My laptop that was given to me recently (pretty used) is having some unexplainable trouble. Last time I tried to turn it on, it started making an indescribably loud ringing/fire alarm type noise as though it was going to explode. It was a long very loud piercing tone, which would go for about 30-60seconds and then stop only to start again a few seconds later. It only stopped when i got the computer to shut down.
Does that sound like it's the hard drive? or something else? if it is, is it likely to be salvageable? is it really expensive to get a new harddrive? btw, the computer is a dell inspiron notebook (about 3-4 years old). thanks