According to my lil bro, the computer landed screen down. Now whenever he tries booting his Mac, a folder icon appears on the screen and the HDD makes a continuous skipping noise. I'm guessing a new HDD will fix the problem?
hopefully the hard-drive has just worked loose open it up and try to reconnect it.. if it still doesn't boot the hard-drive could be goosed..(broken) It needs to be replaced if it is. you may want to search data recovery people/companies to try and retrieve any lost data if u need it but it does cost loads..