hi i have a black macbook. and the fans are constantly on. ive quit all apps, shut down, rebooted, still on. i have over 100gb free drive space, 4gb ram 2.4processor. i dont know whats causing this.... does this sound like this mac is dieing? sometimes the screen just goes blank, and permanently goes in sleep mode, have to power off with finger on button. not daily, but has happened regularly. also random files from my desktop got trashed recently, into trash bin. very very very concerning, i found no answers on net apart from keep a tidy desktop. but where does it say in manual that having a messy desktop results in files getting trashed?? folders vanished... not happy. ive backed up my data today, i expect the worst. any advice? thanks.