If your camera is buzzing it may be due to 1 of 2 reasons:
- Interference with other 2.4GHz devices, such as your mobile phone, or the camera is located very close to the parent or other camera causing static feedback/buzzing. In order to avoid such interference issues, it is always recommended to keep such devices at least 5 feet away from the monitor. This may resolve the buzzing you are hearing
- The power adapter may cause such an issue. Please switch between the power adapters of the camera and parent unit and then power the camera back on. If this solves the issue, the problem is with the power adapter.