1. Confirm whether the mobile phone and TV equipment are connected to the same network, and the network connection status of the mobile phone and TV equipment is stable.
2. Try to reopen the music function in HarmonyOS Control Center or restart the application in HarmonyOS Control Center.
3. Make sure whether the right equipment has been selected for the music to be played, such as TV or stereo.
4. confirm whether the music application has been opened, and whether there are proper prompts and displays in the playing state.
5. You can try to update the application of HarmonyOS Control Center, or update the system software and drivers of target devices such as TV.
6. If the problem still exists, you can try to use other music playing applications to test whether the equipment is normal, or contact the application developer or equipment manufacturer of HarmonyOS Control Center for consultation and support.
note that the above suggestions are for reference only, and the specific steps may vary according to the specific situation.