the 'S' button puts a Mac to sleep. I then just let it sit for like 20 seconds, hit the space bar and it woke with the screen lit up. I don't know that this method works every time. Sometimes I need to reboot the Mac.