I know this is titled "Mac Basics and Help", but this Mac user has a mother who uses a crap 1999 Compac Presario 1200 475MHz AMD. The computer frooze when starting up AOL, and holding down on the power on button did not respond. So she unplugged it, plugged it back in, and now the computer will not power on. Is it dead? I am going to try unplugging it, holding down on the power button for 30-40 seconds and trying it. I hope she will buy an iMac!