How to test subwoofer output signal

[Juked07]

I have a Yamaha RX-V373 receiver powering a MLT-2 5.1 system. I just moved apartments and plugged everything in, and now I'm not getting sound from the subwoofer. I have checked all cables are connected. I checked the subwoofer fuse, which looked fine, and the red power LED on the front bottom of the subwoofer lights up also.

So I think either the subwoofer has gone bad somehow or my receiver has stopped outputting a signal from the subwoofer out. I don't have another subwoofer or another receiver to test with. How can I tell which component is the culprit here?

 

[razel]

The subwoofer RCA is just line-level, but just filtered for sub frequencies. Many ways to test. If you have headphone to RCA adapter you can just use your smartphone or any other headphone out and plug that directly into your subwoofer to see if it makes any kind of noise. Alternatively you can also just take the RCA subwoofer and move that to 'audio out' on the receiver. However whether you get output depends on the receiver. If you are inputting digital (HDMI, coax, optical), it may not come out the 'audio out' RCA.