Posted 15 April 2008 - 06:28 PM
Im almost positive that theres some bad hardware in that mac. I dont see how it could be software related, cos you can boot off the drive.
Theres 2 things I can think of. One is to try and boot into the Hardware Test disc. This is probably your first install disc. Insert the disc and hold "D" as you boot up.
The only other thing I can think of is to boot into target mode on the bad mac, back up anything you want to save, and try an erase and install via the good mac.