I have an old G5 that I am rebuilding. I am using the Mac OS x v10.2. I bought a brand new apple keyboard but unfortunately the keyboard is not working when I plug it in so I can press and hold "c". I am guessing it isn't working because the keyboard is not loaded onto the computer. The computer comes on to the grey screen with the folder icon with a smiley face and flashes to a "?". Is there ANY WAY I can load the OS to the computer without the keyboard working?