There Is Severe Hum, Noise, Or Distorted Sound - Sony MHC-V43D Help Manual

Help Guide
Home Audio System
MHC-V43D

There is severe hum, noise, or distorted sound.

If there are obstacles between the system and your BLUETOOTH device, remove or avoid the obstacles.
If there is equipment that generates electromagnetic radiation, such as a wireless LAN, other BLUETOOTH device,
or a microwave oven nearby, move them away.
Turn down the volume of the connected BLUETOOTH device.
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