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Sometimes there is music in the set-top box. What's the matter?
Music sometimes appears in the set-top box for the following reasons:

1. Poor contact between the TV and the audio cable of the set-top box.

2. The shielding layer of the audio and video cable between the TV and the set-top box is not in good contact with the ground terminal of the plug, and it is disconnected.

3. The noise of the audio output of the set-top box needs to be trimmed and tested.