The very first thing you should do before taking an action to recover data from your disk is to protect the disk from further damage. The data is in the disk but it can be lost if you do not take the necessary steps. You should not make any changes to the disk whatsoever. Be careful with how you handle the disk and do not try to open it yourself. A damaged hard disk is very sensitive to changes and it can be hard to troubleshoot. Do not do anything to test.