Question Need help with Yamaha HTR- 3064 issue. Sub woofer turns ON but does not produce any bass.

Oct 27, 2021
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Hi.
I have a Yamaha HTR-3064 5.1 Channel A/V Digital Receiver along with sub woofer model no. NS-SW20.

The issue: The sub woofer turns ON but does not produce any bass / sound.

Checks:
Cable between receiver and subwoofer is OK.
Except woofer all other speakers working OK.
All settings in the receiver are set to support woofer operation.
When the audio cable ( between receiver & woofer) is removed from receiver end and is touched with finger, the woofer makes a humming sound
video link

Can anyone help me to identify the issue here ?
 

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