my macbook has been in the process of getting fixed for the random shutdown problem. apparently, it isn't the logic board, it's the heat sync (i think that is what he said) that needs to be replaced. has anyone who has had their logic board replaced once experienced more random shutdowns at all? also, they had to replace my top case because the keyboard and mouse didn't work after replacing the heat sync. anyone know anything about this? Edit - i just read the 16 page thread on this. woopsie.