Not a victive of the cracked chip, took it all apart. Fan doesn;t go on but once when it first boots, the heat sink is not to hot when it freezes, sat next to a AC (cold) with bottom/top exposed, got a little more time. Took out the RAM and used the onboard, same end result, RAM is fine, HD is fine, something is freezing due to temp. I also tried to install a fan program, for 10.4, and it installed but when I click on it in the system preferences, it won't run, Any ideas what it could be? All chips look fine, especially the known CRACKED issue chip, that is fine, all pins fine. Also noticed that one time, after it was frozen, it moved again for a few minutes. Appreciate advice.