Loud hum from speakers: Solved

September 13, 2016

I had the devil of a time trying to get rid of a really bad hum in the speakers of a new mini hifi system that I’d connected up to a PC. I could hear the music faintly so I knew I had it connected properly, but that music was totally overridden by the loud hum.

I checked the manual, the manufacturer’s online support (useless) and forums, Dr Google, and tried various online advice about plugging the power cable into the same outlet as the PC, etc. Nothing changed.

Next, I checked listening via the FM radio option — no hum! That was my first clue. I pulled out the ‘audio in’ connection and the hum went away. Clue number two — it was somewhere in the connection from the PC to the unit. I crawled on the floor to the back of the PC, where the audio cable came out just a little too easily… I pushed it back in fully and restarted the hifi. It worked brilliantly — no hum!

Such a simple thing, but it caused me a lot of frustration for an hour. Hopefully this helps someone else.

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