I have a Titanium 800mhz Powerbook. I am able to boot from external drives fine (os 9 on an external usb drive and target firewire booting my leopard powerbook) as well as the internal combo drive. I cannot however boot from the internal harddrive. The drive is known to be good. It will boot in a USB enclosure to OS 9 but I don't even hear it spinning up when booting it internally. I purchased a replacement cable from pbparts.com (took him 3 tries to send the right one) and it will not work. I tried apple hardware test, no errors. Any ideas or is this thing toast?