In a message dated 3/16/12 8:07:37 AM, josh.w.richards at gmail.com writes: > Sounds more like your fan is dead and it's overheating. My Macbook did > the same thing. > If the machine runs longest when it hasn't been used in awhile, and the shutdowns occur more frequently/sooner after the 1st one, then I would also agree with overheating as a possible cause. However, since the orig. poster said: " I have to start it up again sometimes it will keep going, other times it will stop/turns off" that makes me think that if it stays on indefinitely after a restart -- when one of these shut-offs happens -- then it may not be a heat issue (or may be a sporadic fan malfunction). Craig W. The Texas’Dawg, COC Enterprises PC/Mac Computer Repair, Network Solutions, Drive Recoveries & Virus Elimination Specializing in Legal IT Needs (678) 773-4062 GA (713) 294-3504 TX (904) 607-1224 FL -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listserver.themacintoshguy.com/pipermail/ibook/attachments/20120316/6d1b18b0/attachment.htm>