MacBook Pro Just Shutsdown

Steve, 
I am enjoying my new screen very much. But the computer has been having a problem since I had it done and it is increasing in frequency. It just shuts itself off randomly. When I turn it back on it sometimes does it again. I can't find any similarity of when it happens. not too hot or near end of battery. Any ideas on what is going on? kate

Hi Kate,
I had this issue with mine also, then the fan started making a loud (!!!) noise on startup. It was so loud, I could not hear the TV.! I called Apple and they replaced the entire logic board for free (out of warranty). If you haven’t had yours replaced, call Apple before they stop the “voluntary recall”. Tell them the fan is making a loud sound and wont stop and you’re having this shutdown problem. (it has nothing to do with the LCD replacement.)

Also see:
http://arstechnica.com/apple/news/2006/07/4689.ars

http://www.fixya.com/support/t710869-macbook_pro_just_shuts_down