Where can I fix my friend's stereo if it is broken?

Any mobile phone repair shop will do. According to relevant information, the machine repair shop can basically repair the Bluetooth speaker of Youyuan. You can also go to 3c shop for repair. Youyuan Bluetooth audio can be repaired in most electrical repair shops. If it is still under warranty, it can be sent to the place of purchase, and it is best to return to the factory for maintenance.