i need some help and i'm afraid that something really bad has happened to my macbook. it was running fine today (it's been on for a week straight with lots of windows open) then bam, it restarted with no reason why. then i get random restarts all of a sudden, like if the battery died. and now the fan is running loudly all the time, even when it starts up, and everything is slower to load now than it was before. worse, it doesn't even notice my battery and istat pro doesn't know of any fans working at all. i'm afraid that i have a logic board failure and it's out of warranty (and i'm so stupid, i'm crying over it). any other ideas of what i can do before i have to pay the dreaded fee for a new logic board? thanks.