The interior of the subwoofer is heated up. Does the subwoofer produce sound after you cool down the subwoofer and turn it back on?
Disconnect the AC power cord and cool down the subwoofer.
If the ventilation holes on the back of the unit are blocked, the interior of the subwoofer may heat up.
Make sure that the ventilation holes are not blocked.
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Produces sound
The issue was caused because the interior of the subwoofer is heated up.
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Does not produce sound