Does the subject want to ask "What are the common sound faults of Tianjin Huaning centralized control?" There is no sound or noise interference.

1. No sound: due to incorrect equipment connection or power amplifier failure, check the connection between sound source and speaker to ensure that the volume controller is not muted or turned down.

2. Noise interference: Noise is caused by power interference, signal line noise, ground wire problems, etc. Replace the power cord and signal cord as much as possible to ensure that the ground wire is well connected.