Electric neck massager repair

Описание: A friend brought me a broken electric neck massager.
He told me, "The gears might be broken."
I took it apart to see if I could recycle the lithium battery. Then, I could recycle the rest for parts.
However, rather than recycle it for parts, I decided to find the broken part and repair it.
After disassembling it and checking its operation, I discovered the cause of the problem: the screw connecting the drive unit had come loose. I had thought it was too difficult, but it was a surprisingly easy fix. I laughed out loud.