Cannot turn on computer from Cinema Display.  Why not?

I have a G4 and recently bought a new 20" Cinema Display. To hook up I needed an ADC to DVI Adapter. Everything works except:
1) I cannot turn on the computer from the Display. I can only do it from the computer power button, whereas I could with my older Studio Display. Why is this?
2) If I put the computer to sleep, I can't wake it up with the touch of a button on the keyboard. Nor will it wake up by touching the Display power button. Once again it will only wake up if I press the computer power button. Is this normal?
3) If I put the computer to sleep by pressing the Display power button, nothing will wake up the computer. It stays asleep. What the heck is going on here?

You have 14 days from the date of purchase to return your computer with no questions asked.
Why are you wasting time on a message board w/a spanking new Mac?  You should be ON THE PHONE with Apple first thing!

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