USB: Keyboard Should Not Be Plugged Into USB Hub

If a Universal Serial Bus (USB) keyboard is plugged into a self-powered USB hub, pressing the keyboard's Power key does not start up the computer. However, if the keyboard is plugged into the computer the Power key works.
This behavior is normal as most USB hubs do not become active until they receive a signal from the computer.

If the computer will not power on with the keyboard plugged into a hub, you must either use the power button on the front of the computer or plug the USB keyboard directly into the computer.

Note: On USB equipped PowerBooks in closed clamshell mode, the power on button is not accessible.
Published Date: Feb 20, 2012