Contribution d'origine par : Bernie ,
Well, I did boot up my powerbook in target mode, connected it by firewire cable to the iBook, power up the iBook and immediately pressed <option> key. Shortly, the ibook screen showed the 2 bootable OS'es. I chose the powerbook hard drive, but there's no change. The iBook screen still goes dark and the machine goes into hibernation. Looks like it's really a logicboard problem.