回复：回复：回复：Help Help.. My laptop dying... 蒙古大夫.. dud

Did you read this?
http://www.averatecforums.com/archive/index.php/t-444.html
It seems automatic shutdown is a common problem of this laptop. You may try to remove and then reisntall the ram. Another article on Toshiba has the similar suggestion.
Good luck!