Question about Sony SA-WM500 Subwoofer

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No sound Like everyone, my unit turns on but no sound. There is no click after the 5 second delay. I went ahead and pulled the board out and checked for any lose connections and there is none that i can see. The fuse is good, the speaker does work and there was no lose wires. The sub worked great for about 2 years and just stopped making any sounds, there is no vibration even coming in to the sub from the amps hum when it turns on. It worked perfect before and like others i never had a wine. Please help. thanks James

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  • sadsurround Dec 19, 2008

    I'm having this same issue. I have verified that it is receiving soundsignal from the receiver, but the speaker never makes a noise.

    Aside from the loose pin on the relay, is there anything else that could be causing this?

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I had the same exact problem, here is what someone else suggested I do:

I had a problem with no audio and I recently found the fix. When thesub still worked and you turn it on you hear one relay click and thenabout 5 seconds later a second relay clicks and the audio comes on. Theproblem I had lies with that second relay. When you take the case apartthere are 4 circuit boards. The big board with the two big bluecapacitors is the main board. Well next to the two blue capacitors is ablue relay. That relay had a pin that came un-soldered from the circuitboard. I re-soldered that pin and the sub works just like new.

Posted on Oct 08, 2008

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My problem is just like the ones posted here, i do not get the 2nd relay to click after 5 seconds or at all . I did remove the board and looked for loose solder joints i found nothing. Under the blue relay talked about here it looks as if a clear liquid is on the board could this have leaked anything? There is a white compound around the caps and the relay but i would like to think that was for vibration? Any place to get this relay if i need to replace it ?

Posted on Dec 03, 2009

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Re:I had a problem with no audio and I recently found the fix. When thesub still worked and you turn it on you hear one relay click and thenabout 5 seconds later a second relay clicks and the audio comes on. Theproblem I had lies with that second relay. When you take the case apartthere are 4 circuit boards. The big board with the two big bluecapacitors is the main board. Well next to the two blue capacitors is ablue relay. That relay had a pin that came un-soldered from the circuitboard. I re-soldered that pin and the sub works just like new. I did this & it worked! The relay is right below the power saving switch.

Posted on Jun 30, 2009

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