I have a Mac Pro tower, a couple years old now, that is having trouble rebooting. On a consistent basis after the OS has shut down and the machine is restarting I get the familiar beep tone, but nothing more. Then, I can hear something clicking inside the tower which sounds like it's coming from the DVD reader (which is empty). I have to hold down the power button to shut everything down, at which point I can turn the computer on again no problem.
Has anyone seen this kind of behavior before? Any tips/tricks on how to resolve it?
