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I can hear a loud humming when turned on but none of the keys make any sound

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What is the model and manufacturer ?

Posted on Oct 15, 2010

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Posted on Jan 02, 2017

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SOURCE: one of the speakers when

Hi there,
we need to do a little bit of fault finding here to narrow down where it's coming from or what is at fault.
First try physically swopping the speakers over and reconnecting (do not just switch the cables at the back of the amp). Is the sound still coming from the same side or has it swopped over? If it's swopped over, it's a speaker issue and needs replacing.
Ok, if the strange sound is still happening from the same side, have a look along the speakers cable path. Is the cable running along side any power cables or extension leads or is it near any wall warts or mains transformers (the type you get with mobile phones, keyboards, answer machines,etc). If so, move the speaker cable a considerable distance away from these. Now, has it stopped or the noise reduced?
If we are still not getting anywhere, see if you can try your speakers on a friend's system and/or try someone else's speakers you know to work on yours.
If his/her speakers are noisy on yours, firstly you have to consider that most sytems at very high volume will produce some noise, but if it's actually quite a loud audible noise that's relatively new to the system, you need to get the amplifer serviced.

Hope this helps

Good luck

Posted on Jan 07, 2011

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