My hard drive suddenly started making a click click noise with intervals of about 3 seconds. When i rebooted it made the same noise. - Now it will not detect the hard drive the main black screen when you turn the computer on. is it a physical error with the hard drive? Being a musican all my years of music is on there, if i dont fix it i will be devestated. I cant reformat obviously, Should i open it up and make sure that everything is in place and operating/moving correctly. Can someone please help me, i would appreciate it so much.