The worst I'd see is the need to boot the OS DVD and start over. But drives are pretty cheap so why do this?
I have two very old Powerbook G4s, Aluminium, not titanium. One is 12" and one 15".
The 15" has a dead hard drive. What would happen if I took the hard drive from the 12" and moved it to the larger) and slightly newer) 15"?
I'd be confident doing this on a Windows/ Intel laptop - but have no idea how a Mac would respond.
Any comments, suggestions or pointers to resources would be much appreciated.