Powering on without presing power button?

Hi,
On my old G5 tower with an old ADC Cinema display, the G5 was hidden under the desk and I used the power button on the monitor to power on the Mac.
Same monitor, Apple ADC-DVI adapter, Mac pro. No good - not working!
So, is there any way I an either get this working, OR is there any other way I can get a way of powering up my Mac Pro via some other route that doesn't involve reaching uncomfortably wawy under my desk and flailing about trying to feel for the power button?
Thanks,
Dom

I would probably move it from under the desk unless it gets good ventilation, doesn't pull in dust, and exhaust has some place to go.
All the new Apple CinemaHD will do is turn display on/off or sleep/wake the system.
Never power off and set it to auto boot at 8 AM?

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