I just got a used Cyber Acoustics CA3001 and the subwoofer is making almost like a lawnmower sound behind what should be bass. The way these speakers work is a single 3.5mm jack comes from the computer and is hard wired into the right speaker. A hard wired cord also connects the left and right speakers. The system runs on 9VAC 1000mA DC power. The subwoofer, which has speaker model YDDE78-9B, has an attached hard wired 3.5mm plug/cord that is plugged into the right speaker. It can be disconnected at the speaker.
I have cleaned the 2 3.5mm plugs, and ensured that all connections are secure. I have tried using wall power as well as a plug on a grounded power strip. Plugging the subwoofer directly into the computer results in extremely quiet playback, but is still audible, and correct.
Any ideas what I need to fix?
The back of the subwoofer speaker
The front of the circuit board inside the right speaker
The back of the circuit board inside the right speaker
I have cleaned the 2 3.5mm plugs, and ensured that all connections are secure. I have tried using wall power as well as a plug on a grounded power strip. Plugging the subwoofer directly into the computer results in extremely quiet playback, but is still audible, and correct.
Any ideas what I need to fix?
The back of the subwoofer speaker

The front of the circuit board inside the right speaker

The back of the circuit board inside the right speaker
