I have two external firewire drives, both with Tiger on them; both drives were from other machines. One drive was from a Tibook, now in an external case, the other was the original 20gig iMac g3 drive from my mom's computer. That desktop drive has an external powersource, while the Tibook laptop drive only has the firewire cord. I've got a friends 867mhz 12" PB that I can't get to boot. Grey screen spinning rotating thingie only. i have fsck'ed, pramed, pmu'ed I think. The only interesting thing I got was one long tone when I held down the power button for more than a few seconds. The tone and then the sleep light flashed. Is the logic board gone as well? All I'm getting is the tiger install screen off the two external drives, no actual Tiger start up. What am I doing wrong?