Can i make an external button to power up the computer using wake up on lan?

With the feature of Wake up on Lan I am assuming that the computer can be shutdown completly but via wake up on Lan?
If this is the case I have my mac pro hidden from sight but obviously need to turn the computer still.
I do not want to use the Sleep modes nor use schedules.
Can I take an ethernet cable and plug something on the end to then power it up? (I don't want to put another computer on the end of that ethernet cable though).
I'm open to suggestions as to how I could make and external power on button. Any USB buttons i could use to power on? Or could I get to the power switch of the mac and connect up another button? Isn't there 2 pins in the machine that an repair agent would use to turn it on without using the button?
Hope i can get a good tidy solution to this.
Many Thanks

You have found the answer. If the video chipset is OK but there is a fault in the internal display or its cabing, an external monitor will work. However, if the video chipset--which is farther "upstream" in the system--goes bad, the option of an external monitor is off the table.

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Can i make an external button to power up the computer using wake up on lan?

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