I have a Powermac G4 800mhz and it will not start up in target disk mode. I have a logitech keyboard that works fine, but when I start it up with ANY key commands it ignors them. The keyboard is USB, plugged directly into the Powermac, no hub. If I hold down the mouse button at start up it will eject disks. I have Tiger on my Firewire hard drive that I want to install on here and I have an iBook that has the Tiger DVD in it, but neither can install Tiger on this powermac. The powermac has no DVD drive. I want to boot this in TDM so that I can install Tiger on it through the ibook. Any recommendations?