I bought an iBook G4/1Ghz for $80 as a fixer-upper / Christmas gift. Alls it needed was RAM so I threw in 1GB of memory. I go to install 10.4 and after installing from Disc 1 it reboots and hangs indefinitely at the Apple logo. I then installed 10.5, and after a complete and successful install it again hangs at the Apple logo after boot. Whats the dealio here?