Hi bit of a problem I have an old 2005-06 Mac Mini running 10.4.11 I use a wireless keyboard and bluetooth and usb mouse and as everyone will know I cant kick in to mac from keyboard until its on which I normally do through holding mouse button it was in middle of installing 10.5 Leopard when I had a brief powercut.When I turned it back on there was no wireless signal from mac neither will any of the usb ports work.I have found article online that says it could be a Firmware Update Issue ?? How can I update the Firmware when I cant boot the Mac ?? Thanks any advice would be appreciated.