There may be many reasons why the winding on the hand-cranked music box does not sound. The following are some common reasons:

1. The winding is not fully wound or is wound too loosely. If the spring is not fully wound or is wound too loosely, the music box will not work properly. You can try winding the spring a little tighter and see if that works.

2. The music box movement is damaged. If the music box movement is damaged, then it will not work properly. In this case, you will need to take the music box to a professional repair shop for repair.