The Internet abounds with many “Do It Yourself” materials for data recovery from damaged hard drives. These methods often confuse drive owners, and most of them are based on data recovery myths.
These so-called methods will not damage a drive any further only if you are fortunate enough. But if you are not, the result can be fatal for the device and eventually for your data.
The black magnetic dust on the recirculation filter obviously hints that someone was not that lucky. Read-write heads are also a great indicator of an unprofessional approach.