Possible Duplicate:
Start Macbook with lid closed
Is there a way to power on a MacBook pro via a USB keyboard or mouse, similar to waking it from sleep?
Possible Duplicate:
Start Macbook with lid closed
Is there a way to power on a MacBook pro via a USB keyboard or mouse, similar to waking it from sleep?
As long as the machine is in clamshell mode (with display and power connected), a USB keyboard or mouse will wake it. Otherwise, @SimonSheehan is correct - USB will be powered down.